MarkPimentelMD

Gastroenterology • Los Angeles, CA

Associate Professor, Medicine, UCLA School of Medicine

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Office
8700 Beverly Blvd
Los Angeles, CA 90048
Phone+1 310-423-6143

Fax+1 310-423-8356

Education & Training

UCLA David Geffen School of Medicine/UCLA Medical CenterFellowship, Gastroenterology, 1996 - 1999
University of ManitobaClass of 1992

Certifications & Licensure

CA State Medical License 1996 - 2025

Awards, Honors, & Recognition

CMS Meaningful Use Stage 1 Certification EpicCare Ambulatory EMR, Epic Systems Corporation, 2013
Super Doctor SuperDoctors.com

Clinical Trials

Rifaximin for the Treatment of Irritable Bowel Syndrome Start of enrollment: 2003 Jul 01
Completed
Phase 2
Neomycin and Rifaximin Plus Neomycin in Treating Methane Positive Constipation Predominant Irritable Bowel Syndrome Start of enrollment: 2009 Aug 01
Completed
Not Applicable
Pilot of AbStats /AEGIS System for Detecting Motility Abnormalities Start of enrollment: 2013 Jul 01
Completed
Capillary Endoscopy Aspiration Catheter Start of enrollment: 2020 May 20
Recruiting
Not Applicable
Efficacy and Safety of Rifaximin With NAC in IBS-D Start of enrollment: 2020 Nov 13
Completed
Phase 1, Phase 2
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Publications & Presentations

PubMed

Third generation sequencing analysis detects significant differences in duodenal microbiome composition between functional dyspepsia patients and control subjects.
Georgios Tziatzios, Emmanouil Stylianakis, Georgia Damoraki, Paraskevas Gkolfakis, Gabriela Leite
Neurogastroenterology and Motility. 2025-01-01
Anti-CdtB and anti-vinculin antibodies to diagnose irritable bowel syndrome in inflammatory bowel disease patients.
Luisa Leite Barros, Gabriela Leite, Walter Morales, Gillian M Barlow, Matheus Freitas Cardoso de Azevedo
BMC Gastroenterology. 2024-12-03
Revisiting Meta-analyses of Placebo Response in Drug Trials for Irritable Bowel Syndrome: A Call to Disclose Excipients.
Jonathan A Busam, Ali Rezaie, Mark Pimentel
Clinical Gastroenterology and Hepatology. 2024-12-01

Journal Articles

Declining Rates of Referral for Irritable Bowel Syndrome Without Constipation at a Tertiary Care Center
Nipaporn Pichetshote, Vartan C Tashjian, Mark Pimentel, Ali Rezaie, Ruchi Mathur, Digestive Diseases and Sciences

Lectures

Influence of Dietary Restriction on Irritable Bowel Syndrome
Los Angeles, CA - 6/15/2014
Breath Testing
AGC 2018 Annual Scientific Meeting, Philadelphia, PA - 10/8/2018
Case-Based Functional GI Testing: Ask the Experts
AGC 2018 Annual Scientific Meeting, Philadelphia, PA - 10/8/2018

Press Mentions

IBS: Understanding a Common yet Misunderstood ConditionNovember 5th, 2024
Diabetes Drugs May Affect Endoscopy PatientsOctober 3rd, 2024
May Research Highlights: A Roundup of the Latest Medical Discoveries and Faculty News at Cedars-SinaiMay 26th, 2022
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Professional Memberships

Endocrine Society - ENDO
Member