Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. William Chris Kostman, M.D.

Orthopaedic Surgery Physician in Creve Coeur, MO · enumerated 2006.

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

National Provider Identifier

1912986506

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Registry record

Entity type Individual (Type 1)

Name Dr. William Chris Kostman

Credential M.D.

Sex Male

Practice address 10448 Old Olive St Rd, Ste 200, Creve Coeur, MO, 63141

Phone (314) 597-8887

Fax (314) 447-9559

Enumeration date Jan 11, 2006

Last updated in NPPES May 24, 2023

Taxonomy & licenses

207X00000X Orthopaedic Surgery Physician Allopathic & Osteopathic Physicians · License 113686 (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
0900444	Other	MO	UNITED HEALTH CARE
G59783	Other	MO	MERCY #80
009219	Other	MO	EXCLUSIVE CHOICE
113052	Other	MO	BLUE CROSS BLUE SHIELD
55165	Other	MO	GHP
5596509	Other	MO	AETNA
335518	Other	MO	HEALTHLINK

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 specialty is William Kostman?

William Kostman is registered in NPPES with the primary taxonomy of Orthopaedic Surgery Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-05-24.