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Dr. Stephen L. Simpson, M.D., P.C.

Specialist in Ayer, MA · enumerated 2008 · authorized official Sara Flannery, Office Manager.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1952579674

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Registry record

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 (978) 862-0025
Fax (978) 862-0049
Enumeration date Feb 15, 2008
Last updated in NPPES Dec 18, 2008

Taxonomy & classification

174400000X Specialist Other Service Providers · License 205051 (MA) Primary

Authorized official

Name Sara Flannery
Title Office Manager
Phone (978) 862-0025

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

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.

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Frequently asked questions

Where is Dr. Stephen L. Simpson, M.D., P.C. located?
The practice location on file with NPPES is in Ayer, MA.
How current is this record?
Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2008-12-18. Verify at npiregistry.cms.hhs.gov.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-12-18.