Peter A. Merkel, MD, MPH

NPI 1437136173ActiveIndividual· Internal Medicine, Rheumatology· Radnor, PA

Internal Medicine, Rheumatology (MD, MPH) in Radnor, Pennsylvania, trained at Yale University School of Medicine (class of 1988). Their prescriptions cost Medicare Part D more than their services did: $45,601 for 48 claims, against $7,832 paid for services in 2024. Ns Pharma, Inc. was the largest of 13 companies reporting payments in 2025, $71,402 in all, mostly consulting fees.

Overview

NPI	1437136173
Status	Active
Entity type	Individual
Credential	MD, MPH
Sole proprietor	No
NPI issued	Dec 23, 2005
Last updated in NPPES	Feb 3, 2012

Specialties and licenses

Taxonomy	Code	License	State
Internal Medicine, Rheumatology Primary	207RR0500X	MD043272L	PA
Internal Medicine, Rheumatology	207RR0500X	75719	MA
Internal Medicine	207R00000X	75719	MA

About license numbers in NPPES

Exclusion screening

List	Result	Details
HHS-OIG LEIE · Oct 9, 2026	No match	Checked by NPI and by name + state
North Carolina Medicaid · Nov 10, 2026	No match	—
New York OMIG · Nov 10, 2026	No match	—
Ohio Medicaid · Nov 10, 2026	No match	—
Pennsylvania Medicheck · Nov 10, 2026	No match	—
Washington HCA · Nov 10, 2026	No match	—

Official OIG search · How matching works ·Bulk check a roster

Medicare

Enrollment (PECOS)	Enrolled Practitioner - Rheumatology (NJ); Practitioner - Rheumatology (PA)
Accepts assignment	Yes (participating)

Medicare services in 2024

Medicare patients	59
Services billed	163 across 9 procedure codes
Paid by Medicare	$7,832

Part D prescriptions in 2024

Prescriptions (claims)	48 · 88 30-day fills
Patients	20
Total drug cost	$45,601
Generic share	75% of claims

Medicare sources and data years

Education and affiliations

Medical school	Yale University School of Medicine
Graduation year	1988
Medicare specialty	Rheumatology
Secondary specialties	Internal Medicine
Telehealth	Offers telehealth