Marc D. Feldman, MD

NPI 1083721070ActiveIndividual· Internal Medicine, Interventional Cardiology· San Antonio, TX

Internal Medicine, Interventional Cardiology (MD) in San Antonio, Texas, trained at Perelman School of Med at the University of Pennsylvania (class of 1981). Their prescriptions cost Medicare Part D more than their services did: $168,839 for 952 claims, against $104,361 paid for services in 2024. Altathera Pharmaceuticals LLC reported $20.96 in payments in 2025, mostly food and beverage.

Overview

NPI	1083721070
Status	Active
Entity type	Individual
Credential	MD
Sole proprietor	No
NPI issued	Aug 24, 2006
Last updated in NPPES	Aug 22, 2022
Certified by provider	Aug 22, 2022

Specialties and licenses

Taxonomy	Code	License	State
Internal Medicine, Interventional Cardiology Primary	207RI0011X	K6581	TX
Internal Medicine, Cardiovascular Disease	207RC0000X	DR.0058905	CO
Internal Medicine, Cardiovascular Disease	207RC0000X	K6581	TX

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 (TX)
Accepts assignment	Yes (participating)

Medicare services in 2024

Medicare patients	434
Services billed	1,173 across 60 procedure codes
Paid by Medicare	$104,361

Part D prescriptions in 2024

Prescriptions (claims)	952 · 2,502 30-day fills
Patients	160
Total drug cost	$168,839
Generic share	83% of claims

Medicare sources and data years

Education and affiliations

Medical school	Perelman School of Med at the University of Pennsylvania
Graduation year	1981
Medicare specialty	Interventional Cardiology
Secondary specialties	Cardiovascular Disease (Cardiology)