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Gastroenterologists in California

Data updated monthly · Last refresh October 2026

2,135 Gastroenterology providers practice in California, including 918 (43%) offering telehealth. The largest concentration is in Los Angeles. Profiles include federal Open Payments records of money received from drug and device companies in 2025. Listings are drawn from federal public records and are not endorsements.

2,135providers
918telehealth
Los Angelestop city

Gastroenterology by city in California

Choose a city to see providers there.

Gastroenterology in Los Angeles195 providers
Gastroenterology in San Diego126 providers
Gastroenterology in San Francisco103 providers
Gastroenterology in Sacramento89 providers
Gastroenterology in Stanford63 providers
Gastroenterology in San Jose46 providers
Gastroenterology in Orange45 providers
Gastroenterology in Torrance44 providers
Gastroenterology in Fresno41 providers
Gastroenterology in La Jolla36 providers
Gastroenterology in Loma Linda33 providers
Gastroenterology in Walnut Creek33 providers
Gastroenterology in Palo Alto29 providers
Gastroenterology in Oakland27 providers
Gastroenterology in Fremont26 providers
Gastroenterology in Santa Monica26 providers
Gastroenterology in West Hollywood26 providers
Gastroenterology in Anaheim25 providers
Gastroenterology in Newport Beach23 providers
Gastroenterology in Beverly Hills23 providers
Gastroenterology in Riverside22 providers
Gastroenterology in Irvine22 providers
Gastroenterology in Modesto21 providers
Gastroenterology in Santa Rosa19 providers

Gastroenterology providers in California

Listed by city, largest first. 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. Maria Sandra Umali, M.D.
Newhall, CA · No drug or device payments recorded (2025) · (661) 964-0597
Dr. Michael Jean, MD
Newhall, CA · No drug or device payments recorded (2025) · (661) 799-0615
Dr. Michael Quon, M.D.
Newhall, CA · No drug or device payments recorded (2025) · Telehealth · (661) 799-0615
Dr. Rajinder Kaushal, M.D.
Newhall, CA · No drug or device payments recorded (2025) · (661) 799-0615
Dr. Abhay Parikh, MD
Newport Beach, CA · $2,065 in drug and device payments (2025) · Telehealth · (949) 548-6652
Dr. Angizeh Sadeghi, MD
Newport Beach, CA · $514 in drug and device payments (2025) · Telehealth · (949) 404-4444
Dr. Brett Hughes, MD
Newport Beach, CA · $1,314 in drug and device payments (2025) · Telehealth · (949) 650-5155
Dr. Christopher Lee, MD
Newport Beach, CA · $6,319 in drug and device payments (2025) · Telehealth · (949) 645-6244
Dr. Daniel Koerber, MD
Newport Beach, CA · No drug or device payments recorded (2025) · (949) 764-4624
Dr. Donald Abrahm, M.D.
Newport Beach, CA · $2,638 in drug and device payments (2025) · Telehealth · (949) 631-2670
Dr. Glenn Madokoro, M.D.
Newport Beach, CA · No drug or device payments recorded (2025) · (949) 548-8800
Dr. Homeira Mehrabian, MD
Newport Beach, CA · $477 in drug and device payments (2025) · Telehealth · (949) 645-8300
Dr. Jennifer Phan
Newport Beach, CA · $31,423 in drug and device payments (2025) · (949) 764-6943
Dr. Kathryn Ross, M.D.
Newport Beach, CA · No drug or device payments recorded (2025) · (949) 650-8700
Dr. Kenneth J Chang, MD
Newport Beach, CA · $214,563 in drug and device payments (2025) · (949) 764-8959
Dr. Linda Anh Nguyen, M.D.
Newport Beach, CA · $26,625 in drug and device payments (2025) · Telehealth · (949) 764-7569
Dr. Norman Bain, MD
Newport Beach, CA · No drug or device payments recorded (2025) · (949) 760-0398
Dr. Parminder Dhaliwal, MD
Newport Beach, CA · $2,242 in drug and device payments (2025) · Telehealth · (949) 650-6731
Dr. Patricia Tsai, M.D.
Newport Beach, CA · $5,208 in drug and device payments (2025) · Telehealth · (949) 650-4630
Dr. Paul Korc, MD, INC.
Newport Beach, CA · $3,767 in drug and device payments (2025) · Telehealth · (949) 764-5760
Dr. Peter Broekelschen, MD
Newport Beach, CA · No drug or device payments recorded (2025) · (949) 759-1042
Dr. Phuong Nguyen, M.D.
Newport Beach, CA · $2,234 in drug and device payments (2025) · Telehealth · (949) 764-5760
Dr. Ravi Kankotia, M.D.
Newport Beach, CA · $3,920 in drug and device payments (2025) · Telehealth · (949) 764-5760
Dr. Richard Quist, M.D.
Newport Beach, CA · $4,168 in drug and device payments (2025) · Telehealth · (949) 645-8300
Dr. Roxanne Lim, MD
Newport Beach, CA · $3,217 in drug and device payments (2025) · Telehealth · (949) 760-0398
Dr. Shahla Rah, M.D.
Newport Beach, CA · No drug or device payments recorded (2025) · (949) 650-6700
Dr. Surinder Saini, M.D.
Newport Beach, CA · $38 in drug and device payments (2025) · Telehealth · (949) 650-5155
Dr. Niharika Mallepally, MD MPH
North Hollywood, CA · $91 in drug and device payments (2025) · Telehealth · (818) 843-9038
Dr. Shida Haghighat, MD
North Hollywood, CA · $226 in drug and device payments (2025) · Telehealth · (818) 843-9038
Dr. Daniel Eshaghian, D.O.
Northridge, CA · $1,236 in drug and device payments (2025) · Telehealth · (818) 280-5961
Dr. Gustavo Machicado, MD
Northridge, CA · $536 in drug and device payments (2025) · (818) 885-6261
Dr. Hrair Aharonian, M.D.
Northridge, CA · No drug or device payments recorded (2025) · (818) 368-2166
Dr. Jay Krishnan, M.D
Northridge, CA · $195 in drug and device payments (2025) · (818) 538-2562
Dr. Mark Tsai, M.D.
Northridge, CA · $20 in drug and device payments (2025) · (818) 772-2798
Dr. Piyush Jogani, MD
Northridge, CA · $253 in drug and device payments (2025) · (818) 885-9200
Dr. Suhail Salem, M.D.
Northridge, CA · $1,187 in drug and device payments (2025) · Telehealth · (818) 280-5961
Dr. Shahin Laghaee, MD
Oakdale, CA · $673 in drug and device payments (2025) · (209) 575-4575
Dr. Ayesha Zahiruddin, MD
Oakland, CA · $487 in drug and device payments (2025) · (510) 437-4800
Dr. Charles Wang, MD
Oakland, CA · No drug or device payments recorded (2025) · (916) 784-4000
Dr. Cynthia Morton, MD
Oakland, CA · No drug or device payments recorded (2025) · (510) 752-1000
Dr. Danny Wu, MD
Oakland, CA · No drug or device payments recorded (2025) · (510) 444-3297
Dr. Earl Darby, MD
Oakland, CA · No drug or device payments recorded (2025) · (510) 444-3297
Dr. Eddie Cheung, MD
Oakland, CA · No drug or device payments recorded (2025) · (510) 654-5555
Dr. Hank Wang, MD
Oakland, CA · No drug or device payments recorded (2025) · (510) 752-1000
Dr. John Roark, MD
Oakland, CA · No drug or device payments recorded (2025) · (510) 589-8774
Dr. Kevin Kane
Oakland, CA · $1,134 in drug and device payments (2025) · Telehealth · (510) 444-3297
Dr. Kimberly Cusato, MD
Oakland, CA · No drug or device payments recorded (2025) · (510) 752-1000
Dr. Laura Pace, M.D., PH.D.
Oakland, CA · $157 in drug and device payments (2025) · (801) 688-8636
Dr. Lawrence Ku, MD
Oakland, CA · $42 in drug and device payments (2025) · (510) 752-1282
Dr. Liana Vesga, MD
Oakland, CA · $3,069 in drug and device payments (2025) · Telehealth · (510) 444-3297

Conditions Gastroenterology providers in 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 California?

There are 2,135 Gastroenterology providers with active NPI records practicing in California, according to federal NPPES data refreshed monthly.

Do Gastroenterology providers in California offer telehealth?

Yes. 918 of the 2,135 Gastroenterology providers in California (about 43%) report offering telehealth services in CMS data.

Which cities in California have the most Gastroenterology providers?

Los Angeles (195), San Diego (126), San Francisco (103) have the highest concentration of Gastroenterology providers in California.

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

1,329 of 2,135 Gastroenterology providers in California (62%) 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 California treat?

Gastroenterology providers 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 counts and profiles 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.

Do most Gastroenterologists in California work in independent practices or large health systems?

Among 1,498 Gastroenterologists in California enrolled in Medicare, 21% bill through a solo or small practice with fewer than 10 clinicians, 8% through a mid-size group of 10 to 99, and 71% through a large group or health system with 100 or more clinicians, according to CMS enrollment records.

Which hospitals do Gastroenterologists in California work at?

According to CMS facility affiliation records, the California hospitals where the most Gastroenterologists hold privileges are Stanford Health Care in Stanford; Ronald Reagan UCLA Medical Center in Los Angeles; Cedars-Sinai Medical Center in Los Angeles.

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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. Are you a Gastroenterology in California? Get featured.