Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. William G Gustafson, MD

Family Medicine Physician in Rhinelander, WI · enumerated 2006.

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

National Provider Identifier

1780640094

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Registry record

Entity type Individual (Type 1)

Name Dr. William G Gustafson

Credential MD

Sex Male

Practice address 1630 Chippewa Dr, Rhinelander, WI, 54501

Phone (715) 361-5480

Fax (715) 361-5499

Enumeration date Apr 25, 2006

Last updated in NPPES Dec 17, 2012

Taxonomy & licenses

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License 0031548 (WI) 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
31675600	Medicaid	WI	-

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

How do I verify William Gustafson's NPI record?

Cross-check NPI 1780640094 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1780640094 active?

Yes, as of the latest NPPES snapshot, NPI 1780640094 is active (record last updated 2012-12-17).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-12-17.