Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Thomas J Oneil, DO
Neurology Physician in Warren, MI · enumerated 2005.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1023090552
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Registry record
Entity type Individual (Type 1)
Name Thomas J Oneil
Credential DO
Sex Male
Practice address 27427 Schoenherr Rd, Ste 100, Warren, MI, 48088
Phone (586) 756-5500
Fax (586) 756-5511
Enumeration date Nov 18, 2005
Last updated in NPPES Dec 20, 2022
Taxonomy & licenses
2084N0400X Neurology Physician Allopathic & Osteopathic Physicians · License 5101008653 (MI) Primary
DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD.
About the DO credential
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 431306811 | Medicaid | MI | - |
| 435177511 | Medicaid | MI | - |
What is an NPI number?
A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.
Frequently asked questions
What is the NPI number for Thomas Oneil?
The National Provider Identifier (NPI) for Thomas Oneil is 1023090552, a Type 1 (individual) record in the CMS NPPES registry.
Where does Thomas Oneil practice?
The practice location on file with NPPES is in Warren, MI. Providers can have multiple locations; NPPES lists the primary practice address.
Other providers at this practice address
Browse all → Assured Health Care Services, Inc. Home Health Agency · Warren, MI NPI 1265439913 Chakrapani Ranganathan Neurology Physician · Warren, MI NPI 1194709584 Darlene Swiderski Rehabilitation Psychologist · Warren, MI NPI 1356391304 Julie Henry-Kelly Orthopaedic Surgery Physician · Warren, MI NPI 1013951953 Julie L. Henry, M.D, P.C. Sports Medicine (Neuromusculoskeletal Medicine) Physician · Warren, MI NPI 1881734143 Rehabilitation Specialists of Livingston County, Inc. Physical Therapist · Warren, MI NPI 1780711861 Allen Denys Sleep Medicine (Internal Medicine) Physician · Warren, MI NPI 1386847507
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-12-20.