Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ms. Cathleen Evalon Donaldson, LCSW

Social Worker in Port Jefferson, NY · enumerated 2006.

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

National Provider Identifier

1447366315

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Registry record

Entity type Individual (Type 1)

Name Ms. Cathleen Evalon Donaldson

Credential LCSW

Sex Female

Practice address 646 Main St, Port Jefferson, NY, 11777

Phone (631) 828-4135

Enumeration date Aug 22, 2006

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

104100000X Social Worker Behavioral Health & Social Service Providers · License 0727061 (NY) Primary

LCSW · Licensed Clinical Social Worker: A social worker licensed for clinical practice including mental-health therapy. About the LCSW 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 Cathleen Donaldson practice?

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

What is the NPI number for Cathleen Donaldson?

The National Provider Identifier (NPI) for Cathleen Donaldson is 1447366315, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.