THOMAS KIRK O'BRIEN M.D.
NPI 1033188545
Internal Medicine in Ann Arbor, MI
About Thomas Kirk O'brien M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
THOMAS KIRK O'BRIEN M.D. (NPI 1033188545) is an individual internal medicine provider in Ann Arbor, Michigan, licensed in Michigan (406214) and active in the NPI registry since March 2006. He is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
Other Identifiers 1
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Thomas Kirk O'brien M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 48103 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 7
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Thomas O'brien's NPI number?
The NPI number for Thomas O'brien is 1033188545. It was assigned to this individual provider in the NPPES registry on March 16, 2006.
Where is Thomas O'brien located?
Thomas O'brien practices at 6276 Jackson Rd Suite B, Ann Arbor, MI 48103. The listed phone number is (734) 663-4490.
What is Thomas O'brien's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Thomas O'brien enrolled in Medicare?
Yes. Thomas O'brien is registered in the Medicare PECOS enrollment system.
When was this NPI record last updated?
The NPPES record for Thomas O'brien was last updated on July 13, 2026. NPI Profile syncs with the weekly NPPES data releases published by CMS.
