Keith Marcus, MD

NPI 1255371365ActiveIndividual· Internal Medicine· Ludington, MI

Internal Medicine (MD) in Ludington, Michigan, trained at University of Iowa, Rj & L Carver College of Medicine (class of 1985). In 2024 Medicare paid $18,214 for 110 patients, and Part D covered 357 of their prescriptions, 89% of them generic. Galderma Laboratories, L.P. was the largest of 3 companies reporting payments in 2025, $562.91 in all, mostly food and beverage.

Overview

NPI	1255371365
Status	Active
Entity type	Individual
Credential	MD
Sole proprietor	No
NPI issued	Jun 7, 2006
Last updated in NPPES	Mar 1, 2024
Certified by provider	Mar 1, 2024

Specialties and licenses

Taxonomy	Code	License	State
Internal Medicine Primary	207R00000X	4301050045	MI

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 - Hospitalist (MI)
Accepts assignment	Yes (participating)

Medicare services in 2024

Medicare patients	110
Services billed	245 across 12 procedure codes
Paid by Medicare	$18,214

Part D prescriptions in 2024

Prescriptions (claims)	357 · 382 30-day fills
Patients	118
Total drug cost	$15,886
Generic share	89% of claims

Medicare sources and data years

Education and affiliations

Medical school	University of Iowa, Rj & L Carver College of Medicine
Graduation year	1985
Medicare specialty	Hospitalist
Secondary specialties	Internal Medicine