Thomas B. Day, M.D.,P.A.
Thomas B. Day, M.D.,P.A. is a healthcare organization registered as Medical Specialty Clinic/Center in Windsor Mill, MD, holding Type 2 (organization) NPI 1689727240 since 2007. The authorized official on file is Thomas Day, President.
✓ Active NPI ✓ Valid NPI checksum
| NPI | 1689727240 |
|---|---|
| Entity type | Organization (Type 2) |
| Legal business name | Thomas B. Day, M.D.,P.A. |
| Practice address | 7001 JOHNNYCAKE RD STE 104, Windsor Mill, MD, 21244 |
| Phone | 4107474711 |
| Fax | 4107474766 |
| Enumeration date | 2007-01-18 |
| Last updated in NPPES | 2023-03-07 |
Authorized official
| Name | Thomas Day |
|---|---|
| Title | President |
| Phone | 4107474711 |
Taxonomy & classification
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 261QM2500X | Medical Specialty Clinic/Center | Primary | — | — |
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 5433193P0001 | Medicaid | MD | — |
| M11803 | Other | MD | CONTROL DRUG - MARYLAND |
Copy-ready billing details
Provider: Thomas B. Day, M.D.,P.A. NPI: 1689727240 Taxonomy: 261QM2500X (Medical Specialty Clinic/Center) Address: 7001 JOHNNYCAKE RD STE 104, Windsor Mill, MD, 21244
Providers at this address
| NPI | Name | Type | Specialty | Location |
|---|---|---|---|---|
| 1336112622 | Thomas Day | Individual | Dermatology Physician | Windsor Mill, MD |
| 1841922267 | Kennedy Onuoha | Individual | Behavior Technician | Windsor Mill, MD |
Verify this record
Cross-check NPI 1689727240 against the authoritative CMS record: view Thomas B. Day, M.D.,P.A. on the official NPPES registry .
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. Read the full guide or validate an NPI number.
Frequently asked questions
What is the NPI number for Thomas B. Day, M.D.,P.A.?
Who is the authorized official for Thomas B. Day, M.D.,P.A.?
Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2023-03-07.