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Gastroenterology in Los Angeles, California

Data updated monthly · Last refresh September 2026

195 Gastroenterology providers practice in Los Angeles, and 63% received drug or device company payments in 2025. Listings are drawn from federal public records and are not endorsements.

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. Jerome Goldwasser, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 652-4472
Dr. Jiaming Zhu, M.D.
Los Angeles, CA · $1,299 in drug and device payments (2025) · (323) 226-7556
Dr. Jihane Benhammou, B.S.
Los Angeles, CA · $588 in drug and device payments (2025) · (310) 208-5400
Dr. John Debanto, MD
Los Angeles, CA · $14 in drug and device payments (2025) · (678) 897-3726
Dr. John Kim, M.D.
Los Angeles, CA · $135 in drug and device payments (2025) · (323) 442-5100
Dr. John Lunn, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 825-6301
Dr. Jonathan Chang, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 819-2651
Dr. Jonathan Kaunitz, M.D.
Los Angeles, CA · $55 in drug and device payments (2025) · (310) 268-3879
Dr. Jonathan Pourmorady
Los Angeles, CA · $1,154 in drug and device payments (2025) · Telehealth · (310) 933-3229
Dr. Joseph Pisegna, MD
Los Angeles, CA · $42,267 in drug and device payments (2025) · Telehealth · (310) 794-9718
Dr. Kareem Sassi, M.D.
Los Angeles, CA · $333 in drug and device payments (2025) · Telehealth · (310) 825-6240
Dr. Karen Lindsay, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · (626) 457-5839
Dr. Karl Kwok, MD
Los Angeles, CA · $1,465 in drug and device payments (2025) · (800) 954-8000
Dr. Kenny Liu, MD
Los Angeles, CA · No drug or device payments recorded (2025) · Telehealth · (323) 783-4011
Dr. Kevin Ghassemi, M.D.
Los Angeles, CA · $292 in drug and device payments (2025) · Telehealth · (310) 208-5400
Dr. Kevin Horgan, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 794-9718
Dr. Khalid Al Shamousi, MD, FRCPC
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 423-8056
Dr. Kirsten Tillisch, MD
Los Angeles, CA · $125 in drug and device payments (2025) · (310) 208-5400
Dr. Laurie Deleve, M.D.
Los Angeles, CA · $4,250 in drug and device payments (2025) · Telehealth · (323) 442-5100
Dr. Lillian Du, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 423-4100
Dr. Lily Dara, M.D.
Los Angeles, CA · $10,022 in drug and device payments (2025) · Telehealth · (323) 442-5100
Dr. Lin Chang, MD
Los Angeles, CA · $8,218 in drug and device payments (2025) · Telehealth · (310) 825-1597
Dr. Ling Shao, M.D.,PH.D.
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 442-5100
Dr. Mamatha Sadda, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 967-1884
Dr. Marc Makhani, M.D.
Los Angeles, CA · $2,557 in drug and device payments (2025) · Telehealth · (310) 657-5244
Dr. Mark Ovsiowitz, MD
Los Angeles, CA · $206 in drug and device payments (2025) · Telehealth · (310) 825-9711
Dr. Mark Pimentel, M.D.
Los Angeles, CA · $4,558 in drug and device payments (2025) · Telehealth · (310) 423-6143
Dr. Marvin Perer, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 440-0375
Dr. Maurice Elihu, MD
Los Angeles, CA · No drug or device payments recorded (2025) · Telehealth · (310) 551-9900
Dr. Mehdi Mohamadnejad
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 267-9659
Dr. Mehrdad Vosoghi, M.D.
Los Angeles, CA · $1,043 in drug and device payments (2025) · Telehealth · (310) 556-7747
Dr. Michael Kline, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 442-5100
Dr. Michael Pimienta, MD
Los Angeles, CA · $1,775 in drug and device payments (2025) · (213) 977-4156
Dr. Minh Do, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 206-0449
Dr. Mitchell Spirt, M.D.
Los Angeles, CA · $1,025 in drug and device payments (2025) · Telehealth · (310) 551-0082
Dr. Mordecai Solomon, D.O.
Los Angeles, CA · $44 in drug and device payments (2025) · (213) 440-2040
Dr. Neel Mann, M.D.
Los Angeles, CA · $200 in drug and device payments (2025) · Telehealth · (323) 442-5100
Dr. Neil Sevy, MD
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 857-2000
Dr. Nicholas Karyotakis, MD
Los Angeles, CA · $1,707 in drug and device payments (2025) · Telehealth · (310) 282-0525
Dr. Nipaporn Pichetshote, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · Telehealth · (323) 442-5100
Dr. Nirupama Bonthala, MD
Los Angeles, CA · No drug or device payments recorded (2025) · Telehealth · (310) 208-5400
Dr. Noor Ali
Los Angeles, CA · No drug or device payments recorded (2025) · (323) 783-0141
Dr. Oliver Goldsmith, MD
Los Angeles, CA · No drug or device payments recorded (2025) · Telehealth · (323) 857-2000
Dr. Parviz Javdan, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · (310) 441-2000
Dr. Patrick Chang, MD
Los Angeles, CA · $329 in drug and device payments (2025) · (323) 442-5100
Dr. Patrick Takahashi, M.D.
Los Angeles, CA · No drug or device payments recorded (2025) · (213) 620-0822
Dr. Paul Leonor, M.D.
Los Angeles, CA · $1,841 in drug and device payments (2025) · (323) 226-7556
Dr. Paul Paik, MD
Los Angeles, CA · $144 in drug and device payments (2025) · (323) 409-1000
Dr. Paul Shao
Los Angeles, CA · $49,233 in drug and device payments (2025) · (626) 226-7096
Dr. Payman Khorrami, MD
Los Angeles, CA · $2,969 in drug and device payments (2025) · Telehealth · (310) 553-5588

Conditions Gastroenterology providers in Los Angeles, California commonly treat

Patients often search by condition rather than specialty. These are conditions typically managed by Gastroenterology providers. Individual practices vary, so confirm with the provider before booking.

Common questions

How many Gastroenterology providers are in Los Angeles, California?

There are 195 Gastroenterology providers with active NPI records practicing in Los Angeles, according to federal NPPES data refreshed monthly.

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

123 of 195 (63%) received at least one payment from a drug or device company in 2025, according to the federal Open Payments program.

What conditions do Gastroenterology providers in Los Angeles treat?

Gastroenterology providers in Los Angeles commonly treat acid reflux, IBS, Crohn disease, ulcerative colitis, celiac disease and related conditions. Individual practices vary, so confirm with the provider before booking.

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 Gastroenterology across California

Try a city like Tucson, a zip like 85016, or a specialty like psychiatry. For a doctor by name, use the full search.
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.