Mark C. Fisher, MD, MPH

NPI 1932308244ActiveIndividual· Internal Medicine, Rheumatology· Boston, MA

Internal Medicine, Rheumatology (MD, MPH) in Boston, Massachusetts, trained at University of Pittsburgh School of Medicine (class of 2002). Their prescriptions cost Medicare Part D more than their services did: $3,526,982 for 7,004 claims, against $1,056,743 paid for services in 2024. Abbvie Inc. was the largest of 4 companies reporting payments in 2025, $273.76 in all, mostly food and beverage.

Overview

NPI	1932308244
Status	Active
Entity type	Individual
Credential	MD, MPH
Sole proprietor	No
NPI issued	Jul 16, 2007
Last updated in NPPES	Nov 22, 2013

Specialties and licenses

Taxonomy	Code	License	State
Internal Medicine, Rheumatology Primary	207RR0500X	239044	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 (MA); Practitioner - Rheumatology (RI)
Accepts assignment	Yes (participating)

Medicare services in 2024

Medicare patients	1,451
Services billed	75,183 across 103 procedure codes
Paid by Medicare	$1,056,743

Part D prescriptions in 2024

Prescriptions (claims)	7,004 · 9,521 30-day fills
Patients	905
Total drug cost	$3,526,982
Generic share	91% of claims

Medicare sources and data years

Education and affiliations

Medical school	University of Pittsburgh School of Medicine
Graduation year	2002
Medicare specialty	Rheumatology
Secondary specialties	Internal Medicine
Telehealth	Offers telehealth