NPI Portal NPI Lookup & Verification

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

Mrs. Dorothy Seymour Mahan, M.A.

Marriage & Family Therapist in Highland Falls, NY · enumerated 2007.

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

National Provider Identifier

1730395666

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Registry record

Entity type Individual (Type 1)
Name Mrs. Dorothy Seymour Mahan
Credential M.A.
Sex Female
Practice address Highland Falls, NY, 10928
Phone (845) 446-0057
Enumeration date May 15, 2007
Last updated in NPPES Jul 8, 2007

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

Taxonomy & licenses

106H00000X Marriage & Family Therapist Behavioral Health & Social Service Providers · License 00127 (NY) Primary
106H00000X Marriage & Family Therapist Behavioral Health & Social Service Providers · License MFC22611 (CA) Secondary

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 Dorothy Mahan?
The National Provider Identifier (NPI) for Dorothy Mahan is 1730395666, a Type 1 (individual) record in the CMS NPPES registry.
Where does Dorothy Mahan practice?
The practice location on file with NPPES is in Highland Falls, NY. 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 2007-07-08.