Nursing & Custodial Care Facilities / 310400000X
Non-Individual · classification
310400000X Assisted Living Facility
310400000X is the taxonomy code for Assisted Living Facility, 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 310400000X
- 2Level Classification
- 3Medicare specialty Not in the crosswalk
- 4Codes in this group 13
Definition
A facility providing supportive services to individuals who can function independently in most areas of activity, but need assistance and/or monitoring to assure safety and well being.
— NUCC Health Care Provider Taxonomy, version 26.1
Where 310400000X sits
- Group: Nursing & Custodial Care Facilities — code 2 of 13 in the group
- Classification: Assisted Living Facility 310400000X
This is the general code for Assisted Living Facility. 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
310400000X 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
| Code | Assisted Living Facility — specializations |
|---|---|
| 3104A0630X | Assisted Living, Behavioral Disturbances |
| 3104A0625X | Assisted Living, Mental Illness |
History of 310400000X
310400000X was added to the code set in 2003.
- 2003-07-01 — new
Similar codes in other groups
If 310400000X 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:
- 261QA0005X Ambulatory Family Planning Facility (Ambulatory Health Care Facilities)
- 261QA0006X Ambulatory Fertility Facility (Ambulatory Health Care Facilities)
- 261QR0401X Comprehensive Outpatient Rehabilitation Facility (CORF) (Ambulatory Health Care Facilities)
- 320800000X Mental Illness Community Based Residential Treatment Facility (Residential Treatment Facilities)
- 320900000X Intellectual and/or Developmental Disabilities Community Based Residential Treatment Facility (Residential Treatment Facilities)
- 323P00000X Psychiatric Residential Treatment Facility (Residential Treatment Facilities)
Find providers with 310400000X
Using 310400000X
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.