Thomas M. Oconnor, DO

NPI 1144213992ActiveIndividual· Surgery, Vascular Surgery· Lancaster, PA

Surgery, Vascular Surgery (DO) in Lancaster, Pennsylvania, trained at New York College of Osteo Medicine of New York Institute of Technology (class of 1987). 551 Medicare patients in 2024, $129,376 paid; nearly all of their 393 Part D prescriptions were generic (98%). W. L. Gore & Associates, Inc. was the largest of 2 companies reporting payments in 2025, $122.21 in all, mostly food and beverage.

Overview

NPI	1144213992
Status	Active
Entity type	Individual
Credential	DO
Sole proprietor	No
NPI issued	Aug 26, 2005
Last updated in NPPES	Jun 6, 2025
Certified by provider	Jun 6, 2025

Specialties and licenses

Taxonomy	Code	License	State
Surgery, Vascular Surgery Primary	2086S0129X	OS009572L	PA
Surgery	208600000X	OS009572L	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 - Vascular Surgery (PA)
Accepts assignment	Yes (participating)

Medicare services in 2024

Medicare patients	551
Services billed	1,164 across 103 procedure codes
Paid by Medicare	$129,376

Part D prescriptions in 2024

Prescriptions (claims)	393 · 489 30-day fills
Patients	142
Total drug cost	$11,614
Generic share	98% of claims

Medicare sources and data years

Education and affiliations

Medical school	New York College of Osteo Medicine of New York Institute of Technology
Graduation year	1987
Medicare specialty	Vascular Surgery
Secondary specialties	General Surgery, Thoracic Surgery
Telehealth	Offers telehealth