David S. Marks, MD

NPI 1164460010ActiveIndividual· Internal Medicine, Interventional Cardiology· Milwaukee, WI

Internal Medicine, Interventional Cardiology (MD) in Milwaukee, Wisconsin, trained at University of California, San Francisco School of Medicine (class of 1989). Their prescriptions cost Medicare Part D more than their services did: $202,555 for 1,051 claims, against $22,026 paid for services in 2024. Abbott Laboratories was the largest of 3 companies reporting payments in 2025, $2,924 in all, mostly consulting fees.

Overview

NPI	1164460010
Status	Active
Entity type	Individual
Credential	MD
Sole proprietor	No
NPI issued	Jun 3, 2006
Last updated in NPPES	Sep 25, 2017

Specialties and licenses

Taxonomy	Code	License	State
Internal Medicine, Interventional Cardiology Primary	207RI0011X	42189	WI
Internal Medicine, Cardiovascular Disease	207RC0000X	42189	WI

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 - Interventional Cardiology (WI)
Accepts assignment	Yes (participating)

Medicare services in 2024

Medicare patients	149
Services billed	296 across 32 procedure codes
Paid by Medicare	$22,026

Part D prescriptions in 2024

Prescriptions (claims)	1,051 · 2,805 30-day fills
Patients	214
Total drug cost	$202,555
Generic share	86% of claims

Medicare sources and data years

Education and affiliations

Medical school	University of California, San Francisco School of Medicine
Graduation year	1989
Medicare specialty	Interventional Cardiology
Secondary specialties	Cardiovascular Disease (Cardiology)
Telehealth	Offers telehealth