Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Glenn Mitchell Mazzone II, PHD

Cognitive & Behavioral Psychologist in Watertown, MA · enumerated 2025 · practices at Mindfulness and Change Group, LLC.

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

National Provider Identifier

1376403378

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Registry record

Entity type Individual (Type 1)

Name Glenn Mitchell Mazzone II

Credential PHD

Sex Male

Practice address 40 Spring St Ste 215, Watertown, MA, 02472

Phone (617) 299-9956

Enumeration date Nov 13, 2025

Last updated in NPPES Nov 13, 2025

Taxonomy & licenses

103TB0200X Cognitive & Behavioral Psychologist Behavioral Health & Social Service Providers Primary

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

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for Glenn Mazzone?

The National Provider Identifier (NPI) for Glenn Mazzone is 1376403378, a Type 1 (individual) record in the CMS NPPES registry.

Where does Glenn Mazzone practice?

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

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