Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Cynthia L Ferrell, AU.D.

Audiologist in Rapid City, SD · enumerated 2006.

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

National Provider Identifier

1700986569

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Registry record

Entity type Individual (Type 1)

Name Dr. Cynthia L Ferrell

Credential AU.D.

Sex Female

Practice address 716 San Marco Blvd, Rapid City, SD, 57702

Phone (605) 348-1552

Enumeration date Sep 22, 2006

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

231H00000X Audiologist Speech, Language and Hearing Service Providers · License 317A (SD) Primary

231H00000X Audiologist Speech, Language and Hearing Service Providers · License 426 (CO) Secondary

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.

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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 Cynthia Ferrell?

Cynthia Ferrell is registered in NPPES with the primary taxonomy of Audiologist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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