Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. Stephen Cobb Fisher, PHD

Psychologist in Westford, MA · enumerated 2005.

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

National Provider Identifier

1336131663

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Registry record

Entity type Individual (Type 1)

Name Dr. Stephen Cobb Fisher

Credential PHD

Sex Male

Practice address Westford, MA, 01886

Phone (978) 846-1572

Fax (978) 654-6650

Enumeration date Aug 23, 2005

Last updated in NPPES Mar 9, 2021

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

103T00000X Psychologist Behavioral Health & Social Service Providers · License 3368 (MA) Primary

PHD · Doctor of Philosophy: A doctoral degree; in healthcare often held by clinical psychologists and researchers. About the PHD credential

Other identifiers

Identifier	Type	State	Issuer
1670186	Other	-	PRIVATE HEALTH SYSTEMS
730960	Other	-	TUFTS HMO
5333043	Other	-	HEALTHCARE VALUE MANAGEME
1164138	Other	-	FIRST HEALTH
5656232	Other	-	AETNA
211025	Other	-	MAGELLAN BEHAVIORAL HEALT
W03424	Other	-	BLUE CROSS/BLUE SHIELD

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 does Stephen Fisher practice?

The practice location on file with NPPES is in Westford, MA. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Stephen Fisher?

The National Provider Identifier (NPI) for Stephen Fisher is 1336131663, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-03-09.