Hearing Instrument Specialist
12,699 active US providers register Hearing Instrument Specialist as their primary taxonomy. That is 0.1% of every provider in the registry, and the 114th largest of 584 specialties with a page here.
- Taxonomy code
- 237700000X
- Grouping
- Speech, Language and Hearing Service Providers
- Classification
- Hearing Instrument Specialist
- Active providers
- 12,699
- States covered
- 51 of 51
What the code means
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 quoted verbatim from the NUCC Health Care Provider Taxonomy code set, version 25.1. Not paraphrased.
Where they are
Counted by practice location, not by mailing address or by licence state. A provider practising across a state line is counted where they practise.
| State | Providers | Share |
|---|---|---|
| Florida | 1,357 | |
| California | 1,202 | |
| Texas | 979 | |
| Pennsylvania | 509 | |
| Illinois | 472 | |
| Michigan | 445 | |
| Ohio | 426 | |
| Missouri | 407 | |
| New York | 397 | |
| North Carolina | 378 | |
| Wisconsin | 355 | |
| Indiana | 338 | |
| Arizona | 334 | |
| Georgia | 333 | |
| Washington | 330 |
Showing the 15 largest of 51 states with at least one.
Who registers under this code
10,677 of these are people and 2,022 are organisations, so 16% of the code is businesses rather than clinicians. Half of them had registered by 2016, and 3,496 registered in the last five years, 28% of the current population.
That is close to the pace of the registry as a whole.
Where the practices are
By practice-location city. City counts are noisier than state counts, because a large employer files one address for many providers.
- SAN ANTONIO, TX64
- TUCSON, AZ53
- HOUSTON, TX50
- PORTLAND, OR39
- SPRINGFIELD, MO39
- LAS VEGAS, NV36
- LUBBOCK, TX36
- OCALA, FL36
- MADISON, WI36
- VIRGINIA BEACH, VA35
What else they list
Providers whose primary code is Hearing Instrument Specialist most often carry these secondary taxonomies as well. This is the closest thing the registry has to a map of which specialties overlap in practice, and it is not published anywhere else.
| Also listed | Providers | Share |
|---|---|---|
| Audiologist-Hearing Aid Fitter | 436 | 3.4% |
| Hearing Aid Equipment | 163 | 1.3% |
| Audiologist | 156 | 1.2% |
| Durable Medical Equipment & Medical Supplies | 39 | 0.3% |
| Specialist | 27 | 0.2% |
| Audiology Assistant | 24 | 0.2% |
| Speech-Language Pathologist | 23 | 0.2% |
| Optician | 22 | 0.2% |
Looking up a specific provider
These counts come from the monthly NPPES file. To check one provider, use their NPI: the lookup reads the live registry and shows whether the identifier is still active, which the monthly file cannot tell you about the last few weeks.
Counts from npidata_pfile_20050523-20260712.csv, built 2026-08-09. Primary taxonomy only, deactivated identifiers excluded.