Behavioral Health & Social Service Providers / 104100000X
Individual · classification
104100000X Social Worker
104100000X is the taxonomy code for Social Worker, in the NUCC group “Behavioral Health & Social Service 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 104100000X
- 2Level Classification
- 3Medicare specialty Not in the crosswalk
- 4Codes in this group 40
Definition
A social worker is a person who is qualified by a Social Work degree, and licensed, certified or registered by the state as a social worker to practice within the scope of that license. A social worker provides assistance and counseling to clients and their families who are dealing with social, emotional and environmental problems. Social work services may be rendered to individuals, families, groups, and the public.
— NUCC Health Care Provider Taxonomy, version 26.1
Where 104100000X sits
- Group: Behavioral Health & Social Service Providers — code 38 of 40 in the group
- Classification: Social Worker 104100000X
This is the general code for Social Worker. 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
104100000X 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
| Code | Social Worker — specializations |
|---|---|
| 1041C0700X | Clinical |
| 1041S0200X | School |
History of 104100000X
NUCC's earliest recorded change to 104100000X is from 2009 (definition modified).
- 2009-07-01 — definition modified
Similar codes in other groups
If 104100000X 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:
- 172V00000X Community Health Worker (Other Service Providers)
Find providers with 104100000X
Using 104100000X
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.