PhillipRobertFleshnerMD

Colon & Rectal Surgery • Los Angeles, CA

Clinical Professor of Surgery, UCLA-David Geffen School of Medicine

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Office
8737 Beverly Blvd
#101
Los Angeles, CA 90048
Phone+1 310-289-9277

Fax+1 310-289-8995
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Education & Training

Lahey ClinicResidency, Colon and Rectal Surgery, 1990 - 1991
Icahn School of Medicine at Mount Sinai/Mount Sinai HospitalResidency, Surgery, 1984 - 1990
Albert Einstein College of MedicineClass of 1984

Certifications & Licensure

CA State Medical License 1991 - 2025
American Board of Colon and Rectal Surgery Colon & Rectal Surgery

Awards, Honors, & Recognition

Top Doctors:LA Area Castle Connolly, 2013
Top Doctors:Southern California Castle Connolly, 2012
CMS Meaningful Use Stage 1 Certification EpicCare Ambulatory EMR, Epic Systems Corporation, 2012-2013
Super Doctor SuperDoctors.com
Fellow (FACS) American College of Surgeons
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Clinical Trials

Effect of Sugared Chewing Gum on Gastrointestinal Recovery After Major Colorectal Surgery Start of enrollment: 2010 Aug 01
Completed
Not Applicable
Trial Comparing Low Dose and High Dose Steroids in Patients Undergoing Colorectal Surgery Start of enrollment: 2010 Sep 01
Completed
Not Applicable
Stoma Tube Decompression and Postoperative Ileus After Major Colorectal Surgery Start of enrollment: 2013 Jul 01
Terminated
Not Applicable
Optimal Duration of Indwelling Urinary Catheter Following Pelvic Surgery Start of enrollment: 2012 Nov 30
Completed
Not Applicable
Prospective Study on Preoperative Versus Postoperative Venous Thromboprophylaxis in Patients Undergoing Major Colorectal Surgery Start of enrollment: 2013 Sep 01
Completed
Phase 3
Study to Determine Risk Factors for Post-operative Infection in Inflammatory Bowel Disease Start of enrollment: 2014 Feb 01
Completed
Use of Post Operative Loperamide in Colorectal Patients After Diverting Ileostomies Start of enrollment: 2014 Oct 07
Terminated
Phase 3
Plasma ctDNA in Patients Undergoing Diagnostic Colonoscopy Start of enrollment: 2016 Jan 01
Completed
Trial of Low Residue Diet Versus Clear Liquids Following Elective Colorectal Surgery Start of enrollment: 2017 Aug 16
Completed
Not Applicable
MeSenteric SpAring Versus High Ligation Ileocolic Resection for the Prevention of REcurrent Crohn's DiseaSe (SPARES) Start of enrollment: 2020 Jul 28
Recruiting
Not Applicable
Seeded Cells on Matrix Plug Treating Crohn's Perianal Fistulas (STOMP-II) Start of enrollment: 2021 Sep 13
Recruiting
Phase 2
Roles: Contact
Study to Assess Efficacy and Safety of Cx601, Adult Allogeneic Expanded Adipose-derived Stem Cells (eASC) for the Treatment of Complex Perianal Fistula(s) in Participants With Crohn's Disease (CD) Start of enrollment: 2017 Sep 15
Completed
Phase 3
Roles: Principal Investigator
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Publications & Presentations

PubMed

Blinded Intraoperative Quantitative Indocyanine Green Metrics Associate With Intestinal Margin Acceptance in Colorectal Surgery.
Evan D Adams, Jean F Salem, Miguel A Burch, Phillip R Fleshner, Karen N Zaghiyan> ;Diseases of the Colon and Rectum. 2024 Apr 1
Pre-operative visceral adipose tissue radiodensity is a potentially novel prognostic biomarker for early endoscopic post-operative recurrence in Crohn's disease.
Phillip Gu, Shishir Dube, Norman Gellada, So Yung Choi, Susan Win, Yoo Jin Lee, Shaohong Yang, Talin Haritunians, Gil Y Melmed, Eric A Vasiliauskas, Niru Bonthala, Gau...> ;World Journal of Gastrointestinal Surgery. 2024 Mar 27
Risk Factors for Microscopic Disease Positivity at Ileocolic Resection Margins for Crohn's Disease.
Adam Truong, Jino Chough, Karen N Zaghiyan, Phillip R Fleshner> ;Surgical Technology International. 2024 Mar 12
Outcomes and endpoints of postoperative recurrence in Crohn's Disease: systematic review and consensus conference.
Hammoudi, N., Sachar, D., D'Haens, G., Reinisch, W., Kotze, P., Vermeire, S., Schölmerich, J., Kamm, M., Griffiths, A., Panes, J., Ghosh, S., Siegel, C., Bemelman, W.,...> ;Journal of Crohn's & Colitis. 2023 Dec 19
Comparative Persistence of Non-tumor Necrosis Factor (TNF) vs. TNF Antagonists for Post-operative Prophylaxis in Crohn's Disease (CD).
Phillip Gu, Shishir Dube, YooJin Lee, Shaohong Yang, Dalin Li, Talin Haritunians, Eric Vasiliauskas, Niru Bonthala, Gaurav Syal, Andres Yarur, David Ziring, Stephan Ta...> ;Digestive Diseases and Sciences. 2024 Jan 1
Effectiveness of Oral Tofacitinib in Chronic Pouchitis: A Prospective, Open-Label Pilot Study.
Gaurav Syal, Daniel S Mishkin, Andrea Banty, Susie Lee, Norma Fontelera, Melissa Hampton, David Ziring, Phillip R Fleshner, Gil Y Melmed> ;Inflammatory Bowel Diseases. 2023 Oct 28
Prospective Randomized Trial of Immediate Postoperative Use of Regular Diet Versus Clear Liquid Diet in Major Colorectal Surgery.
Lucille Y Yao, Aimee E Gough, Karen N Zaghiyan, Phillip R Fleshner> ;Diseases of the Colon and Rectum. 2023 Dec 1
Watchful Waiting After Radiological Guided Drainage of Intra-abdominal Abscess in Patients With Crohn's Disease Might Be Associated With Increased Rates of Stoma Const...
Alaa El-Hussuna, Casper Steenholdt, Mette Louise Merrild Karer, Natasja Nyggard Uldall Nielsen, Angela Mujukian, Phillip R Fleshner, Igors Iesalnieks, Nir Horesh, Uri ...> ;Crohn's & Colitis 360. 2023 Jul 1
2 citations
Management of Perianal Crohn's Disease.
Alyssa M Parian, Megan Obi, Phillip Fleshner, David A Schwartz> ;The American Journal of Gastroenterology. 2023 Aug 1
3 citations
Genetic coding variant in complement factor B (CFB) is associated with increased risk for perianal Crohn's disease and leads to impaired CFB cleavage and phagocytosis.
Marzieh Akhlaghpour, Talin Haritunians, Shyam K More, Lisa S Thomas, Dalton T Stamps, Shishir Dube, Dalin Li, Shaohong Yang, Carol J Landers, Emebet Mengesha, Hussein ...> ;Gut. 2023 Nov 1
1 citations
Long-term Outcomes and Factors Predicting Outcome of IPAA When Used Intentionally for Well-Defined Crohn's Disease.
Eyal Aviran, Dan Assaf, Karen Zaghiyan, Phillip Fleshner> ;Diseases of the Colon and Rectum. 2023 May 1
3 citations
Impact of postoperative telemedicine visit versus in-person visit on patient satisfaction: A randomized clinical trial.
Lucille Y Yao, Phillip R Fleshner, Karen N Zaghiyan> ;Surgery. 2023 Feb 1
2 citations
SupportiNg operAtive Photographic documentation in ileocolonic CROHN's disease surgery: The SNAPCROHN study.
Valerio Celentano, Michel Adamina, Antonino Spinelli, Phillip Fleshner, Gianluca Pellino, Michela Mineccia, Francesco Selvaggi, Magali Svrcek, Phil Tozer, Eloy Espin-B...> ;Colorectal Disease. 2023 Feb 1
Reply.
Benjamin L Cohen, Phillip Fleshner, Bruce E Sands> ;Gastroenterology. 2023 Feb 1
1 citations
High Complication Rate After Early Ileostomy Closure: Early Termination of the Short Versus Long Interval to Loop Ileostomy Reversal After Pouch Surgery Randomized Trial.
Jon D Vogel, Phillip R Fleshner, Stefan D Holubar, Vitaliy Y Poylin, Scott E Regenbogen, Brandon C Chapman, Evangelos Messaris, Matthew G Mutch, Neil H Hyman> ;Diseases of the Colon and Rectum. 2023 Feb 1
Feasibility of opioid-free surgery for inflammatory bowel disease.
Adam Truong, Lucille Yao, Phillip R Fleshner, Karen N Zaghiyan> ;Colorectal Disease. 2023 May 1
1 citations
Efficacy of Anal Sphincter Division During Fistulotomy in Anal Fissure-Associated Fistula.
Evan D Adams, James M Mirocha, Phillip R Fleshner, Karen N Zaghiyan> ;Diseases of the Colon and Rectum. 2023 May 1
Preoperative CT Indices Predict Nonreach Before IPAA.
Evan D Adams, Charlotte A Lansky, Cindy E Kallman, Karen N Zaghiyan, Phillip R Fleshner> ;Diseases of the Colon and Rectum. 2023 Nov 1
Predictive factors of first-time failure on the American Board of Colorectal Surgery certifying and qualifying examinations.
Lucas Fair, Benjamin Gough, Neil Hyman, Brian Bello, Randolph Steinhagen, Robert Cleary, Matthew Ziegler, Dipen Maun, Phillip Fleshner, Gerald Ogola, Katerina Wells, W...> ;Proceedings. 2023 Jan 1
Invited Commentary: Management of Anal Fistula with Ligation of Intersphincteric Fistula Tract vs Endorectal Advancement Flap.
Phillip Fleshner> ;Journal of the American College of Surgeons. 2023 Jan 1
2 citations
Effectiveness and Safety of Biologic Therapy in Hispanic Vs Non-Hispanic Patients With Inflammatory Bowel Diseases: A CA-IBD Cohort Study.
Nghia H Nguyen, Jiyu Luo, Paulina Paul, Jihoon Kim, Gaurav Syal, Christina Ha, Vivek Rudrapatna, Sunhee Park, Nimisha Parekh, Kai Zheng, Jenny S Sauk, Berkeley Limketk...> ;Clinical Gastroenterology and Hepatology. 2023 Jan 1
7 citations
Comparative Safety and Effectiveness of Biologic Therapy for Crohn's Disease: A CA-IBD Cohort Study.
Siddharth Singh, Jihoon Kim, Jiyu Luo, Paulina Paul, Vivek Rudrapatna, Sunhee Park, Kai Zheng, Gaurav Syal, Christina Ha, Phillip Fleshner, Dermot McGovern, Jenny S Sa...> ;Clinical Gastroenterology and Hepatology. 2023 Aug 1
Appropriateness of Medical and Surgical Treatments for Chronic Pouchitis Using RAND/UCLA Appropriateness Methodology.
Gaurav Syal, Miles P Sparrow, Fernando Velayos, Adam S Cheifetz, Shane Devlin, Peter M Irving, Gilaad G Kaplan, Laura E Raffals, Thomas Ullman, Krisztina B Gecse, Phil...> ;Digestive Diseases and Sciences. 2022 Oct 1
4 citations
Management of pouch neoplasia: consensus guidelines from the International Ileal Pouch Consortium.
Ravi P Kiran, Gursimran S Kochhar, Revital Kariv, Douglas K Rex, Akira Sugita, David T Rubin, Udayakumar Navaneethan, Tracy L Hull, Huaibin Mabel Ko, Xiuli Liu, Lisa A...> ;The Lancet. Gastroenterology & Hepatology. 2022 Sep 1
19 citations
CORE-IBD: A Multidisciplinary International Consensus Initiative to Develop a Core Outcome Set for Randomized Controlled Trials in Inflammatory Bowel Disease.
, Christopher Ma, Jurij Hanzel, Remo Panaccione, William J Sandborn, Geert R D'Haens, Vineet Ahuja, Raja Atreya, Charles N Bernstein, Peter Bossuyt, Brian Bressler, Ro...> ;Gastroenterology. 2022 Oct 1
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Press Mentions

Meet the 2021 Sherman Prize WinnersOctober 5th, 2021
The July Issue Is Out! Find Out the Top Reasons to Read the July Issue of Diseases of the Colon and RectumJune 21st, 2021
Sleep, Step Count Not Tied to IBD Patients' Post-Op LOSDecember 15th, 2019