Dr. Stephen L. Simpson, M.D., P.C.
Dr. Stephen L. Simpson, M.D., P.C. is a healthcare organization registered as Specialist in Ayer, MA, holding Type 2 (organization) NPI 1952579674 since 2008. The authorized official on file is Sara Flannery, Office Manager.
✓ Active NPI ✓ Valid NPI checksum
| NPI | 1952579674 |
|---|---|
| Entity type | Organization (Type 2) |
| Legal business name | Dr. Stephen L. Simpson, M.D., P.C. |
| Practice address | 198 GROTON RD, SUITE 1, Ayer, MA, 01432 |
| Phone | 9788620025 |
| Fax | 9788620049 |
| Enumeration date | 2008-02-15 |
| Last updated in NPPES | 2008-12-18 |
Authorized official
| Name | Sara Flannery |
|---|---|
| Title | Office Manager |
| Phone | 9788620025 |
Taxonomy & classification
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 174400000X | Specialist | Primary | 205051 | MA |
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 103355800 | Other | MA | ACS |
| J22501 | Other | MA | BCBS |
| 0101877 | Medicaid | MA | — |
| 6919759006 | Other | MA | CIGNA |
| 408251 | Other | MA | TUFTS |
| 48317 | Other | MA | FALLON |
| 2430200 | Other | MA | AETNA |
| 0900631 | Other | MA | UNITED HEALTH |
| 172414 | Other | MA | HARVARD PILGRIM |
Copy-ready billing details
Provider: Dr. Stephen L. Simpson, M.D., P.C. NPI: 1952579674 Taxonomy: 174400000X (Specialist) Address: 198 GROTON RD, SUITE 1, Ayer, MA, 01432
Providers at this address
| NPI | Name | Type | Specialty | Location |
|---|---|---|---|---|
| 1154322964 | Stephen Simpson | Individual | Specialist | Ayer, MA |
| 1922367168 | Longwood Academic Physicians, LLC | Organization | Cardiovascular Disease Physician | Ayer, MA |
Verify this record
Cross-check NPI 1952579674 against the authoritative CMS record: view Dr. Stephen L. Simpson, M.D., P.C. 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
Where is Dr. Stephen L. Simpson, M.D., P.C. located?
How current is this record?
Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2008-12-18.