Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Naperville Hearing Services

Audiologist in Naperville, IL · enumerated 2007 · authorized official Mike Siefert, Owner/Audiologist.

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

National Provider Identifier

1932384674

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Registry record

Entity type Organization (Type 2)

Legal business name Naperville Hearing Services

Practice address 10 W Martin Ave, Naperville, IL, 60540

Phone (630) 355-5668

Fax (630) 355-2071

Enumeration date Dec 31, 2007

Last updated in NPPES Dec 31, 2007

Taxonomy & classification

231H00000X Audiologist Speech, Language and Hearing Service Providers · License 147-000266 (IL) Primary

Authorized official

Name Mike Siefert

Title Owner/Audiologist

Phone (630) 960-0213

Other identifiers

Identifier	Type	State	Issuer
2225522	Other	IL	BLUE SHIELD NUMBER

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

Where is Naperville Hearing Services located?

The practice location on file with NPPES is in Naperville, IL.

How current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2007-12-31. Verify at npiregistry.cms.hhs.gov.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-12-31.