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

Steven L Kagen, M.D.

Allergy Physician in Appleton, WI · enumerated 2006.

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

National Provider Identifier

1235175589

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Steven L Kagen

Credential M.D.

Sex Male

Practice address Appleton, WI, 54911

Phone (920) 739-9100

Fax (920) 739-8779

Enumeration date Jun 22, 2006

Last updated in NPPES Apr 24, 2026

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

Taxonomy & licenses

207KA0200X Allergy Physician Allopathic & Osteopathic Physicians · License 22210-020 (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
30392500	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 1235175589 active?

Yes, as of the latest NPPES snapshot, NPI 1235175589 is active (record last updated 2026-04-24).

How do I verify Steven Kagen's NPI record?

Cross-check NPI 1235175589 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-04-24.