231H00000X
Hearing Instrument Specialist Taxonomy Code 237700000X
237700000X
Level II - Classification
15,146Registered providers
26.0NUCC version
54States & territories
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
Code Details for 237700000X
About Taxonomy Code 237700000X
The taxonomy code 237700000X identifies Hearing Instrument Specialist within the Speech, Language And Hearing Service Providers provider grouping. It is a Level II — Classification code, which names a provider's occupation or service within the broader provider grouping.
NPI records show 15,146 registered providers whose primary or secondary taxonomy is this code. Of these, 2,967 (20%) are registered as organizations and 12,179 (80%) as individual providers. The states with the most hearing instrument specialist providers are Florida (1,473), California (1,419), Texas (1,122).
Taxonomy codes are self-selected by the provider based on their education and training; they describe the provider's type and specialty, not the specific services rendered.
Provider Composition & Statistics
15,146Total providers
2,967Organizations 20%
12,179Individuals 80%
6,091Female
6,068Male
20Undisclosed
Gender is recorded for individual providers only; organizations are not gendered. Source: NPPES, last updated 2026-07-26T00:00:00.
View all 15,146 providersHearing Instrument Specialist Providers by State
Provider counts by U.S. state and territory. Select a state to open its provider directory.
All states (nationwide)
15,146
Alabama205Alaska40Arizona384Arkansas108California1,419Colorado264Connecticut155Delaware48District Of Columbia6Florida1,473Georgia365Guam2Hawaii44Idaho116Illinois537Indiana395Iowa258Kansas178Kentucky263Louisiana147Maine85Maryland124Massachusetts264Michigan487Minnesota359Mississippi78Missouri472Montana87Nebraska117Nevada97New Hampshire87New Jersey336New Mexico100New York469North Carolina440North Dakota41Ohio498Oklahoma150Oregon294Palau1Pennsylvania548Puerto Rico2Rhode Island41South Carolina255South Dakota65Tennessee215Texas1,122Utah125Vermont39Virginia368Washington372West Virginia91Wisconsin396Wyoming51
Frequently Asked Questions
237700000X questionsNPPES lists 15,146 registered providers with this taxonomy code (Hearing Instrument Specialist).
Both. About 20% of these providers are registered as organizations and 80% as individuals.
This taxonomy code does not map to a Medicare specialty code in the current crosswalk.
It is a Level II - Classification code in the NUCC Health Care Provider Taxonomy set.
Use the "Providers by state" directory on this page to open the list of hearing instrument specialist providers registered in any U.S. state.
Source: National Uniform Claim Committee (NUCC) Health Care Provider Taxonomy code set, Version 26.0. Provider counts from NPPES. See nucc.org.
