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

William Winston, BC-HIS

Hearing Instrument Specialist in San Luis Obispo, CA · enumerated 2006 · practices at Beltone Hearing Aid Center.

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

National Provider Identifier

1932178779

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Registry record

Entity type Individual (Type 1)
Name William Winston
Credential BC-HIS
Sex Male
Practice address San Luis Obispo, CA, 93401
Phone (805) 547-0955
Fax (805) 547-0965
Enumeration date Mar 15, 2006
Last updated in NPPES Jul 9, 2007

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

Taxonomy & licenses

237700000X Hearing Instrument Specialist Speech, Language and Hearing Service Providers · License HA3571 (CA) Primary

Other identifiers

Identifier Type State Issuer
HA0035710 Medicaid CA -
ZZZ57439Z Other - BLUESHIELD

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

Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.
What specialty is William Winston?
William Winston is registered in NPPES with the primary taxonomy of Hearing Instrument Specialist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-09.