Nursing & Custodial Care Facilities / 310500000X
Non-Individual · classification
310500000X Mental Illness Intermediate Care Facility
310500000X is the taxonomy code for Intermediate Care Facility, Mental Illness, in the NUCC group “Nursing & Custodial Care Facilities”. It is a code for organizations — the kind used on a Type 2 NPI. It has no entry in the CMS Medicare taxonomy crosswalk.
- 1Taxonomy code 310500000X
- 2Level Classification
- 3Medicare specialty Not in the crosswalk
- 4Codes in this group 13
Definition
A nursing facility that provides an intermediate level of nursing care to individuals whose functional abilities are significantly compromise by mental illness.
— NUCC Health Care Provider Taxonomy, version 26.1
Where 310500000X sits
- Group: Nursing & Custodial Care Facilities — code 10 of 13 in the group
- Classification: Intermediate Care Facility, Mental Illness 310500000X
Intermediate Care Facility, Mental Illness has no specializations, so 310500000X is the only code for it. A provider may report more than one taxonomy code on an NPI but marks one as primary.
Medicare
310500000X 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 — organizations of this type enroll, if at all, under a facility or supplier type rather than a practitioner specialty.
Related codes
No other codes share the classification Intermediate Care Facility, Mental Illness. The rest of Nursing & Custodial Care Facilities is on the group page.
History of 310500000X
310500000X was added to the code set in 2003.
- 2003-07-01 — new
Similar codes in other groups
If 310500000X 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:
- 101YM0800X Mental Health Counselor (Behavioral Health & Social Service Providers)
- 146M00000X Intermediate Emergency Medical Technician (Emergency Medical Service Providers)
- 163WP0808X Psychiatric/Mental Health Registered Nurse (Nursing Service Providers)
- 163WP0809X Adult Psychiatric/Mental Health Registered Nurse (Nursing Service Providers)
- 163WP0807X Child & Adolescent Psychiatric/Mental Health Registered Nurse (Nursing Service Providers)
- 364SP0808X Psychiatric/Mental Health Clinical Nurse Specialist (Physician Assistants & Advanced Practice Nursing Providers)
Find providers with 310500000X
Using 310500000X
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.