Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Mark William Conradt, AU.D.

Audiologist in Neenah, WI · enumerated 2005.

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

National Provider Identifier

1255334421

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Registry record

Entity type Individual (Type 1)

Name Dr. Mark William Conradt

Credential AU.D.

Sex Male

Practice address 119 E Bell St, Neenah, WI, 54956

Phone (920) 969-1768

Fax (920) 969-1788

Enumeration date May 23, 2005

Last updated in NPPES Jul 3, 2024

Taxonomy & licenses

231H00000X Audiologist Speech, Language and Hearing Service Providers · License 11 (WI) Primary

AUD · Doctor of Audiology: A licensed audiologist diagnosing and treating hearing and balance disorders. About the AUD 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 1255334421 active?

Yes, as of the latest NPPES snapshot, NPI 1255334421 is active (record last updated 2024-07-03).

How do I verify Mark Conradt's NPI record?

Cross-check NPI 1255334421 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Other providers at this practice address

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Robert Prehn Otolaryngology Physician · Neenah, WI NPI 1407859523 Christopher Keller Otolaryngology Physician · Neenah, WI NPI 1437152568 Robert Bechard Otolaryngology Physician · Neenah, WI NPI 1306849443 Holly Rusch Audiologist · Neenah, WI NPI 1275529513 Ear Nose and Throat Specialists of Wisconsin Sc Otolaryngology Physician · Neenah, WI NPI 1508819178 Larry Burton Otolaryngology Physician · Neenah, WI NPI 1841226628 Jessica Grzeca Audiologist · Neenah, WI NPI 1982616686 Andrea Federman Audiologist · Neenah, WI NPI 1851303630

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-07-03.