Social Worker: NPI taxonomy code 104100000X
Taxonomy code 104100000X is Social Worker, in the Behavioral Health & Social Service Providers group.
140,291 active NPIs list it as their primary specialty (1.5% of all).
| Code | 104100000X |
|---|---|
| Group | Behavioral Health & Social Service Providers |
| Classification | Social Worker |
| Used for | individual providers (the code is in NUCC's Individual section) |
| Active NPIs, primary specialty | 140,291 (137,253 individuals, 3,038 organizations) |
What NUCC says: 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. (excerpt of the NUCC 26.1 definition)
Find Social Worker providers
Search the registry for providers listing Social Worker. Pick a state to narrow it down.
Where they are
| State | Active NPIs | Share |
|---|---|---|
| New York | 23,955 | 17.1% |
| Ohio | 11,544 | 8.2% |
| California | 10,448 | 7.4% |
| Michigan | 9,730 | 6.9% |
| Illinois | 6,046 | 4.3% |
| Florida | 5,626 | 4.0% |
| Massachusetts | 5,618 | 4.0% |
| Pennsylvania | 5,207 | 3.7% |
| New Jersey | 4,396 | 3.1% |
| Maryland | 4,211 | 3.0% |
Top states by practice location, from the NPPES file of September 13, 2026.
Related specialties
- Clinical Social Worker 353,398
- School Social Worker 6,789
Specialty definitions are from the NUCC Health Care Provider Taxonomy (version 26.1). Which code to use on a claim depends on your NPPES record and your payer. See taxonomy codes explained.