Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Norman F Deffner, M.D.

Dermatology Physician in Wausau, WI · enumerated 2010.

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

National Provider Identifier

1700100559

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Registry record

Entity type Individual (Type 1)

Name Norman F Deffner

Credential M.D.

Sex Male

Practice address 425 Pine Ridge Blvd, Suite 305a, Wausau, WI, 54401

Phone (715) 847-2626

Enumeration date Mar 23, 2010

Last updated in NPPES Mar 23, 2010

Taxonomy & licenses

207N00000X Dermatology Physician Allopathic & Osteopathic Physicians · License 16759 (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

Is NPI 1700100559 active?

Yes, as of the latest NPPES snapshot, NPI 1700100559 is active (record last updated 2010-03-23).

How do I verify Norman Deffner's NPI record?

Cross-check NPI 1700100559 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 2010-03-23.