Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Dr. Thomas M. Brennan, DO

Individual provider Internal Medicine Physician · NPI 1174101620

Dr. Thomas M. Brennan, DO is an Internal Medicine in Erie, Pennsylvania. Graduated from Michigan State University College of Osteopathic Medicine in 2021, 5 years ago. Practices with Regional Health Services Inc, a 576-clinician group and accepts Medicare assignment. Licensed in Pennsylvania.

Years since qualifying
5
Trained at
Michigan State University College of Osteopathic Medicine
Licensed in
PA
In the registry since
2021
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

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Practice location Address checks out

201 State St
Erie, PA 16550-0002
Phone: (814) 877-4922
Fax: (814) 877-3622
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence OS023950 (PA)

Record details

NPI number1174101620
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedMarch 29, 2021
Last updated in NPPESAugust 1, 2024
Certification dateAugust 1, 2024
Mailing address201 State St, Erie, PA 16550-0002

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyINTERNAL MEDICINE
Medical schoolMICHIGAN STATE UNIVERSITY COLLEGE OF OSTEOPATHIC MEDICINE
Graduated 2021 (5 years in practice)
Group practice Regional Health Services Inc — 576 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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