237700000X — Hearing Instrument Specialist

237700000X is the NUCC provider taxonomy code for Hearing Instrument Specialist (individual providers). 12,561 providers in our latest NPPES snapshot list it as their primary taxonomy.

Taxonomy code	237700000X
Display name	Hearing Instrument Specialist
Grouping	Speech, Language and Hearing Service Providers
Classification	Hearing Instrument Specialist
Section	Individual
Directory	Hearing Instrument Specialist provider directory

Definition

Individuals who test hearing for the selection, adaptation, fitting, adjusting, servicing, and sale of hearing aids. Hearing Instrument Specialist is a designation provided individuals who qualify by the National Hearing Aid Society

Definition from the NUCC Health Care Provider Taxonomy code set.

Related taxonomy codes

231H00000X — Audiologist
231HA2400X — Assistive Technology Practitioner Audiologist (Audiologist)
231HA2500X — Assistive Technology Supplier Audiologist (Audiologist)
237600000X — Audiologist-Hearing Aid Fitter
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 237700000X mean?

237700000X is the NUCC Health Care Provider Taxonomy code for Hearing Instrument Specialist 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 237700000X?

Browse the Hearing Instrument Specialist directory, or use the NPI search and filter by state.

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