Matthew Alan Chin, M.D.

NPI 1629397351ActiveIndividual· Internal Medicine, Gastroenterology· Walnut Creek, CA

Internal Medicine, Gastroenterology (M.D.) in Walnut Creek, California, trained at University of California, San Diego School of Medicine (class of 2010). Their prescriptions cost Medicare Part D more than their services did: $321,713 for 671 claims, against $189,874 paid for services in 2024. Abbvie Inc. was the largest of 3 companies reporting payments in 2025, $141.55 in all, mostly food and beverage.

Overview

NPI	1629397351
Status	Active
Entity type	Individual
Credential	M.D.
Sole proprietor	No
NPI issued	May 20, 2010
Last updated in NPPES	Feb 26, 2018

Specialties and licenses

Taxonomy	Code	License	State
Internal Medicine, Gastroenterology Primary	207RG0100X	A118529	CA

About license numbers in NPPES

Exclusion screening

List	Result	Details
HHS-OIG LEIE · Nov 10, 2026	No match	Checked by NPI and by name + state
North Carolina Medicaid · Nov 11, 2026	No match	—
New York OMIG · Nov 11, 2026	No match	—
Ohio Medicaid · Nov 11, 2026	No match	—
Pennsylvania Medicheck · Nov 11, 2026	No match	—
Washington HCA · Nov 11, 2026	No match	—

Official OIG search · How matching works ·Bulk check a roster

Medicare

Enrollment (PECOS)	Enrolled Practitioner - Gastroenterology (CA)
Accepts assignment	Yes (participating)

Medicare services in 2024

Medicare patients	566
Services billed	1,491 across 85 procedure codes
Paid by Medicare	$189,874

Part D prescriptions in 2024

Prescriptions (claims)	671 · 1,345 30-day fills
Patients	292
Total drug cost	$321,713
Generic share	82% of claims

Medicare sources and data years

Education and affiliations

Medical school	University of California, San Diego School of Medicine
Graduation year	2010
Medicare specialty	Gastroenterology
Secondary specialties	Infectious Disease
Telehealth	Offers telehealth