Speech, Language and Hearing Service Providers / 231H00000X
Individual · classification · Medicare specialty 64
231H00000X Audiologist
231H00000X is the taxonomy code for Audiologist, in the NUCC group “Speech, Language and Hearing Service Providers”. It is a code for individual providers — the kind used on a Type 1 NPI. Medicare maps it to specialty 64, Audiologist, under which 11,754 practitioners are enrolled.
- 1Taxonomy code 231H00000X
- 2Level Classification
- 3Medicare specialty 64 Audiologist
- 4Codes in this group 9
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.
— NUCC Health Care Provider Taxonomy, version 26.1
Where 231H00000X sits
- Group: Speech, Language and Hearing Service Providers — code 1 of 9 in the group
- Classification: Audiologist 231H00000X
This is the general code for Audiologist. 2 more specific codes sit beneath it; pick one of those when the provider's training or certification matches it, and this one otherwise. A provider may report more than one taxonomy code on an NPI but marks one as primary.
Medicare
CMS's taxonomy crosswalk links 231H00000X to Medicare specialty 64 (Audiologist). That specialty — not the taxonomy code itself — is what Medicare enrollment records and uses for payment. 11,754 practitioners are enrolled under it nationally, and 2 other taxonomy codes map to the same specialty.
Other codes under the same Medicare specialty: 231HA2400X Assistive Technology Practitioner Audiologist; 231HA2500X Assistive Technology Supplier Audiologist.
Related codes
| Code | Audiologist — specializations |
|---|---|
| 231HA2400X | Assistive Technology Practitioner — Medicare 64 Audiologist |
| 231HA2500X | Assistive Technology Supplier — Medicare 64 Audiologist |
History of 231H00000X
NUCC's notes record no dated changes for 231H00000X. The code set is republished every January and July, when codes are added, retitled or marked inactive; this page reflects version 26.1, so check the NUCC site if you are reading it after the next release.
Find providers with 231H00000X
Using 231H00000X
The code goes in the taxonomy field of the NPI application in NPPES, and on claims where a payer asks for it — box 24J (shaded) or 33b on the CMS-1500 with the ZZ qualifier, or the PRV segment of an 837 electronic claim. Payers match it against the taxonomy on the NPI record and, for Medicare, against the specialty on the enrollment, so all three should agree. To see which code a provider uses, search their NPI in the lookup.
Sources: NUCC Health Care Provider Taxonomy code set, version 26.1 (CSV); CMS Medicare Provider and Supplier Taxonomy Crosswalk, August 2026; CMS Medicare Fee-For-Service Public Provider Enrollment, extract of 2026-09-29. Checked 2026-10-24. Methodology.