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

William John Simons, M.D.

Psychiatry Physician in Eau Claire, WI · enumerated 2005.

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

National Provider Identifier

1790778801

Verified

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Registry record

Entity type Individual (Type 1)

Name William John Simons

Credential M.D.

Sex Male

Practice address Eau Claire, WI, 54703

Phone (715) 838-3635

Enumeration date Aug 24, 2005

Last updated in NPPES Jul 16, 2018

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

Taxonomy & licenses

2084P0800X Psychiatry Physician Allopathic & Osteopathic Physicians · License 0000-18058 (NC) Secondary

2084P0800X Psychiatry Physician Allopathic & Osteopathic Physicians · License 69540 (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
8976313	Medicaid	NC	-
76313	Other	NC	BCBS
P00341710	Other	-	RAILROAD MEDICARE B

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 Simons practice?

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

What is the NPI number for William Simons?

The National Provider Identifier (NPI) for William Simons is 1790778801, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Ganesh Ram Physician Assistant · Eau Claire, WI NPI 1467456848 Jackie Joday Clinical Social Worker · Eau Claire, WI NPI 1841296316 Margaret Landry Advanced Practice Midwife · Eau Claire, WI NPI 1104822238 Eric Niendorf Diagnostic Radiology Physician · Eau Claire, WI NPI 1780685404 Michel Barsoum Cardiovascular Disease Physician · Eau Claire, WI NPI 1215920483 Jennifer Bantz Obstetrics & Gynecology Physician · Eau Claire, WI NPI 1558357061 Sandeep Pangarkar Hospitalist Physician · Eau Claire, WI NPI 1033106745 Rodney Erickson Family Medicine Physician · Eau Claire, WI NPI 1528058021

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-07-16.