Mu-Chien Chiang, D.O.

NPI 1831322148ActiveIndividual· Internal Medicine· San Marino, CA

Internal Medicine (D.O.) in San Marino, California, trained at New York College of Osteo Medicine of New York Institute of Technology (class of 2006). Their prescriptions cost Medicare Part D more than their services did: $236,631 for 2,772 claims, against $52,412 paid for services in 2024. Novo Nordisk Inc was the largest of 3 companies reporting payments in 2025, $639.10 in all, mostly food and beverage.

Overview

NPI	1831322148
Status	Active
Entity type	Individual
Credential	D.O.
Sole proprietor	No
NPI issued	Sep 2, 2009
Last updated in NPPES	Dec 10, 2015

Specialties and licenses

Taxonomy	Code	License	State
Internal Medicine Primary	207R00000X	20A11321	CA

About license numbers in NPPES

Exclusion screening

List	Result	Details
HHS-OIG LEIE · Oct 9, 2026	No match	Checked by NPI and by name + state
North Carolina Medicaid · Nov 10, 2026	No match	—
New York OMIG · Nov 10, 2026	No match	—
Ohio Medicaid · Nov 10, 2026	No match	—
Pennsylvania Medicheck · Nov 10, 2026	No match	—
Washington HCA · Nov 10, 2026	No match	—

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

Medicare

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

Medicare services in 2024

Medicare patients	185
Services billed	676 across 24 procedure codes
Paid by Medicare	$52,412

Part D prescriptions in 2024

Prescriptions (claims)	2,772 · 6,750 30-day fills
Patients	351
Total drug cost	$236,631
Generic share	89% of claims

Medicare sources and data years

Education and affiliations

Medical school	New York College of Osteo Medicine of New York Institute of Technology
Graduation year	2006
Medicare specialty	Internal Medicine
Telehealth	Offers telehealth