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

Peter J Steinert, DDS

General Practice Dentistry in Milwaukee, WI · enumerated 2006.

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

National Provider Identifier

1639258577

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Registry record

Entity type Individual (Type 1)

Name Peter J Steinert

Credential DDS

Sex Male

Practice address Milwaukee, WI, 53233

Phone (920) 917-2566

Enumeration date Nov 2, 2006

Last updated in NPPES Jan 28, 2026

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

Taxonomy & licenses

1223G0001X General Practice Dentistry Dental Providers · License 4255-15 (WI) Primary

DDS — Doctor of Dental Surgery: A licensed dentist; DDS and DMD are equivalent dental degrees. About the DDS 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 1639258577 active?

Yes — as of the latest NPPES snapshot, NPI 1639258577 is active (record last updated 2026-01-28).

How do I verify Peter Steinert's NPI record?

Cross-check NPI 1639258577 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 2026-01-28.