Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

William J Wagner, M.D.

Emergency Medicine Physician in Green Bay, WI · enumerated 2014.

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

National Provider Identifier

1215355607

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Registry record

Entity type Individual (Type 1)

Name William J Wagner

Credential M.D.

Sex Male

Practice address 2845 Greenbrier Rd, Green Bay, WI, 54311

Phone (920) 288-8000

Fax (920) 288-4067

Enumeration date Apr 2, 2014

Last updated in NPPES Apr 28, 2026

Taxonomy & licenses

207P00000X Emergency Medicine Physician Allopathic & Osteopathic Physicians · License 70854 (WI) Primary

207P00000X Emergency Medicine Physician Allopathic & Osteopathic Physicians · License 273848 (MA) Secondary

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
100091617	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

Is NPI 1215355607 active?

Yes, as of the latest NPPES snapshot, NPI 1215355607 is active (record last updated 2026-04-28).

How do I verify William Wagner's NPI record?

Cross-check NPI 1215355607 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-04-28.