Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Lydia Larocque Chevalier, PHD

Clinical Psychologist in Watertown, MA · enumerated 2017.

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

National Provider Identifier

1437675105

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Registry record

Entity type Individual (Type 1)

Name Dr. Lydia Larocque Chevalier

Credential PHD

Sex Female

Practice address 54 Buick St, Watertown, MA, 02472

Phone (413) 768-9936

Enumeration date Aug 15, 2017

Last updated in NPPES Jul 25, 2022

Taxonomy & licenses

103TC0700X Clinical Psychologist Behavioral Health & Social Service Providers · License 11696 (MA) 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

Where does Lydia Chevalier practice?

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

What is the NPI number for Lydia Chevalier?

The National Provider Identifier (NPI) for Lydia Chevalier is 1437675105, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-07-25.