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

Dr. Elizabeth Mainzer Gagnon, PHD

Clinical Psychologist in Boston, MA · enumerated 2007.

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

National Provider Identifier

1558414060

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Registry record

Entity type Individual (Type 1)
Name Dr. Elizabeth Mainzer Gagnon
Credential PHD
Sex Female
Practice address Boston, MA, 02110
Phone (617) 451-0055
Fax (617) 451-0055
Enumeration date Jan 19, 2007
Last updated in NPPES Sep 22, 2016

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 8186 (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
W06313 Other MA 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

What is the NPI number for Elizabeth Gagnon?
The National Provider Identifier (NPI) for Elizabeth Gagnon is 1558414060, a Type 1 (individual) record in the CMS NPPES registry.
Where does Elizabeth Gagnon practice?
The practice location on file with NPPES is in Boston, 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 2016-09-22.