Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ann F Lillis, ANP

Adult Health Nurse Practitioner in Williamsville, NY · enumerated 2005.

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

National Provider Identifier

1609852607

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Registry record

Entity type Individual (Type 1)

Name Ann F Lillis

Credential ANP

Sex Female

Practice address 60 Maple Rd, Ste 1, Williamsville, NY, 14221

Phone (716) 626-5250

Fax (716) 332-2218

Enumeration date Dec 21, 2005

Last updated in NPPES Dec 6, 2013

Taxonomy & licenses

363LA2200X Adult Health Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License F301173 (NY) Primary

Other identifiers

Identifier	Type	State	Issuer
00027009201	Other	NY	UNIVERA
9512113	Other	NY	INDEPENDENT HEALTH
000560817002	Other	NY	BLUE CROSS OF WNY
02502481	Medicaid	NY	-

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

Is NPI 1609852607 active?

Yes, as of the latest NPPES snapshot, NPI 1609852607 is active (record last updated 2013-12-06).

How do I verify Ann Lillis's NPI record?

Cross-check NPI 1609852607 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2013-12-06.