Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. William Cavanaugh Chapman, MD

Transplant Surgery Physician in Saint Louis, MO · enumerated 2006.

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

National Provider Identifier

1790703270

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Registry record

Entity type Individual (Type 1)

Name Dr. William Cavanaugh Chapman

Credential MD

Sex Male

Practice address 4921 Parkview Pl, Div Surg Transplant, Ste 12b, Saint Louis, MO, 63110

Phone (314) 747-9889

Fax (314) 361-4197

Enumeration date Jul 17, 2006

Last updated in NPPES Apr 15, 2025

Taxonomy & licenses

2086S0102X Surgical Critical Care Physician Allopathic & Osteopathic Physicians · License 2002007882 (MO) Secondary

2086X0206X Surgical Oncology Physician Allopathic & Osteopathic Physicians · License 2002007882 (MO) Secondary

204F00000X Transplant Surgery Physician Allopathic & Osteopathic Physicians · License 2002007882 (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
206660516	Medicaid	MO	-

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

What is the NPI number for William Chapman?

The National Provider Identifier (NPI) for William Chapman is 1790703270, a Type 1 (individual) record in the CMS NPPES registry.

Where does William Chapman practice?

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

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-04-15.