Gretchen Perilli, MD

NPI 1043306343ActiveIndividual· Internal Medicine, Endocrinology, Diabetes & Metabolism· Allentown, PA

Internal Medicine, Endocrinology, Diabetes & Metabolism (MD) in Allentown, Pennsylvania, trained at Jefferson Medical College of Thomas Jefferson University (class of 2001). Their prescriptions cost Medicare Part D more than their services did: $627,374 for 1,317 claims, against $68,728 paid for services in 2024. Tandem Diabetes Care, Inc. reported $15.31 in payments in 2025, mostly food and beverage.

Overview

NPI	1043306343
Status	Active
Entity type	Individual
Credential	MD
Sole proprietor	No
NPI issued	Oct 5, 2006
Last updated in NPPES	Mar 1, 2016

Specialties and licenses

Taxonomy	Code	License	State
Internal Medicine, Endocrinology, Diabetes & Metabolism Primary	207RE0101X	MD422829	PA

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 - Internal Medicine (PA)
Accepts assignment	Yes (participating)

Medicare services in 2024

Medicare patients	275
Services billed	2,679 across 22 procedure codes
Paid by Medicare	$68,728

Part D prescriptions in 2024

Prescriptions (claims)	1,317 · 3,348 30-day fills
Patients	204
Total drug cost	$627,374
Generic share	45% of claims

Medicare sources and data years

Education and affiliations

Medical school	Jefferson Medical College of Thomas Jefferson University
Graduation year	2001
Medicare specialty	Internal Medicine
Secondary specialties	Endocrinology
Telehealth	Offers telehealth