Behavioral Health & Social Service Providers / 103TH0100X
Individual · specialization · Medicare specialty 62
103TH0100X Health Service Psychologist
103TH0100X is the taxonomy code for Health Service, a specialization of Psychologist, in the NUCC group “Behavioral Health & Social Service Providers”. It is a code for individual providers — the kind used on a Type 1 NPI. Medicare maps it to specialty 62, Psychologist, Clinical, under which 1,025 practitioners are enrolled.
- 1Taxonomy code 103TH0100X
- 2Level Specialization
- 3Medicare specialty 62 Psychologist, Clinical
- 4Codes in this group 40
Definition
A psychologist, certified/licensed at the independent practice level in his/her state, who is duly trained and experienced in the delivery of direct, preventative, assessment, and therapeutic intervention services to individuals whose growth, adjustment, or functioning is actually impaired or is demonstrably at high risk of impairment (1974).
— NUCC Health Care Provider Taxonomy, version 26.1
Where 103TH0100X sits
- Group: Behavioral Health & Social Service Providers — code 29 of 40 in the group
- Classification: Psychologist 103T00000X
- Specialization: Health Service 103TH0100X
Choose 103TH0100X over the general Psychologist code (103T00000X) when the provider's training or certification is specifically in health service; the general code covers the classification as a whole. A provider may report more than one taxonomy code on an NPI but marks one as primary.
Medicare
CMS's taxonomy crosswalk links 103TH0100X to Medicare specialty 62 (Psychologist, Clinical). That specialty — not the taxonomy code itself — is what Medicare enrollment records and uses for payment. 1,025 practitioners are enrolled under it nationally, and 23 other taxonomy codes map to the same specialty.
Other codes under the same Medicare specialty: 103T00000X Psychologist; 103TA0400X Addiction (Substance Use Disorder) Psychologist; 103TA0700X Adult Development & Aging Psychologist; 103TB0200X Cognitive & Behavioral Psychologist; 103TC0700X Clinical Psychologist; 103TC1900X Counseling Psychologist; 103TC2200X Clinical Child & Adolescent Psychologist; 103TE1000X Psychologist; and 15 more.
Related codes
| Code | Psychologist — other specializations |
|---|---|
| 103TF0200X | Forensic |
| 103TP2701X | Group Psychotherapy |
| 103TH0004X | Health |
| 103TM1700X | Men & Masculinity |
| 103TM1800X | Intellectual & Developmental Disabilities |
| 103TP0016X | Prescribing (Medical) |
The nearest 6 of 21 other codes under Psychologist; all are on the group page.
History of 103TH0100X
NUCC's earliest recorded change to 103TH0100X is from 2006 (modified title, added definition).
- 2006-07-01 — modified title, added definition
Find providers with 103TH0100X
Using 103TH0100X
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.