Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Martha Williams, RN

Registered Nurse in Ithaca, NY · enumerated 2006.

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

National Provider Identifier

1205800745

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Registry record

Entity type Individual (Type 1)

Name Martha Williams

Credential RN

Sex Female

Practice address Cornell University Health Services, Ho Plaza, Ithaca, NY, 14853

Phone (607) 255-6959

Fax (607) 254-3404

Enumeration date Feb 13, 2006

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

163W00000X Registered Nurse Nursing Service Providers · License 284790-1 (NY) Primary

RN · Registered Nurse: A nurse who completed an accredited nursing program and passed the NCLEX-RN licensure exam. About the RN 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

Is NPI 1205800745 active?

Yes, as of the latest NPPES snapshot, NPI 1205800745 is active (record last updated 2007-07-08).

How do I verify Martha Williams's NPI record?

Cross-check NPI 1205800745 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Other providers at this practice address

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James Macmillan Internal Medicine Physician · Ithaca, NY NPI 1376514919 Edward Koppel Internal Medicine Physician · Ithaca, NY NPI 1184695728 David Wentzel Family Medicine Physician · Ithaca, NY NPI 1033180666 Lisa Cope Adult Health Nurse Practitioner · Ithaca, NY NPI 1417928920 Beth Kutler Family Nurse Practitioner · Ithaca, NY NPI 1528039997 Janet Corson-Rikert Adolescent Medicine (Internal Medicine) Physician · Ithaca, NY NPI 1821069329 Vivian Hsiao Adult Health Nurse Practitioner · Ithaca, NY NPI 1558332064 Lisa Stankus Adult Health Nurse Practitioner · Ithaca, NY NPI 1265404487

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.