Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Raymond Garr Crookston, AU.D.

Audiologist-Hearing Aid Fitter in Oakland, CA · enumerated 2007.

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

National Provider Identifier

1538206842

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Registry record

Entity type Individual (Type 1)

Name Dr. Raymond Garr Crookston

Credential AU.D.

Sex Male

Practice address 3346 Lakeshore Ave, Oakland, CA, 94610

Phone (510) 444-9771

Fax (510) 444-9773

Enumeration date Jan 30, 2007

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

237600000X Audiologist-Hearing Aid Fitter Speech, Language and Hearing Service Providers · License 2148 (CA) 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

What specialty is Raymond Crookston?

Raymond Crookston is registered in NPPES with the primary taxonomy of Audiologist-Hearing Aid Fitter. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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.

Other providers at this practice address

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Courtney Cook Audiologist · Oakland, CA NPI 1043680788

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.