NPI Portal NPI Lookup & Verification

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

Mr. Michael Leroy Sloniker, M.S.

Audiologist in Sioux City, IA · enumerated 2006.

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

National Provider Identifier

1881644946

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Registry record

Entity type Individual (Type 1)
Name Mr. Michael Leroy Sloniker
Credential M.S.
Sex Male
Practice address Sioux City, IA, 51104
Phone (712) 258-3332
Fax (712) 258-3233
Enumeration date May 11, 2006
Last updated in NPPES Aug 28, 2008

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

Taxonomy & licenses

231H00000X Audiologist Speech, Language and Hearing Service Providers · License 00357 (IA) Primary
237700000X Hearing Instrument Specialist Speech, Language and Hearing Service Providers · License 00592 (IA) Secondary

Other identifiers

Identifier Type State Issuer
5834592 Medicaid SD -
10025155400 Medicaid NE -
1443556 Medicaid IA -

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.

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Frequently asked questions

How do I verify Michael Sloniker's NPI record?
Cross-check NPI 1881644946 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Is NPI 1881644946 active?
Yes, as of the latest NPPES snapshot, NPI 1881644946 is active (record last updated 2008-08-28).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-08-28.