Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. William Kellar Winkelmeyer, M.D.

Nephrology Physician in Columbia, MO · enumerated 2005 · practices at Nephrology and Hypertension Associates.

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

National Provider Identifier

1316943475

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Registry record

Entity type Individual (Type 1)

Name Dr. William Kellar Winkelmeyer

Credential M.D.

Sex Male

Practice address 1205 W Broadway, Columbia, MO, 65203

Phone (573) 499-0642

Fax (573) 449-1787

Enumeration date Jun 23, 2005

Last updated in NPPES Oct 5, 2022

Taxonomy & licenses

207RN0300X Nephrology Physician Allopathic & Osteopathic Physicians · License 36326 (MO) 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
201823911	Medicaid	MO	-
116646	Other	MO	HEALTHLINK
19620	Other	MO	BLUE CROSS BLUE SHIELD
340001743	Other	MO	RAILROAD MEDICARE
1721	Other	MO	HEALTHCARE USA
000623655	Other	MO	HUMANA IND
23879	Other	MO	GROUP HEALTH PLANS
733581	Other	MO	FIRST HEALTH
A10329	Other	MO	MERCY

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 1316943475 active?

Yes, as of the latest NPPES snapshot, NPI 1316943475 is active (record last updated 2022-10-05).

How do I verify William Winkelmeyer's NPI record?

Cross-check NPI 1316943475 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

Browse all →

Blake Brooks Nephrology Physician · Columbia, MO NPI 1255337390 Myra Watson Nephrology Physician · Columbia, MO NPI 1366448425 Nephrology and Hypertension Associates Nephrology Physician · Columbia, MO NPI 1073519898 Leslie Hamlett Nephrology Physician · Columbia, MO NPI 1720012628 Leslie Prosser Nurse Practitioner · Columbia, MO NPI 1609186477 Christopher Schiavo Internal Medicine Physician · Columbia, MO NPI 1700268133 Blake Welschmeyer Internal Medicine Physician · Columbia, MO NPI 1154771178

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-10-05.