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Pediatric Gastroenterology in Los Angeles, California

Data updated monthly · Last refresh September 2026

46 Pediatric Gastroenterology providers practice in Los Angeles, and 52% received drug or device company payments in 2025. Listings are drawn from federal public records and are not endorsements.

Pediatric Gastroenterology providers in Los Angeles

Listed alphabetically. Payment figures come from the federal Open Payments program, which requires drug and device companies to report what they pay physicians for consulting, speaking, meals, travel and royalties. A disclosed payment is a financial relationship, not evidence of wrongdoing, and many totals reflect a single meal. Figures cover calendar year 2025.

Dr. Alvin Chan
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 825-0867
Dr. Ardath Yamaga, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 669-2181
Dr. Beth Carter, MD
Los Angeles, CA · $39 in drug and device payments (2025) · (888) 631-2452
Dr. Blake Rosenthal
Los Angeles, CA · $297 in drug and device payments (2025) · (323) 361-7798
Dr. Chuan Hao Lin, MD
Los Angeles, CA · $15 in drug and device payments (2025) · (323) 669-2181
Dr. David Ziring, M.D.
Los Angeles, CA · $48,865 in drug and device payments (2025) · (310) 206-6134
Dr. Elaheh Vahabnezhad, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 825-0867
Dr. Emily Whang, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 206-6134
Dr. Frank Sinatra, MD
Los Angeles, CA · $34 in drug and device payments (2025) · (323) 669-2181
Dr. Frederick Watanabe, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 783-4011
Dr. Hillel Naon, MD
Los Angeles, CA · $70 in drug and device payments (2025) · (323) 361-2181
Dr. Janice Bitong, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 825-0867
Dr. Jaya Punati, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 361-5924
Dr. Jessica Deas, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 660-2450
Dr. Johanna Ascher Bartlett, M.D.
Los Angeles, CA · $19 in drug and device payments (2025) · (323) 361-2181
Dr. Jorge Vargas, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 206-6136
Dr. Kattayoun Kordy, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 660-2450
Dr. Keith Hazleton, MD, PHD
Los Angeles, CA · $33 in drug and device payments (2025) · (323) 660-2450
Dr. Kimberly Silva, M.D.
Los Angeles, CA · $120 in drug and device payments (2025) · (310) 825-0867
Dr. Laura Wozniak, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 423-6082
Dr. Mallory Chavannes
Los Angeles, CA · $22,774 in drug and device payments (2025) · (438) 395-1651
Dr. Marjorie-anne Manchandia, M.D.
Los Angeles, CA · $34 in drug and device payments (2025) · (310) 825-0867
Dr. Martin Gilbert, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 783-4011
Dr. Martin Martin, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 206-3952
Dr. Marvin Ament, M.D.
Los Angeles, CA · $38 in drug and device payments (2025) · (310) 206-3952
Dr. Michelle Binod, MD, MPH
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 660-2450
Dr. Michelle Pietzak, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 361-2181
Dr. Omar Alharbi, M.D.
Los Angeles, CA · $1,350 in drug and device payments (2025) · (323) 361-2181
Dr. Parastou Khalessi Hosseini, DO
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 660-2450
Dr. Prashanthi Kandavel, M.D.
Los Angeles, CA · $54 in drug and device payments (2025) · (323) 361-2181
Dr. Quin Liu, M.D.
Los Angeles, CA · $354 in drug and device payments (2025) · Telehealth · (323) 361-5924
Dr. Rebecca Winderman, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (917) 671-8142
Dr. Robert Venick, M.D.
Los Angeles, CA · $4,840 in drug and device payments (2025) · (310) 206-6134
Dr. Rohit Kohli, MBBS, MS
Los Angeles, CA · $9,596 in drug and device payments (2025) · (323) 361-4100
Dr. Roy Nattiv, MD
Los Angeles, CA · $508 in drug and device payments (2025) · (310) 844-1194
Dr. Rula Harb, MD
Los Angeles, CA · $145 in drug and device payments (2025) · (323) 669-2181
Dr. Russell Merritt, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 361-5704
Dr. Saumya Pathak, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 206-6134
Dr. Shervin Rabizadeh, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 423-7100
Dr. Shreena Patel, MD
Los Angeles, CA · $49 in drug and device payments (2025) · (888) 631-2452
Dr. Shruti Nabar, MD
Los Angeles, CA · $298 in drug and device payments (2025) · (323) 660-2450
Dr. Sonia Michail, MD
Los Angeles, CA · $54 in drug and device payments (2025) · (323) 361-5924
Dr. Steven Kim, DO
Los Angeles, CA · $394 in drug and device payments (2025) · (323) 783-4976
Dr. Suzanne Mcdiarmid, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 825-0867
Dr. Vrinda Bhardwaj, M.D.
Los Angeles, CA · $48 in drug and device payments (2025) · (323) 361-6642
Dr. Yuhua Zheng
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 361-4456

Common questions

How many Pediatric Gastroenterology providers are in Los Angeles, California?

There are 46 Pediatric Gastroenterology providers with active NPI records practicing in Los Angeles, according to federal NPPES data refreshed monthly.

How many Pediatric Gastroenterology providers in Los Angeles received drug or device company payments?

24 of 46 (52%) received at least one payment from a drug or device company in 2025, according to the federal Open Payments program.

Where does this data come from?

Provider records come from the federal NPPES registry and CMS Doctors and Clinicians files. Payment figures come from the CMS Open Payments program for calendar year 2025. The directory refreshes monthly.

All specialties in Los Angeles Pediatric Gastroenterology across California

Sources: NPPES (CMS), Doctors and Clinicians national files, CMS Open Payments 2025. Updated monthly. Records are public federal data and are not verified credentials, licensure checks, or endorsements. This directory is informational and not medical advice. How we build this directory.