Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Katharine A Farmer, LCSW

Clinical Social Worker in Middle Island, NY · enumerated 2015.

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

National Provider Identifier

1467837849

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Registry record

Entity type Individual (Type 1)

Name Katharine A Farmer

Credential LCSW

Sex Female

Practice address 11 Swezey Ln, Middle Island, NY, 11953

Phone (845) 505-0120

Enumeration date Jul 27, 2015

Last updated in NPPES Apr 15, 2022

Taxonomy & licenses

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License 092893-01 (NY) Primary

104100000X Social Worker Behavioral Health & Social Service Providers · License 095460-1 Secondary

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 Katharine Farmer practice?

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

What is the NPI number for Katharine Farmer?

The National Provider Identifier (NPI) for Katharine Farmer is 1467837849, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-04-15.