NPI Portal NPI Lookup & Verification

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

Mrs. Mary K. Rossi, M.A.

Counselor in Lynn, MA · enumerated 2010 · practices at Commonwealth of Massachusetts.

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

National Provider Identifier

1366765000

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Registry record

Entity type Individual (Type 1)
Name Mrs. Mary K. Rossi
Credential M.A.
Sex Female
Practice address Lynn, MA, 01901
Phone (781) 592-5691
Enumeration date Mar 9, 2010
Last updated in NPPES Mar 9, 2010

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

Taxonomy & licenses

101Y00000X Counselor Behavioral Health & Social Service Providers Primary

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 Mary Rossi?
The National Provider Identifier (NPI) for Mary Rossi is 1366765000, a Type 1 (individual) record in the CMS NPPES registry.
Where does Mary Rossi practice?
The practice location on file with NPPES is in Lynn, 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 2010-03-09.