NUCC taxonomy code
104100000X - Social Worker
104100000X is the NUCC provider taxonomy code for Social Worker (individual providers). 138,355 providers in our latest NPPES snapshot list it as their primary taxonomy.
138,355
providers · primary taxonomy
Code breakdown
Taxonomy code 104100000X
Display name Social Worker
Grouping Behavioral Health & Social Service Providers
Classification Social Worker
Section Individual
Directory Social Worker provider directory
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.
Definition from the NUCC Health Care Provider Taxonomy code set.
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Related taxonomy codes
1041C0700X Clinical Social Worker (Social Worker) 1041S0200X School Social Worker (Social Worker) 106E00000X Assistant Behavior Analyst 106S00000X Behavior Technician 103K00000X Behavior Analyst 103G00000X Clinical Neuropsychologist 103GC0700X Clinical Neuropsychologist (Clinical Neuropsychologist) 101Y00000X Counselor
Frequently asked questions
What does taxonomy code 104100000X mean?
104100000X is the NUCC Health Care Provider Taxonomy code for Social Worker in the "Behavioral Health & Social Service Providers" grouping. It classifies individual providers.
Where is the taxonomy code used?
Providers select a taxonomy code when applying for an NPI, and it appears on insurance claims (CMS-1500 box 33b / 837 electronic claims) to identify the provider's classification. Payers may require the taxonomy that matches your credential and license.
How do I find providers with taxonomy 104100000X?
Browse the Social Worker directory, or use the NPI search and filter by state.
Source: CMS NPPES (public data). Snapshot 2026-07-13.