Thomas Mahl, MD

NPI 1780633412ActiveIndividual· Internal Medicine, Gastroenterology· Buffalo, NY

Internal Medicine, Gastroenterology (MD) in Buffalo, New York, trained at State University of New York at Buffalo School of Medicine (class of 1984). Their prescriptions cost Medicare Part D more than their services did: $358,203 for 292 claims, against $6,593 paid for services in 2024. Janssen Biotech, Inc. was the largest of 2 companies reporting payments in 2025, $254.40 in all, mostly food and beverage.

Overview

NPI	1780633412
Status	Active
Entity type	Individual
Credential	MD
Sole proprietor	No
NPI issued	May 9, 2006
Last updated in NPPES	Dec 1, 2011

Specialties and licenses

Taxonomy	Code	License	State
Internal Medicine, Gastroenterology Primary	207RG0100X	164933	NY

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 - Gastroenterology (NY)
Accepts assignment	Yes (participating)

Medicare services in 2024

Medicare patients	53
Services billed	79 across 15 procedure codes
Paid by Medicare	$6,593

Part D prescriptions in 2024

Prescriptions (claims)	292 · 504 30-day fills
Patients	63
Total drug cost	$358,203
Generic share	83% of claims

Medicare sources and data years

Education and affiliations

Medical school	State University of New York at Buffalo School of Medicine
Graduation year	1984
Medicare specialty	Gastroenterology
Secondary specialties	Internal Medicine