Charles C. Tsai, M.D.

NPI 1609825082ActiveIndividual· Internal Medicine, Cardiovascular Disease· Modesto, CA

Internal Medicine, Cardiovascular Disease (M.D.) in Modesto, California, trained at University of Michigan Medical School (class of 1989). Their prescriptions cost Medicare Part D more than their services did: $1,605,288 for 7,077 claims, against $281,349 paid for services in 2024. Medtronic, Inc. was the largest of 8 companies reporting payments in 2025, $3,647 in all, mostly food and beverage.

Overview

NPI	1609825082
Status	Active
Entity type	Individual
Credential	M.D.
Sole proprietor	No
NPI issued	May 10, 2006
Last updated in NPPES	Feb 18, 2011

Specialties and licenses

Taxonomy	Code	License	State
Internal Medicine, Cardiovascular Disease Primary	207RC0000X	G84045	CA
Radiology, Therapeutic Radiology	2085R0203X	G84045	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 - Cardiovascular Disease (Cardiology) (CA)
Accepts assignment	Yes (participating)

Medicare services in 2024

Medicare patients	2,063
Services billed	4,801 across 91 procedure codes
Paid by Medicare	$281,349

Part D prescriptions in 2024

Prescriptions (claims)	7,077 · 18,143 30-day fills
Patients	972
Total drug cost	$1,605,288
Generic share	85% of claims

Medicare sources and data years

Education and affiliations

Medical school	University of Michigan Medical School
Graduation year	1989
Medicare specialty	Cardiovascular Disease (Cardiology)
Telehealth	Offers telehealth