Dental Providers / 124Q00000X
Individual · classification
124Q00000X Dental Hygienist
124Q00000X is the taxonomy code for Dental Hygienist, in the NUCC group “Dental Providers”. It is a code for individual providers — the kind used on a Type 1 NPI. It has no entry in the CMS Medicare taxonomy crosswalk.
- 1Taxonomy code 124Q00000X
- 2Level Classification
- 3Medicare specialty Not in the crosswalk
- 4Codes in this group 20
Definition
An individual who has completed an accredited dental hygiene education program, and an individual who has been licensed by a state board of dental examiners to provide preventive care services under the supervision of a dentist. Functions that may be legally delegated to the dental hygienist vary based on the needs of the dentist, the educational preparation of the dental hygienist and state dental practice acts and regulations, but always include, at a minimum, scaling and polishing the teeth. To avoid misleading the public, no occupational title other than dental hygienist should be used to describe this dental auxiliary.
— NUCC Health Care Provider Taxonomy, version 26.1
Where 124Q00000X sits
- Group: Dental Providers — code 3 of 20 in the group
- Classification: Dental Hygienist 124Q00000X
Dental Hygienist has no specializations, so 124Q00000X is the only code for it. A provider may report more than one taxonomy code on an NPI but marks one as primary.
Medicare
124Q00000X has no entry in the CMS Medicare Provider and Supplier Taxonomy Crosswalk. That usually means Medicare does not enroll this kind of provider under its own specialty — the provider can still hold an NPI and use this code on claims to other payers.
Related codes
No other codes share the classification Dental Hygienist. The rest of Dental Providers is on the group page.
History of 124Q00000X
NUCC's notes record no dated changes for 124Q00000X. 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.
Similar codes in other groups
If 124Q00000X is not quite right, these codes in other groups share a word with it — often the same field practised by a different kind of provider:
- 261QD0000X Dental Clinic/Center (Ambulatory Health Care Facilities)
- 292200000X Dental Laboratory (Laboratories)
Find providers with 124Q00000X
Using 124Q00000X
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). Checked 2026-10-24. Methodology.