Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mary P Leahy, MD

Internal Medicine Physician in West Nyack, NY · enumerated 2005.

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

National Provider Identifier

1215921283

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Registry record

Entity type Individual (Type 1)

Name Mary P Leahy

Credential MD

Sex Female

Practice address 2 Crosfield Ave, Suite 318, West Nyack, NY, 10994

Phone (845) 353-5600

Fax (845) 353-5668

Enumeration date Sep 7, 2005

Last updated in NPPES Mar 15, 2011

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 1671161 (NY) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
2594362	Other	-	GHI
0057864	Other	-	GHI HMO
01852895	Medicaid	NY	-
132995699	Other	-	HEALTH NOW
0D2175	Other	-	HEALTHNET OF NORTHEAST
132995699	Other	-	HUDSON HEALTH PLAN
20533	Other	-	AETNA/USHC
4096837	Other	-	AETNA
132995699	Other	-	CIGNA PPO
23E881	Other	-	BC/BS EMPIRE
8175389003	Other	-	CIGNA HMO, POS
132995699	Other	-	HORIZON HEALTHCARE OF NY
132995699	Other	-	INDECS(ORANGE-ULSTER SCHL
132995699	Other	-	LOCAL 1199
040426012111	Other	-	FIDELIS (MEDICAID HMO)
132995699	Other	-	BEECH STREET NETWORK
132995699	Other	-	FAM HEALTH PLUS(HUDSON HP
45022P	Other	-	HIP

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

Is NPI 1215921283 active?

Yes, as of the latest NPPES snapshot, NPI 1215921283 is active (record last updated 2011-03-15).

How do I verify Mary Leahy's NPI record?

Cross-check NPI 1215921283 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 2011-03-15.