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

Dr. Peter A Mosbach, PH.D.

Health Service Psychologist in Acton, MA · enumerated 2005 · practices at Pauline Gerson.

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

National Provider Identifier

1013904309

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Registry record

Entity type Individual (Type 1)

Name Dr. Peter A Mosbach

Credential PH.D.

Sex Male

Practice address Acton, MA, 01720

Phone (978) 635-0509

Fax (603) 415-3521

Enumeration date Sep 30, 2005

Last updated in NPPES Sep 11, 2025

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

Taxonomy & licenses

103TC0700X Clinical Psychologist Behavioral Health & Social Service Providers · License 4495 (MA) Secondary

103G00000X Clinical Neuropsychologist Behavioral Health & Social Service Providers · License 4495 (MA) Secondary

103TH0100X Health Service Psychologist Behavioral Health & Social Service Providers · License 4495 (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
0518107	Medicaid	MA	—

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 → Validate an NPI →

Frequently asked questions

Where does Peter Mosbach practice?

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

What is the NPI number for Peter Mosbach?

The National Provider Identifier (NPI) for Peter Mosbach is 1013904309, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

Browse all →

Ward Bein Psychiatry Physician · Acton, MA NPI 1710925011 Pauline Gerson Clinical Psychologist · Acton, MA NPI 1932147261 Sherri Kauderer Clinical Psychologist · Acton, MA NPI 1699714345 Cynthia Adamski Clinical Social Worker · Acton, MA NPI 1982620696 Joseph Fitzpatrick Chiropractor · Acton, MA NPI 1467525147 Kathleen Finn Clinical Psychologist · Acton, MA NPI 1811063266 Pauline Gerson Psychiatry Physician · Acton, MA NPI 1801957071 Marc Berger Clinical Psychologist · Acton, MA NPI 1386793743

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-09-11.