Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

William Anthony Mahoney, D.MIN., LMFT

Marriage & Family Therapist in Andover, MA · enumerated 2008 · practices at Optum Behavioral Care of Connecticut, P.C..

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

National Provider Identifier

1639323298

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Registry record

Entity type Individual (Type 1)

Name William Anthony Mahoney

Credential D.MIN., LMFT

Sex Male

Practice address 40 Shattuck Rd Ste 250, Andover, MA, 01810

Phone (603) 505-6847

Enumeration date Nov 10, 2008

Last updated in NPPES Jan 17, 2024

Taxonomy & licenses

106H00000X Marriage & Family Therapist Behavioral Health & Social Service Providers · License LMFT1735 (MA) Primary

LMFT · Licensed Marriage and Family Therapist: A licensed therapist specializing in relational and family psychotherapy. About the LMFT credential

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

How do I verify William Mahoney's NPI record?

Cross-check NPI 1639323298 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1639323298 active?

Yes, as of the latest NPPES snapshot, NPI 1639323298 is active (record last updated 2024-01-17).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-01-17.