231H00000X — Audiologist

231H00000X is the NUCC provider taxonomy code for Audiologist (individual providers). 24,735 providers in our latest NPPES snapshot list it as their primary taxonomy.

Taxonomy code	231H00000X
Display name	Audiologist
Grouping	Speech, Language and Hearing Service Providers
Classification	Audiologist
Section	Individual
Directory	Audiologist provider directory

Definition

(1) A specialist in evaluation, habilitation and rehabilitation of those whose communication disorders center in whole or in part in hearing function. Audiologists are autonomous professionals who identify, assess, and manage disorders of the auditory, balance and other neural systems. Audiologists provide audiological (aural) rehabilitation to children and adults across the entire age span. Audiologists select, fit and dispense amplification systems such as hearing aids and related devices. (2) An audiologist is a person qualified by a master's degree in audiology, licensed by the state, where applicable, and practicing within the scope of that license. Audiologists evaluate and treat patients with impaired hearing. They plan, direct and conduct rehabilitative programs with audiotry substitutional devises (hearing aids) and other therapy.

Definition from the NUCC Health Care Provider Taxonomy code set.

Related taxonomy codes

231HA2400X — Assistive Technology Practitioner Audiologist (Audiologist)
231HA2500X — Assistive Technology Supplier Audiologist (Audiologist)
237600000X — Audiologist-Hearing Aid Fitter
237700000X — Hearing Instrument Specialist
235500000X — Speech/Language/Hearing Specialist/Technologist
2355A2700X — Audiology Assistant (Specialist/Technologist)
2355S0801X — Speech-Language Assistant (Specialist/Technologist)
235Z00000X — Speech-Language Pathologist

Frequently asked questions

What does taxonomy code 231H00000X mean?

231H00000X is the NUCC Health Care Provider Taxonomy code for Audiologist in the "Speech, Language and Hearing Service Providers" grouping. It classifies individual providers.

Where is the taxonomy code used?

Providers select a taxonomy code when applying for an NPI, and it appears on insurance claims (CMS-1500 box 33b / 837 electronic claims) to identify the provider's classification. Payers may require the taxonomy that matches your credential and license.

How do I find providers with taxonomy 231H00000X?

Browse the Audiologist directory, or use the NPI search and filter by state.

Source: CMS NPPES (public data). Snapshot 2026-07-09.