Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Glenn Eugene Sondag, MD

Q: What is the NPI number for Glenn Sondag?

The National Provider Identifier (NPI) for Glenn Sondag is 1518950120, a Type 1 (individual) record in the CMS NPPES registry.

Dermatology Physician in Brookfield, WI · enumerated 2005 · practices at Affiliated Dermatologists Sc.

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

National Provider Identifier

1518950120

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Registry record

Entity type Individual (Type 1)

Name Glenn Eugene Sondag

Credential MD

Sex Male

Practice address 13800 W North Ave, Ste 100, Brookfield, WI, 53005

Phone (262) 754-4488

Fax (262) 754-4940

Enumeration date Aug 30, 2005

Last updated in NPPES Apr 20, 2008

Taxonomy & licenses

207N00000X Dermatology Physician Allopathic & Osteopathic Physicians · License 21528020 (WI) Primary

207N00000X Dermatology Physician Allopathic & Osteopathic Physicians · License 7191 (AZ) 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
30302600	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

What is the NPI number for Glenn Sondag?

The National Provider Identifier (NPI) for Glenn Sondag is 1518950120, a Type 1 (individual) record in the CMS NPPES registry.

Where does Glenn Sondag practice?

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

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-04-20.