Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

William L Clapp, MD

Psychiatry Physician in Minneapolis, MN · enumerated 2006.

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

National Provider Identifier

1578525465

Verified

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Registry record

Entity type Individual (Type 1)

Name William L Clapp

Credential MD

Sex Male

Practice address Minneapolis, MN, 55419

Phone (612) 746-5888

Fax (612) 746-5818

Enumeration date Apr 5, 2006

Last updated in NPPES Apr 7, 2019

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

2084P0800X Psychiatry Physician Allopathic & Osteopathic Physicians · License 39313 (MN) 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
HP22348	Other	-	HEALTH PARTNERS
260044492	Other	-	RR MEDICARE
115611	Other	-	UCARE
551220400	Medicaid	MN	-
62G47CL	Other	MN	BLUECROSS BLUESHIELD MN
62G46CL	Other	MN	BLUE CROSS BLUE SHIELD

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

Where does William Clapp practice?

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

What is the NPI number for William Clapp?

The National Provider Identifier (NPI) for William Clapp is 1578525465, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2019-04-07.