3104A0625X Assisted Living Facility (Mental Illness)

Definition

A facility providing supportive services to individuals who can function independently in most areas of activity, but need special guidance, assistance and/or monitoring as the result of a psychiatric problem. This type of facility requires a staff with special training in mental health training and dealing with psychiatric emergencies.

— NUCC Health Care Provider Taxonomy, version 26.1

Where 3104A0625X sits

• Group: Nursing & Custodial Care Facilities — code 4 of 13 in the group
• Classification: Assisted Living Facility 310400000X
• Specialization: Assisted Living, Mental Illness 3104A0625X

Choose 3104A0625X over the general Assisted Living Facility code (310400000X) when the provider's training or certification is specifically in assisted living, mental illness; 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

3104A0625X 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

History of 3104A0625X

3104A0625X was added to the code set in 2003.

• 2003-07-01 — new

Similar codes in other groups

If 3104A0625X 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)
• 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)
• 364SP0809X Adult Psychiatric/Mental Health Clinical Nurse Specialist (Physician Assistants & Advanced Practice Nursing Providers)

Using 3104A0625X

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.