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

Dr. Charles E Larson, M.D.

Adult Medicine Physician in Fox Lake, WI · enumerated 2007.

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

National Provider Identifier

1184768129

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Registry record

Entity type Individual (Type 1)

Name Dr. Charles E Larson

Credential M.D.

Sex Male

Practice address Fox Lake, WI, 54935

Phone (920) 928-6958

Fax (920) 928-6951

Enumeration date Feb 15, 2007

Last updated in NPPES Jul 8, 2007

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

Taxonomy & licenses

207QA0505X Adult Medicine Physician Allopathic & Osteopathic Physicians · License 26821 (WI) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

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

Where does Charles Larson practice?

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

What is the NPI number for Charles Larson?

The National Provider Identifier (NPI) for Charles Larson is 1184768129, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.