Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mr. Mark Allen Rau, HEARING AID SPECIALI

Hearing Instrument Specialist in Eau Claire, WI · enumerated 2007.

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

National Provider Identifier

1376722025

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Registry record

Entity type Individual (Type 1)

Name Mr. Mark Allen Rau

Credential HEARING AID SPECIALI

Sex Male

Practice address 2430 London Road, Eau Claire, WI, 54701

Phone (715) 832-5650

Fax (715) 835-5669

Enumeration date Oct 30, 2007

Last updated in NPPES Oct 30, 2007

Taxonomy & licenses

237700000X Hearing Instrument Specialist Speech, Language and Hearing Service Providers · License 1210060 (WI) Primary

Other identifiers

Identifier	Type	State	Issuer
42839900	Other	WI	MEDICAL PROGRAM BILLING P

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 1376722025 active?

Yes, as of the latest NPPES snapshot, NPI 1376722025 is active (record last updated 2007-10-30).

How do I verify Mark Rau's NPI record?

Cross-check NPI 1376722025 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 2007-10-30.