Internal Medicine - Gastroenterology Specialists in Lancaster, CA
Browse 13 Internal Medicine - Gastroenterology providers listed in NPPES with a practice address in Lancaster, California.
How Lancaster compares with the U.S.
Lancaster has 7.7 clinicians in Internal Medicine - Gastroenterology per 100,000 residents, 24% higher than the U.S. rate of 6.2.
That is 13 active clinicians in Internal Medicine - Gastroenterology with a practice address in Lancaster, for a population of 169,169.
The California rate is 5.4 per 100,000 residents.
What these numbers mean
Clinicians per 100,000 residents compares places of different sizes. We count active clinicians who list a practice address in the area in the federal NPI registry (NPPES) and divide by the number of people who live there, according to the U.S. Census Bureau. The U.S. rate is the same calculation for the whole country.
A higher number does not mean it is easier to get an appointment, that wait times are shorter, or that care is better. It also does not show how many clinicians are accepting new patients or which insurance plans they take. A lower number does not by itself mean there is a shortage.
City counts use the city name in each clinician's practice address. That postal city can cover a larger or smaller area than the city limits the Census Bureau uses for population, and many clinicians list only one address even if they work in several places.
Too few clinicians in Internal Medicine - Gastroenterology in Lancaster are listed in the CMS Medicare file to report Medicare assignment or telehealth shares.
These figures summarize public federal data. They do not measure quality of care, appointment availability, or whether a clinician accepts your insurance or new patients. Registry addresses can be out of date. Please confirm details directly with the office and your plan. This information is not medical advice.
Prepared by T-MedInfo from NPPES, CMS and U.S. Census Bureau data. Questions or corrections: support@true-medinfo.com · Methodology
Sources: Clinician counts and practice addresses: NPPES NPI Registry, Centers for Medicare & Medicaid Services (CMS), data as of August 2026. Population: U.S. Census Bureau, American Community Survey 2020-2024 5-Year Estimates, Table B01003 (Total Population).
Dr. Prithviraj Dharmaraja , MD
Internal Medicine - Gastroenterology
Dr. William Ang Go , MD
Internal Medicine - Gastroenterology
Dr. Sethu V. Madhavan , MD
Internal Medicine - Gastroenterology
Dr. Ramanbhai M Patel , MD
Internal Medicine - Gastroenterology
Dr. Kumaravel Perumalsamy , MD
Internal Medicine - Gastroenterology
Dr. Jatinder S. Pruthi , MD
Internal Medicine - Gastroenterology
Dr. Gurcharn Singh , MD
Internal Medicine - Gastroenterology
Dr. Shelly Singh , DO
Internal Medicine - Gastroenterology
Dr. Duminda Bernard Suraweera , MD
Internal Medicine - Gastroenterology
Dr. Vivaik Tyagi , MD
Internal Medicine - Gastroenterology
Dr. Edward Tze Wong , MD
Internal Medicine - Gastroenterology
Dr. Taha Hamoui , MD
Internal Medicine - Gastroenterology
Dr. Canagartnam Pathmarajah , MD
Internal Medicine - Gastroenterology
Frequently Asked Questions about Internal Medicine - Gastroenterology in Lancaster
Each practitioner profile shows the NUCC taxonomy code and any state license number the practitioner reported to NPPES, plus a link to the California licensing board lookup. NPPES entries are self-reported; current license status is published only by the state board.
This list shows NPI records that are active in NPPES. A deactivated NPI keeps its profile with the deactivation date and practice history; find it with the site search by name or NPI number.
Other Specialties in Lancaster
Internal Medicine - Gastroenterology Specialists in Other California Cities
Cities with the most listed practitioners first.