Gastroenterology in Lancaster, California
Data updated monthly · Last refresh September 2026
13 Gastroenterology providers practice in Lancaster. Listings are drawn from federal public records and are not endorsements.
Gastroenterology providers in Lancaster
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. Canagartnam Pathmarajah, M.D.Lancaster, CA · $146 in drug and device payments (2025) ·
(661) 948-0803 Dr. Duminda Suraweera, M.D.Lancaster, CA · $644 in drug and device payments (2025) · Telehealth ·
(661) 529-7550 Dr. Edward Wong, M.D.Lancaster, CA · $42 in drug and device payments (2025) ·
(661) 945-1874 Dr. Gurcharn Singh, MDLancaster, CA · No drug or device payments recorded (2025) ·
(661) 726-2500 Dr. Jatinder Pruthi, M.D.Lancaster, CA · $23,490 in drug and device payments (2025) · Telehealth ·
(661) 948-0803 Dr. Kumaravel Perumalsamy, M.D.Lancaster, CA · $9,066 in drug and device payments (2025) · Telehealth ·
(661) 529-7550 Dr. Prithviraj Dharmaraja, M.D.Lancaster, CA · $1,165 in drug and device payments (2025) · Telehealth ·
(661) 529-7550 Dr. Ramanbhai Patel, M.D.Lancaster, CA · No drug or device payments recorded (2025) ·
(661) 948-0803 Dr. Sethu Madhavan, MDLancaster, CA · No drug or device payments recorded (2025) ·
(661) 945-7181 Dr. Shelly Singh, D.O.Lancaster, CA · No drug or device payments recorded (2025) ·
(661) 945-7853 Dr. Taha Hamoui, MDLancaster, CA · No drug or device payments recorded (2025) ·
(661) 949-5901 Dr. Vivaik Tyagi, M.D.Lancaster, CA · $1,148 in drug and device payments (2025) · Telehealth ·
(661) 529-7550 Dr. William Go, M.D.Lancaster, CA · No drug or device payments recorded (2025) · Telehealth ·
(661) 726-2226 Conditions Gastroenterology providers in Lancaster, 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.
- Acid reflux
- IBS
- Crohn disease
- Ulcerative colitis
- Celiac disease
- Colon cancer screening
Common questions
How many Gastroenterology providers are in Lancaster, California?There are 13 Gastroenterology providers with active NPI records practicing in Lancaster, according to federal NPPES data refreshed monthly.
What conditions do Gastroenterology providers in Lancaster treat?Gastroenterology providers in Lancaster 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 Lancaster Gastroenterology across California
