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

Ms. Margaret Ann Libby, M.D.

Family Medicine Physician in Lockport, NY · enumerated 2005.

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

National Provider Identifier

1235112822

Verified

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Registry record

Entity type Individual (Type 1)

Name Ms. Margaret Ann Libby

Credential M.D.

Sex Female

Practice address Lockport, NY, 14094

Phone (716) 438-7235

Fax (716) 795-3013

Enumeration date Nov 28, 2005

Last updated in NPPES Sep 24, 2025

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

Taxonomy & licenses

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License 17373501 (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
ML01086539	Medicaid	NY	-
00174000000	Other	NY	HEALTH CARE PLAN
0102554	Other	NY	INDEPENDENT HEALTH
040426003525	Other	NY	FIDELIS
0031096	Other	NY	GHI
00020500201	Other	NY	UNIVERA
000510537001	Other	NY	BLUE CROSS BLUE SHIELD

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

What is the NPI number for Margaret Libby?

The National Provider Identifier (NPI) for Margaret Libby is 1235112822, a Type 1 (individual) record in the CMS NPPES registry.

Where does Margaret Libby practice?

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

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-09-24.