Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Nancy Williams, M.D.

Hospice and Palliative Medicine (Internal Medicine) Physician in Tulsa, OK · enumerated 2006.

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

National Provider Identifier

1235190448

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Registry record

Entity type Individual (Type 1)

Name Nancy Williams

Credential M.D.

Sex Female

Practice address 1705 E 19th St, Suite 302, Tulsa, OK, 74104

Phone (918) 748-7585

Fax (918) 748-7539

Enumeration date Mar 29, 2006

Last updated in NPPES Dec 16, 2015

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 22490 (OK) Secondary

207RH0002X Hospice and Palliative Medicine (Internal Medicine) Physician Allopathic & Osteopathic Physicians · License 22490 (OK) 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
200026690A	Medicaid	OK	-

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

How do I verify Nancy Williams's NPI record?

Cross-check NPI 1235190448 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1235190448 active?

Yes, as of the latest NPPES snapshot, NPI 1235190448 is active (record last updated 2015-12-16).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2015-12-16.