Introduction

R&R Surgical Institute is one of only two Fellowship Council-approved programs in LA County that offers a fellowship in Bariatric Surgery & Advanced GI-MIS.

Description

The R&R Surgical Institute’s Bariatric & Advanced GI MIS Surgery Fellowship is a comprehensive one-year program focused on cultivating expertise in Bariatric and Minimally Invasive Surgery. Trainees receive foundational training in Bariatric Surgery while honing technical skills in a range of laparoscopic procedures, including hiatal hernia repair, management of esophageal motility disorders, hernia surgeries, biliary procedures, and solid organ surgeries. As Los Angeles’s largest independent bariatric center, R&R boasts an extensive case variety and volume, along with the necessary infrastructure to nurture the development of future leaders in bariatric and minimally invasive surgery. The program primarily operates at R&R Surgical Institute, an MBSAQIP-accredited ambulatory surgery center (ASC) with a 23-hour stay capability. 

The program’s objective is to produce experts in Bariatric Surgery and Minimally Invasive Surgery, both clinically and technically. It encompasses inpatient rounds, outpatient clinics, weekly didactic sessions, clinical research, and other relevant educational activities. The primary focus of the technical training is on advanced laparoscopic skills. By the end of the fellowship, fellows are expected to master manual laparoscopic techniques, including advanced intracorporeal anastomosis, laparoscopic suturing, fine tissue handling, and advanced dexterity. They should be able to effectively incorporate these skills into their practice. While DaVinci robots are available at hospitals and fellows are encouraged to learn robotic skills, robotic surgery is not the main emphasis of the program. Participation in the call schedule also affords the fellow the chance to conduct common general surgical procedures. Fellows will experience a uniquely diverse range of cases, receiving personalized instruction and thorough clinical mentorship.

By the conclusion of the year, fellows will have gained the skills and knowledge required to independently perform a broad spectrum of Bariatric and Minimally Invasive surgical procedures.

Basic Program Information

  • Location: Torrance, California
  • Primary Program Site: R&R Surgical Institute
  • Primary Hospital: Total bed size, # OR’s, # Surgical ICU beds: MBSAQIP and BDC Accredited ASC, 4 Fully integrated Operating rooms, 8 PACU bed
  • Secondary Program Site: Torrance Memorial Medical Center
  • Secondary Hospital: Total bed size, # OR’s, # Surgical ICU beds: MBSAQIP Accredited. 500 bed, 16 Operating Rooms, 33 ICU beds
  • Clinic locations and schedule: Clinic is located adjacent to the primary hospital. 3 days of afternoon clinics (in person and telemedicine).
  • University Affiliation: N/A
  • School of Medicine Affiliation: N/A
  • Year Program and/or Designation Established (Can be a future or anticipated year.): 2025
  • Number of Faculty: 4
  • Clinical: 90%
  • Research: 10%

Additional Program Information

  • Interaction with Residents: No residents
  • Is there a General Surgery Residency at the Primary Institution? No
  • Is there a General Surgery Residency at the Secondary Institution? No
  • Is there a curriculum in place for fellowship? Yes
  • Is there a skills lab at the institution with fellow access? Yes
  • Are there teaching conferences available for the fellow? Yes
  • Is there an evaluation tool for fellow by faculty in place? Yes
  • Is there an evaluation tool for faculty by fellow in place? Yes
  • Papers Accepted For Publication where PD was an author: 4
  • Publications that Involved Input from the Fellow: 0
  • Are funds available for the Fellow to attend conferences? 1

Malpractice Insurance Information

  • The fellow(s) only works as a fellow, i.e. does not/will not have attending privileges and the program provides the following:Claims-based malpractice coverage including a tail for the statute of limitations

Facilities

Dry Lab Wet lab Library Administrative Support Clinical Research Simulation Lab

Fellowship Opportunity

Number of Positions Available: 1

Type of Fellowship: Bariatrics

Duration: 1 year

Start Day: August 1

End Day: July 31

Is this a salaried position? Yes

It is a requirement that the salary must be commensurate to a PGY 6 or greater in the same city. Does your program meet this requirement? Yes

Is the salary guaranteed for the year? Yes

Is there funding available beyond salary for meeting attendance, research, etc? Yes

Is the salary dependent on call? No

Is the Fellow on call? Yes What are the on call requirements? The fellow will be on call for the program, supervised by the program attendings. The frequency of the call will range 5-6 calls per month

What are the estimated fellow weekly work hours? 40

It is a requirement that Health Insurance be provided. Do you provide health insurance to your fellows? Yes

Teaching Responsibilities: Yes

Courses/Academic Presentations: Yes

Does reimbursement for the above make up part of the salary? No

Does the fellowship contract include a non-compete clause? No

What type of malpractice insurance will cover the Fellow?

Clinical Outpatient Experience

Initial consultation

pre op visits

post op visit

Continuation of the care visits

Monthly group seminars

Mon and Wed afternoons

Research / Scholarship Resources

Our mission is to facilitate research and knowledge in biomedical sciences, patient care and healthcare administration. With access to extensive digital and print collections, access to key databases, technology and personalized support, digital library is a one-stop resource for the highest-quality information.

Program Directors Detailed Information

Ramin M. Roohipour MD, FACS, FASMBS

Program Director

At Institution Since: 2017

Program Director Since : 2024

Year Residency Training Completed : 14

Year Fellowship Training Completed : 13

Board Certification: Board Certified

Society Memberships

ACS

ASMBS

SAGES

Areas of Expertise

Complex revisional bariatric surgery, Complex and redo foregut surgeries, interventional endoscopies, complex MIS procedures, solid organ surgery

Teaching Qualifications

Active participation of student and resident teachings. Prior fellowship teaching.

Summary of Qualifications

Dr. Ramin Roohipour is a board-certified general surgeon with fellowship training in Minimally Invasive, Metabolic (Bariatric), and Endocrine Surgery. He graduated from medical school in 1996 and completed his residency in surgery at Columbia University College of Physicians & Surgeons at Harlem Hospital Center. With a keen interest in gastrointestinal surgery, Dr. Roohipour spent a year as a clinical research fellow in transplant surgery at the University of Miami, a year in colorectal surgery at Cleveland Clinic Florida, and a year researching Colorectal Oncologic Surgery at Memorial Sloan–Kettering Cancer Center in New York. He also completed a fellowship in Advanced Laparoscopy, Bariatric, and Endocrine Surgery at Icahn School of Medicine at Mount Sinai.

Dr. Roohipour holds board certification in General Surgery from the American Board of Surgery and is a Fellow of the American College of Surgeons. He is an active member of several professional societies including the Society of American Gastrointestinal and Endoscopic Surgeons (SAGES), American Society of Metabolic and Bariatric Surgery (ASMBS), and American Society of Colon & Rectal Surgeons (ASCRS), among others. In 2011, he received the prestigious ASMBS Certificate of Acknowledgment of Satisfactory Training in Bariatric Surgery, recognizing him among the top specialists nationwide.

Dr. Roohipour is a nationally recognized robotic surgeon, formerly an Associate Professor of Surgery at Icahn School of Medicine. He has pioneered robotic surgery techniques, including performing the first robotic Sleeve Gastrectomy in South Bay in 2014, and the first Robotic Single Site, Extra-Peritoneal Bilateral Inguinal Hernia Surgery in the U.S. the same year. In 2015, he performed Los Angeles’ first endoscopic Orbera Balloon placement and is the only surgeon in South Bay certified to perform endoscopic sleeve gastrectomy.

While specializing in Advanced Robotic, Laparoscopic Hernias, and Bariatric procedures, Dr. Roohipour also practices general surgery, treating a wide range of conditions including obesity, cancer, and gastrointestinal diseases like Nissen fundoplication. He has consistently received accolades for his compassionate care, including the “Compassionate Doctor Recognition” and “Patient’s Choice” Award for five consecutive years. From 2014 to 2022, Dr. Roohipour was also named among the Top 10 Surgeons of the LA Metro Area.

Education

Fellowship in Metabolic, Endocrine and Minimally Invasive (MEMIS), The Mount Sinai Hospital, NYC. NY. 2010-2011

Residency in General Surgery; Columbia University at Harlem Hospital Center, NYC. NY 2004-2010

Publications

– Roohipour, R. Angelo, A. Revision of Vertical Band Gastroplasty: Avoiding Pitfalls. Bariatric Times; 2023; 20 (7-12): 30-32

– Herron, D, Roohipour, R. Complications of Roux-en-Y gastric bypass and sleeve gastrectomy. Abd imaging 2012 Oct; 37(5): 712-8

– Herron, D, Roohipour, R. Bariatric Operations, Anatomy and Mechanisms ofAction. Gastrointest Endoscopy Clin N Am 21; 2011; 213–228

– Roohipour R, Patil S, Goodman KA, Minsky B, Wong WD, Guillem GJ, Paty PB,Weiser MR, Neuman HB, Shia J, Schragh D, Temple LK. Squamous cell carcinoma of the Anal Canal: Predictors of treatment Outcome. Diseases of TheColon and Rectum, 2008 Feb; 51(2):147-53

– Talus H, Roohipour R, Depaz H, Adu AK, Preduodenal portal vein causing duodenal obstruction in an adult patient. Journal of the American College ofSurgeon: 2006 Mar; 202(3): 552-3

– Ciancio G, Burke GW, Gaynor JJ, Mattiazzi A, Roohipour R, Carreno, MR, RothD, Ruiz P, Kupin W, Rosen A, Esquenazi V, Tzakis AG, Miller J. The Use of Campath-1H as Induction Therapy in Renal Transplantation: Preliminary Results.Transplantation: 2004 Aug; 78(3): 426-433

– Roohipour R, Varasteh Kia GR, Tehrani A, Moradi M. Comparison of two methods of bowel preparation: Polyethylene glycol, Neomycin, Erythromycin and ceftizoxime (PNEC) vs. Castor oil, Co-Trimoxazol, Metronidazole and Ceftizoxime(CCMC). 2002 Nov; 9(30): 349-356

– Roohipour R, Varasteh Kia GR, Tehrani A, Moradi M. Comparison of accuracy of trauma scoring system for prediction of patients’ prognosis. Journal of IranUniversity of medical Sciences: 2002 May; 9(28): 129-138

Abstracts

– Roohipour R, Herron D, Tabrizian P. Right Lower Quadrant Pain: AcuteAppendicitis? Give It A Second Thought! Oral presentation at the 2011 ACSMeeting, Scientific Session: VE01: Challenging and Unusual Problems in Surgery.San Francisco, CA, October 24, 2011.

– Roohipour R, Edye M, Kushnir L, Inabnet WB. Slipped Gastric Pouch: HiatalHernia after Gastric Bypass The Pearls of Successful Surgical Repair. Oral Presentation at the 2011 ACS Meeting, Scientific Session: VE23: Bariatric Surgery.San Francisco, CA, October 27, 2011.

– Roohipour R, Herron D, Kini S. Laparoscopic Gastrectomy for Gastric CancerFollowing Open Roux-En-Y Gastric Bypass. Oral Presentation at the 2011 AnnualSAGES Meeting, Scientific Session. Presenter: Roohipour, R. Session Number:SS07, Session: Best of Video II, San Antonio, TX. April 01, 2011.

– Edye M, Roohipour R, Kushnir L, Herron D, Jaffin B. Laparoscopic Revision ofEsophagomyotomy. Oral Presentation at the 2011 Annual SAGES Meeting,Scientific Session. Presenter: Roohipour, R. Session Number: SS03, SessionName: Best of Video I, San Antonio, TX. March 31, 2011.

– Roohipour R, Ahmed L, Sarhan M. Laparoscopic Extraction of JejunalPhytobezoar after Roux-En-Y Gastric Bypass. Oral presentation at the Society ofLaparoendoscopic Surgeons, 19th SLS Annual Meeting and Endo Expo 2010, ,New York City, NY, September 1-4, 2010.

– Roohipour R, Ahmed L. Laparoscopic Revision of Open Roux-En-Y GastricBypass with Fundus Resection. Abstract # 9306, S70. Oral presentation at theSociety of Laparoendoscopic Surgeons, 18th SLS Annual Meeting and Endo Expo2009, Boston, Massachusetts, September 9-12, 2009.

– Roohipour R, khalil B, Ahmed L. Laparoscopic Reduction of IntussusceptionFollowing Laparoscopic Roux-en-Y GBS. Abstract # 9308, S70. Oral presentation at the Society of Laparoendoscopic Surgeons, 18th SLS Annual Meeting and EndoExpo 2009, Boston, Massachusetts, September 9-12, 2009.

– Roohipour R, Patil S, Goodman KA, Minsky B, Wong WD, Guillem GJ, Paty PB,Weiser MR, Neuman HB, Shia J, Schragh D, Temple LK. Squamous cell carcinoma of the Anal Canal: Predictors of treatment Outcome. 2007 ASCRSabstract booklet # S24

– Mattiazzi A, Roohipour R, Ciancio G, Illanes H, Gaynor JJ, Cordovilla T, WarqueM, Carreno, MR, Roth D, Ruiz P, Kupin W, Rosen A, Esquenazi V, Tzakis AG,Miller J, Burke GW. Combined Thymoglobulin/ Daclizumab induction in high-risk renal transplantation. American Journal of Transplantation: 2005 May. Vol. 5 (s11);185. Abstract # 115

– Ciancio G, Burke GW, Roohipour R, Gaynor JJ, Mattiazzi A, Carreno, MR, RothD, Ruiz P, Kupin W, Rosen A, Esquenazi V, Tzakis AG, Miller J. Prophylaxis forCytomegalovirus Disease in a randomized trial of three different immunosuppressive regimens in renal transplantation. 2004 may. Vol. 4 (s8); 494.Abstract # 1228

– Ciancio G, Roohipour R, Burke GW, Gaynor JJ, Mattiazzi A, Carreno, MR, RothD, Ruiz P, Kupin W, Rosen A, Esquenazi V, Tzakis AG, Miller J. The Use ofCampath-1H as Induction Therapy in Renal Transplantation: Preliminary Results.American Journal of Transplantation: 2004 May. Vol. 4 (s8); 404. Abstract # 902

– Ciancio G, Burke GW, Gaynor JJ, Mattiazzi A, Roohipour R, Carreno, MR, RothD, Ruiz P, Kupin W, Rosen A, Esquenazi V, Tzakis AG, Miller J. Randomized trial of three different induction regimens to prevent acute renal allograft rejection: early results. Am. Journal of Transplantation: 2004 May. Vol. 4 (s8); 266. Abstract # 392

– Roohipour R, Varasteh Kia GR, Tehrani A, Moradi M. Comparison of the Accuracy Of the Trauma Scoring System for prediction of Patients’ Prognosis. The EuropeanAssoc. of Emergency Medicine: 2001 Dec 8 (s4); 121. Abstract # 226

– Roohipour R, Varasteh Kia GR, Tehrani A, Moradi M. Comparison of two methods of bowel preparation: Polyethylene glycol, Neomycin, Erythromycin and ceftizoxime(PNEC) vs. Castor oil, Co-Trimoxazol, Metronidazole and Ceftizoxime (CCMC).Journal of Iran University Student research committee: 1998 Oct. Vol 2 (s1): 11 Abstract # 28

Oral Presentation

– Roohipour R, Herron D, Tabrizian P. Right Lower Quadrant Pain: AcuteAppendicitis? Give It A Second Thought! Oral presentation at the 2011 ACSMeeting, Scientific Session: VE01: Challenging and Unusual Problems in Surgery.San Francisco, CA, October 24, 2011

– Roohipour R, Edye M, Kushnir L, Inabnet WB. Slipped Gastric Pouch: HiatalHernia after Gastric Bypass The Pearls of Successful Surgical Repair. Oral presentation at the 2011 ACS Meeting, Scientific Session: VE23: Bariatric Surgery.San Francisco, CA, October 27, 2011

– Roohipour R, Herron D, Kini S. Laparoscopic Gastrectomy for Gastric CancerFollowing Open Roux-En-Y Gastric Bypass. Oral Presentation at the 2011 AnnualSAGES Meeting, Scientific Session. Presenter: Roohipour, R. Session Number:SS07, Session: Best of Video II, San Antonio, TX. April 01, 2011

– Edye M, Roohipour R, Kushnir L, Herron D, Jaffin B. Laparoscopic Revision ofEsophagomyotomy. Oral Presentation at the 2011 Annual SAGES Meeting, Scientific Session. Presenter: Roohipour, R. Session Number: SS03, SessionName: Best of Video I, San Antonio, TX. March 31, 2011

– Roohipour R, Ahmed L, Sarhan M. Laparoscopic Extraction of JejunalPhytobezoar after Roux-En-Y Gastric Bypass. Oral presentation at the Society ofLaparoendoscopic Surgeons, 19th SLS Annual Meeting and Endo Expo 2010, NewYork City, NY. USA. September 1-4, 2010.

– Roohipour R, Leaque A. Laparoscopic Revision of Open Roux-En-Y GastricBypass with Fundus Resection. Oral presentation at the Society ofLaparoendoscopic Surgeons, 18th SLS Annual Meeting and Endo Expo 2009,Boston, Massachusetts, USA. September 9-12, 2009

– Roohipour R, Khalil B, Leaque A. Laparoscopic Reduction of IntussusceptionFollowing Laparoscopic Roux-en-Y GBS. Oral presentation at Society ofLaparoendoscopic Surgeons, 18th SLS Annual Meeting and Endo Expo 2009,Boston, Massachusetts. September 9-12, 2009

– Roohipour R, Patil S, Goodman KA, Minsky B, Wong WD, Guillem GJ, Paty PB,Weiser MR, Neuman HB, Shia J, Schragh D, Temple LK. Squamous cell carcinoma of the Anal Canal: Predictors of treatment Outcome. ASCRS annual meeting. St. Louis, MO. June 24, 2007

– Mattiazzi A, Roohipour R, Ciancio G, Illanes H, Gaynor JJ, Cordovilla T, WarqueM, Carreno, MR, Roth D, Ruiz P, Kupin W, Rosen A, Esquenazi V, Tzakis AG,Miller J, Burke GW. Combined Thymoglobulin/ Daclizumab induction in high-risk renal transplantation. American Transplant Congress. Boston, MA. 2005

– Ciancio G, Burke GW, Roohipour R, Gaynor JJ, Mattiazzi A, Carreno, MR, RothD, Ruiz P, Kupin W, Rosen A, Esquenazi V, Tzakis AG, Miller J. Prophylaxis forCytomegalovirus Disease in a randomized trial of three different immunosuppressive regimens in renal transplantation. American TransplantCongress. Boston, MA. 2004

– Ciancio G, Roohipour R, Burke GW, Gaynor JJ, Mattiazzi A, Carreno, MR, RothD, Ruiz P, Kupin W, Rosen A, Esquenazi V, Tzakis AG, Miller J. The Use ofCampath-1H as Induction Therapy in Renal Transplantation: Preliminary Results.American Transplant Congress. Boston, MA. 2004

– Ciancio G, Burke GW, Gaynor JJ, Mattiazzi A, Roohipour R, Carreno, MR, RothD, Ruiz P, Kupin W, Rosen A, Esquenazi V, Tzakis AG, Miller J. Randomized trial of three different induction regimen to prevent acute renal allograft rejection.American Transplant Congress. Boston, MA. 2004

– Roohipour R, Sands DR, Wexner SD. Management of rectal prolapse. SouthFlorida Chapter of American College of Surgeon. Miami, FL. 2003

– Roohipour R, Tehrani A, Moradi M. Comparison of accuracy of trauma scoring system for prediction of patients’ prognosis. First Mediterranean Symposium ofEmergency Medicine Congress. Stresa, Italy 2001

– Roohipour R, Varasteh Kia GR, Tehrani A, Moradi M. Comparison of two methods of bowel preparation: First Iranian Medical Graduates Thesis Festival. Tehran, Iran.1998.

Ryan B. Cohen, MD, DABOM

Associate Program Director

At Institution Since: 2024

Program Director Since: 2025

Year Residency Training Completed: 2023 

Year Fellowship Training Completed: 2024

Board Certification: 

  • The American Board of Surgery
  • The American Board of Obesity Medicine

Society Memberships

  • ACS
  • ASMBS
  • SAGES

Areas of Expertise

Bariatric and Foregut Surgery

Abdominal wall and hernia surgery

Anorectal surgery and Colonoscopy

Endoscopy

Teaching Qualifications

Mohan B. Das Outstanding Chief Resident Award, 2023

Robert G. Somers Outstanding Resident Educator Award, 2023

R&R Bariatric and GI Surgery fellow associated program direction, 2025

Summary of Qualifications

Dr. Ryan B. Cohen is a board-certified general surgeon with fellowship training in Advanced Gastrointestinal and Metabolic/Bariatric Surgery. He earned his Medical Doctorate from Boston University School of Medicine and completed his residency in general surgery at Einstein Medical Center, where he received the Outstanding Resident Educator Award and the Outstanding Chief Resident Award.

Dr. Cohen pursued further specialization with a fellowship in Advanced Gastrointestinal and Bariatric Surgery at UC Davis Medical Center, gaining expertise in advanced laparoscopy, endoscopy, and robotic surgery. He is double-board certified by the American Board of Surgery and the American Board of Obesity Medicine. He has authored numerous peer-reviewed papers and has presented cutting-edge research at national conferences, including those hosted by the Society of American Gastrointestinal and Endoscopic Surgeons (SAGES) and the American College of Surgeons (ACS). His academic contributions have been recognized with several research awards, and he remains an active reviewer for multiple peer-reviewed journals.

Dr. Cohen is committed to providing exceptional patient care, characterized by his excellent bedside manner, meticulous attention to detail, and technical expertise. He performs peri-operative endoscopy, gastric sleeve and Roux-en-Y gastric bypass procedures, as well as revisional and conversion surgeries for patients who have undergone previous bariatric operations. Patients can feel secure and confident in their weight loss journey under his care.

Additionally, Dr. Cohen handles a wide range of general surgery procedures, including advanced hernia repair, abdominal wall reconstruction, anti-reflux surgery, anorectal surgery, and other complex GI surgeries, utilizing both laparoscopic and robotic techniques. 

Leadership and Teaching Roles

Mohan B. Das Outstanding Chief Resident Award June 2023

Robert G. Somers Outstanding Resident Educator Award June 2023

Clinical Learning Environment Review, Einstein Healthcare Network 2021-2023

Surgical Quality Committee, Einstein Healthcare Network 2021-2023

Trauma Research Committee, Einstein Healthcare Network 2019-2023

Journal Club Coordinator, Einstein Healthcare Network 2018-2020

Publications

Peer-reviewed Manuscripts

  1. Lyo V, Cohen RB, Zheng Z, Sultany M, Mendez M, Kim C, Ahmen S, Shamseddeen H, Ali M. Outcomes of Hiatal Hernia Repair after Roux-en-Y Gastric Bypass: Largest Retrospective Cohort Study to Date. SOARD. 2025. Epub ahead of print. 
  2. Camacho K, Cohen RB, Kapadia S, Gondra N, Parr JD, Kaneski M, Shamseddeen H, Pierce JL, Ho H, Ahmed S, Ali MR, Lyo V. Hyperkinetic biliary dyskinesia: An underrecognized problem with good surgical outcomes after cholecystectomy. Cureus 16(6):e63237.  June 2024. doi:10.7759/cureus.63237. PMID: 39070494.
  3. Marquez B, Luciano E, Cohen RB, Maser C, Hubbard M. Perforated pre-pyloric ulcer in the gastric remnant over a decade after Roux-en-Y gastric bypass: A case report. Int J Surg Case Rep. 2023;111:108888. doi:10.1016/j.ijscr.2023.108888. PMID: 37806030.
  4. Ward C, Olafson S, Cohen RB, Kaplan M, Bloom A, Parsikia A, Moran B, Leung P. Combination of Lactate and Base Deficit Levels at Admission to Predict Mortality in Blunt Trauma Patients. Cureus. 2023; 15(6), e40097. PMID: 37425498.
  5. Cohen RB, Severance G, Olafson SN, Ward C, Parsikia A, Bloom A, Moran B, Kaplan M, Leung P. Laparoscopic Cholecystectomy in the Time of Coronavirus: A Level-1 Trauma Center’s Experience. Am Surg. 2022; Epub ahead of print. PMID: 36070958.
  6. Ward C, Cohen RB, Olafson S, Goetz A, Leung P, Moran B, Strain J, Parsikia A, Kaplan M. Impact of Repeat Head Computed Tomography on Mild Traumatic Brain Injury Patients With Abbreviated Injury Score 1-2 Injuries. Am Surg. 2022;88(8):1946-1953. PMID: 35225007.
  7. Ward C, Goetz A, Olafson S, Cohen RB, Kaplan M, Moran B, Strain J, Parsikia A, Leung P. More Than a Mean to an End: Assessing Provider Familiarity with Palliative Care. Am Surg. 2021; 89(5):1369-1375. PMID: 34738859.
  8. Cohen RB, Narwhal T, Winikoff S, Hubbard M. Minimally invasive management of de Garengeot hernia with staged robotic hernia repair. BMJ Case Rep. 2021;14(8):e242569. PMID: 34344646.
  9. Olafson SN, Cohen RB, Parsikia A, Moran B, Kaplan MJ, Leung P. Insurance Status Impacts Hospital Discharge for Penetrating Trauma Survivors. Am Surg. 2022;88(8):1996-2002. PMID: 34053228.
  10. Cohen RB, Olafson SN, Krupp J, Parsikia A, Kaplan MJ, Moran B, Parkson Leung PS. Timing of Gastrografin Administration in the Management of Adhesive Small Bowel Obstruction: Does It Matter? Surgery. 2021;170(2):596-602. PMID: 33836900.
  11. Anand N, Alayan A, Cohen JE, Cohen RB, Khandehroo B. Clinical and Radiologic Fate of the Lumbosacral Junction After Anterior Lumbar Interbody Fusion Versus Axial Lumbar Interbody Fusion at the Bottom of a Long Construct in CMIS Treatment of Adult Spinal Deformity. J Am Acad Orthop Surg Glob Res Rev. 2018;2(10). PMID: 30656254.
  12. Anand N, Cohen JE, Cohen RB, Khandehroo B, Kahwaty S, Baron E. Comparison of a Newer Versus Older Protocol for Circumferential Minimally Invasive Surgical (CMIS) Correction of Adult Spinal Deformity (ASD)-Evolution Over a 10-Year Experience. Spine Deform. 2017;5(3):213-223. PMID: 28449965.
  13. Anand N, Cohen RB, Cohen JE, Khandehroo B, Kahwaty S, Baron E. The Influence of Lordotic cages on creating Sagittal Balance in the CMIS treatment of Adult Spinal Deformity. Int J Spine Surg. 2017;11:23. PMID: 28765807.

Oral Presentations

  1. Cohen RB, Camacho K, Kapadia S, Parr J, Baldini T, Kaneski M, Ahmed S, Lyo V. Hyperkinetic Biliary Dyskinesia: An Underrecognized Problem with Good Surgical Outcomes After Cholecystectomy. SAGES Annual Meeting, Cleveland, Ohio, Apr 2024.
  2. Kozian, L., Cohen, R. B., Adnan, S., Casey, M., Godbole, M., & Leung, P. (2023). Zebras posing as horses: A case report on intestinal malrotation misdiagnosed as a strangulated umbilical hernia. NYU Langone Hospital – Long Island Annual Hernia Symposia, 2023.
  3. Cohen RB, Godbole M, Ward C, Kozian L, Adnan S, Parsikia A, Bloom A, Moran B, Kaplan M, Leung P. Predictors of Complicated Gallstone Disease During the COVID-19 Pandemic. SAGES Annual Meeting, Montréal, Québec, Canada, Mar 2023. 
  4. Cohen RB, Ward C, Olafson S, Parsikia A, Bloom A, Moran B, Leung P, Kaplan M. Finding Success: Implementing a Trauma Tertiary Survey at a Level 1 Trauma Center Society of Critical Care Medicine (SCCM), San Francisco, Jan 2023.
  5. Ward C, Olafson S, Cohen RB, Kaplan M, Bloom A,  Parsikia A, Moran B, Leung P. Predictive Ability of Combination Admission Lactate and Base Deficit in Blunt Trauma Patients. Society of Critical Care Medicine (SCCM), San Francisco, Jan 2023.
  6. Cohen RB, Ward C, Kozian L, Olafson S, Ketchum W, Parsikia A, Bloom A, Kaplan M, Leung P, Moran B. A Nationwide Analysis on the Origins of De Novo Pulmonary embolism in Trauma Patients: Does the Liver Play A Role? Owen H Wangensteen Scientific Forum at American College of Surgeons Clinical Congress, San Diego, Oct 2022.
  7. Godbole M, Cohen RB, Ward C, Olafson S, Parsikia A, Ng J, Bloom A, Kaplan M, Leung P, Moran B. Presentation Length of Stay Is Increased in Trauma Patients Admitted At the End of the Week Versus the Beginning of the Week. Owen H Wangensteen Scientific Forum at American College of Surgeons Clinical Congress, San Diego, Oct 2022.
  8. Ward C, Cohen RB, Olafson S, Parsikia A, Bloom A, Kaplan M, Moran B, Leung P. Utility of Admission Lactate and Base Deficit in Combination to Predict Mortality in Blunt Trauma Patients. Einstein Research Recognition Week, May 2022. Awarded second place for resident research competition.
  9. Cohen RB, Ward C, Olafson S, Leung, P, Kaplan M, Strain J, Parsikia A, Moran B. A Statewide Analysis on the Origins Of De Novo Pulmonary Embolism: Does The Liver Play A Role? Society of Critical Care Medicine (SCCM), San Juan, Feb 2022 (accepted). 
  10. Cohen RB, Olafson S, Ward C, Kaplan M, Moran B, Strain J, Parsikia A, Leung P. Laparoscopic Cholecystectomy in the Time of Coronavirus: A Level 1 Trauma Center’s Experience. Society of Critical Care Medicine (SCCM), San Juan, Feb 2022 (accepted). 
  11. Ward C, Cohen RB, Olafson S, Goetz A, Leung P, Strain J, Moran B, Parsikia A, Kaplan M. Utility of repeat head CT on mild traumatic brain injury patients. Society of Critical Care Medicine (SCCM), San Juan, Feb 2022
  12. Nieves G, Cohen RB, Olafson S, Ward C, West S, Hasz R, Parsikia A, Leung P, Moran B. Gunshot Wounds and Non-Survivable Brain Injury: Predictors and Barriers of Successful Organ Donation. Society of Critical Care Medicine (SCCM), San Juan, Feb 2022 (accepted). 
  13. Cohen RB, Ward C, Olafson S, Parsikia A, Kaplan M, Leung P, Moran B. Origins Of De Novo Pulmonary Embolism (DNPE) In Trauma Patients: Does The Liver Play A Role? Owen H Wangensteen Scientific Forum at American College of Surgeons Clinical Congress, Virtual, Oct 2021.
  14. Cohen RB, Olafson S, Goetz A, Ward C, Parsikia A, Moran B, Leung P, Kaplan M. Lessons Learned – Introducing A Trauma Tertiary Survey (TTS) Protocol At A Level-1 Trauma Center. Owen H Wangensteen Scientific Forum at American College of Surgeons Clinical Congress, Virtual, Oct 2021. 
  15. Ward C, Goetz A, Olafson S, Cohen RB, Kaplan M, Moran B, Strain J, Parsikia A, Leung P. More Than a Mean to an End. Assessing Provider Familiarity with Palliative Care. Owen H Wangensteen Scientific Forum at American College of Surgeons Clinical Congress, Virtual, Oct 2021. 
  16. Olafson S, Cohen RB, Ward C, Sailes S, Sharlin M, Kaplan M, Parsikia A, Moran B, Leung P. EAST vs. WEST: How a Level 1 Trauma Center Splits the Difference in Resuscitative Thoracotomy. Owen H Wangensteen Scientific Forum at American College of Surgeons Clinical Congress, Virtual, Oct 2021. 
  17. Cohen RB, Ward C, Olafson S, Parsikia A, Kaplan M, Leung P, Moran B. A Statewide Analysis on the Origins Of De Novo Pulmonary Embolism (DNPE) In Trauma Patients: Does the Liver Play a Role? 25th Annual PaCOT/PTSF Conference, Virtual, Oct 2021.
  18. Olafson S, Cohen R, Moran B, Parsikia A, Kaplan M, Leung P. The Impact of Insurance Status on Hospital Discharge for Penetrating Trauma Survivors: One Decade of Experience from an Urban Level 1 Trauma Center, Einstein Medical Center Resident Research Competition Finalist, Philadelphia PA, May 2021.
  19. Ward C, Olafson S, Cohen RB, Goetz A, Leung P, Moran B, Strain J, Parsikia A, Kaplan M. More Than Means to an End: Assessing Provider Familiarity with Palliative Care. Philadelphia Academy of Surgery Surgical Trainee Paper Competition, Virtual, Feb 2021.
  20. Cohen RB, Olafson S,  Kaplan M, Moran B, Leung P. Predictors of 1-Year Mortality Following Gastrografin Challenge For Adhesive Small Bowel Obstruction. Academic Surgical Congress (ASC), Virtual, Feb 2021.
  21. Cohen RB, Olafson S, Krupp J, Kaplan MJ, Moran B, Parkson Leung P. Timing of Gastrografin Administration in the Management of Adhesive Small Bowel Obstruction: Does It Matter? Owen H Wangensteen Scientific Forum at American College of Surgeons Clinical Congress, Virtual, Oct 2020. DOI:https://doi.org/10.1016/j.jamcollsurg.2020.07.212
  22. Anand N, Cohen RB, Cohen JE, Khandehroo B, Kahwaty S, Baron EM. An Analysis of Outcome Predictors with Circumferential Minimally Invasive Surgical Correction (CMIS) of Adult Spinal Deformity (ASD) – A Multivariate Linear Regression Analysis. International Society for the Advancement of Spine Surgery (ISASS), Boca Raton, Apr 2017.
  23. Anand N, Cohen JE, Cohen RB, Khandehroo B, Kahwaty S, Baron EM. Clinical and Radiological Fate of the Lumbosacral Junction Following ALIF vs. AxiaLIF at the Bottom of a Long Construct in CMIS Treatment of Adult Spinal Deformity: International Society for the Advancement of Spine Surgery (ISASS), Boca Raton, Apr 2017.
  24. Anand N, Cohen JE, Cohen RB, Khandehroo B, Kahwaty S, Baron EM. What is the Minimal Clinical Important Difference (MCID) in Patients Undergoing Circumferential Minimally Invasive Correction (CMIS) Correction of Adult Spinal Deformity (ASD)? International Society for the Advancement of Spine Surgery (ISASS), Boca Raton, Apr 2017.
  25. Anand N, Cohen JE, Cohen RB, Khandehroo B, Kahwaty S, Baron EM. Analysis of Operative Outcomes in Elderly Patients Following Circumferential Minimally Invasive Surgical (CMIS) Correction of Adults Spinal Deformity (ASD). International Society for the Advancement of Spine Surgery (ISASS), Boca Raton, Apr 2017.
  26. Anand N, Cohen JE, Cohen RB, Khandehroo B, Baron EM, Kahwaty S. The Incidence of Proximal Junctional Kyphosis (PJK) Based on Upper-instrumented Vertebrae (UIV) in Patients Undergoing Circumferential Minimally Invasive Surgical (CMIS) Correction of Adult Spinal Deformity. North American Spine Society (NASS), Boston, Oct 2016. 
  27. Anand N, Khandehroo B, Cohen JE, Cohen RB, Baron E, Kahwaty S. Analysis of actual segmental lordosis obtained with lordotic and hyperlordotic lateral cages- Analysis of 218 levels. International Society for the Advancement of Spine Surgery (ISASS), Las Vegas, Apr 2016.
  28. Anand N, Khandehroo B, Cohen RB, Cohen JE, Kahwaty S, Baron EM. Does Poor Post-op Sagittal Vertical Alignment Directly Correlate with Poor Functional Outcomes in Patients with Circumferential Minimally Invasive Correction of Adult Spinal Deformity? International Society for the Advancement of Spine Surgery (ISASS), Las Vegas, Apr 2016.
  29. Anand N, Khandehroo B, Cohen RB, Cohen JE, Kahwaty S, Baron EM. Analysis of Actual Segmental Lordosis Obtained with Lordotic and Hyperlordotic Later Cages – Analysis of 172 Levels. Society for Minimally Invasive Spine Surgery (SMISS), Las Vegas, Nov 2015.
  30. Anand N, Cohen RB, Cohen JE, Khandehroo B, Baron EM, Kahwaty S. Analysis of the 10 Best and 10 Worst Functional Outcomes of Circumferential Minimally Invasive Surgical (CMIS) Correction of Adults Spinal Deformity (ASD). Society for Minimally Invasive Spine Surgery (SMISS), Las Vegas, Nov 2015.
  31. Anand N, Khandehroo B, Baron EM, Kahwaty S, Cohen JE, Cohen RB. Correction of Sagittal Profile and Pelvic Parameters with CMIS Techniques for Treatment of Adult Scoliosis. International Society for the Advancement of Spine Surgery (ISASS), Miami, Apr 2014.
  32. Anand N, Khandehroo B, Baron EM, Kahwaty S, Cohen JE, Cohen RB. 5 Year Outcomes and Survivorship Analysis of Posterior Pedicle Screw Non-fusion Stabilization. International Society for the Advancement of Spine Surgery (ISASS), Miami, Apr 2014.
  33. Anand N, Khandehroo B, Baron EM, Kahwaty S, Cohen JE, Cohen RB. Reoperation and Immediate Readmission Rates after Circumferential Minimally Invasive Surgical (CMIS) Correction of Adult Spinal Deformities (ASD). International Society for the Advancement of Spine Surgery (ISASS), Miami, Apr 2014. 
  34. Anand N, Khandehroo B, Baron EM, Kahwaty S, Cohen JE, Cohen RB. Limitation and ceiling effects of Circumferential minimally Invasive Surgical (CMIS) Techniques for the Treatment of Adult Scoliosis – Analysis of a 6-year Experience. International Society for the Advancement of Spine Surgery (ISASS), Miami, Apr 2014. 

Poster Presentations

  1. Cohen RB, Camacho K, Kapadia S, Parr J, Baldini T, Kaneski M, Ahmed S, Lyo V. Hyperkinetic Biliary Dyskinesia: An Underrecognized Problem with Good Surgical Outcomes After Cholecystectomy. 35th Annual UC Davis Research Symposium, Sacramento, CA, Apr 2024.
  2. Kozian L, Cohen RB, Adnan S, Casey M, Godbole M, Leung P. Benefits of Early Management of Intestinal Malrotation in Adults: Case Review. SAGES Annual Meeting, Montréal, Québec, Canada, Mar 2023.
  3. Marquez B, Cohen RB, Hubbard M. Perforated Pre-Pyloric Ulcer in the Remnant Stomach Over a Decade After Roux-en-Y Gastric Bypass. Metro Philadelphia ACS (MPACS), Philadelphia, Sep 2022.
  4. Ward C, Cohen RB, Olafson S, Parsikia A, Bloom A, Kaplan M, Moran B, Leung P. Utility of Admission Lactate and Base Deficit in Combination to Predict Mortality in Blunt Trauma Patients. Metro Philadelphia ACS (MPACS), Philadelphia, Sep 2022. Awarded second place for surgical abstract presentation.
  5. Cohen RB, Severance G, Olafson S, Ward C, Kaplan M, Parsikia A, Bloom A, Moran B, Leung P. Laparoscopic Cholecystectomy in the Time of Coronavirus: A Level 1 Trauma Center’s Experience. Einstein Research Recognition Week 2022, Virtual, May 2022. 
  6. Olafson S, Cohen R, Moran B, Parsikia A, Kaplan M, Leung P. The Impact of Insurance Status on Hospital Discharge for Penetrating Trauma Survivors. One Decade of Experience from an Urban Level 1 Trauma Center. Owen H  Wangensteen Scientific Forum at American College of Surgeons Clinical Congress, Virtual, Oct 2021.
  7. Cohen RB, Ward C, Olafson S, Parsikia A, Kaplan M, Leung P, Moran B. Origins of De Novo Pulmonary Embolism in Trauma Patients: Does the Liver Play a Role? Einstein Research Recognition Week 2021, Virtual, May 2021.
  8. Cohen RB, Olafson S, Ward C, Krupp J, Parsikia A, Kaplan M, Moran B, Leung P. Timing of Gastrografin (GG) Administration in the Management of Adhesive Small Bowel Obstruction (ASBO): Does it Matter? Einstein Research Recognition Week 2021, Virtual, May 2021.
  9. Cohen RB, Olafson S, Goetz A, Ward C, Parsikia A, Moran B, Leung P, Kaplan M. Lessons Learned – Introducing a Trauma Tertiary Survey Protocol at a Level-1 Trauma Center. Einstein Research Recognition Week 2021, Virtual, May 2021.
  10. Ward C, Goetz A, Olafson S, Cohen RB, Kaplan M, Moran B, Strain J, Parsikia A, Leung P. More Than a Mean to an End: Assessing Provider Familiarity with Palliative Care. Einstein Research Recognition Week 2021, Virtual, May 2021.
  11. Cohen RB, Nerwal T, Winikoff S, Hubbard M. Minimally Invasive Management of De Garengeot Hernia with Laparoscopic Appendectomy and Staged Robotic Hernia Repair. Einstein Virtual Case Report Competition, Virtual, Feb 2021. 
  12. Cohen RB, Chandolias N, Khanmoradi K, Campos S, Kaul H, Walter J, Rossi S, Navarro V, Zaki R. Utilization of Hepatitis C Viremic Donors in Liver Transplantation. A Single Center Experience. American Transplant Congress, Virtual, May 2020.
  13. Anand N, Cohen RB, Cohen JE, Khandehroo B, Kahwaty S, Baron EM. Does Obesity Affect Outcomes of Patients Undergoing Circumferential Minimally Invasive Surgical (CMIS) Correction of Adults Spinal Deformity (ASD)? International Society for the Advancement of Spine Surgery (ISASS), Boca Raton, Apr 2017.

Book Chapters

  1. Anand N, Cohen JE, Cohen RB. “Pre-Psoas (Oblique) Lateral Interbody Fusion.” Lumbar Interbody Fusions, 1st ed., Elsevier, 2019, pp. 99–110. doi:10.1016/b978-0-323-47663-8.00012-1.
  2. Anand N, Perri B, Cohen JE, Cohen RB. “Posterior Cervical Osteotomy Techniques.” Operative Techniques: Spine Surgery, 3rd ed., Elsevier, 2018, pp. 123-130. doi:10.1016/b978-1-4160-3279-3.50018-x.
  3. Anand N, Cohen JE, Cohen RB. “Thoracolumbar Deformity MIS (Palsy) Surgery Complication.” Spinal Deformity, Springer, 2018, pp. 211-218. doi:10.1007/978-3-319-60083-3_22.

Essays

  1. Cohen RB. Rhinoplasty and the roosari from ancient Persia to modern day Iran. ACESO: Journal of the Boston University School of Medicine History Society. 2016;4(1):5–7.

Institutional DIO

Stanley Klein, MD, FACS

Fellowship Program DIO (AIO)

James Nguyen, MD

Citizenship and Visa Requirements

US Citizens

US Permanent Residents (Green Card)

Medical School Requirements

We accept graduates of U.S. or Canadian Medical Schools and Foreign Medical Schools

We accept graduates of Foreign Medical Schools only if ECFMG Certified

Examinations and Certifications

Applicants must have passed the USMLE/COMLEX Step 1, 2, & 3 exams

Applicants must have had at least 2 years of prior training in an ACGME accredited residency or fellowship (or Canadian equivalent)

Applicants who are ABS or Canadian Board Eligible or Certified

Licensure Requirements and Information

CA state license is required

How to Apply

Visit https://www.fellowshipcouncil.org/

Contact Information For Questions

Ramin Roohipour, MD, FACS, FASMBS
Program Director
Phone: 310.326.3066
Fax: 310.326.3068
Email: roohipour@randrsurgical.org

https://randrsurgical.org/fellowship-program