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

Jason Stark, LCSW

Clinical Social Worker in Ithaca, NY · enumerated 2007 · practices at Clare Joanne Nicholetti, Lcsw.

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

National Provider Identifier

1609998574

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Jason Stark

Credential LCSW

Sex Male

Practice address Ithaca, NY, 14850

Phone (607) 592-2377

Enumeration date Apr 4, 2007

Last updated in NPPES Jul 7, 2023

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

Taxonomy & licenses

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License 082965 (NY) Primary

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

Other identifiers

Identifier	Type	State	Issuer
079191-1	Other	NY	NYS
082965	Other	NY	LCSW

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

How do I verify Jason Stark's NPI record?

Cross-check NPI 1609998574 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1609998574 active?

Yes, as of the latest NPPES snapshot, NPI 1609998574 is active (record last updated 2023-07-07).

Other providers at this practice address

Browse all →

Susan Michlovitz Physical Therapist · Ithaca, NY NPI 1689645335 Clare Joanne Nicholetti, Lcsw Specialist · Ithaca, NY NPI 1194812560 David Frahm Psychologist · Ithaca, NY NPI 1033364906 Timothy Foley Acupuncturist · Ithaca, NY NPI 1164744074 Coleen Osborne Acupuncturist · Ithaca, NY NPI 1356663264 Sara Kranzler Psychologist · Ithaca, NY NPI 1295195782

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-07-07.