Gretchen Kunitz, MD

NPI 1144406273ActiveIndividual· Internal Medicine· Walnut Creek, CA

Internal Medicine (MD) in Walnut Creek, California, trained at University of California, San Francisco School of Medicine (class of 1980). 106 Medicare patients in 2024, $18,149 paid; nearly all of their 143 Part D prescriptions were generic (92%). Exact Sciences Corporation was the largest of 4 companies reporting payments in 2025, $94.14 in all, mostly food and beverage.

Overview

NPI	1144406273
Status	Active
Entity type	Individual
Credential	MD
Sole proprietor	No
NPI issued	Jan 18, 2008
Last updated in NPPES	Jun 18, 2015

Specialties and licenses

Taxonomy	Code	License	State
Internal Medicine Primary	207R00000X	G47367	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 - Internal Medicine (CA)
Accepts assignment	Yes (participating)

Medicare services in 2024

Medicare patients	106
Services billed	182 across 19 procedure codes
Paid by Medicare	$18,149

Part D prescriptions in 2024

Prescriptions (claims)	143 · 252 30-day fills
Patients	81
Total drug cost	$8,650
Generic share	92% of claims

Medicare sources and data years

Education and affiliations

Medical school	University of California, San Francisco School of Medicine
Graduation year	1980
Medicare specialty	Internal Medicine
Telehealth	Offers telehealth