ICD-10 · PDGM grouping
Z81 Family history of mental and behavioral disorders
All 6 codes in the Z81 family, with the PDGM clinical group, comorbidity subgroup and primary-position rule CMS assigns, read from the CMS grouper crosswalk v07.2.26 and the CDC FY2027 code file.
Codes in family
6
Can lead a claim
0
Cannot lead a claim
6
What CMS assigns to Z81
None of the 6 codes is assigned a clinical group. None of the 6 is assigned a comorbidity subgroup. None can lead a claim.
Every code in Z81
Descriptions are CDC’s FY2027 wording; where CMS’s grouper abbreviates one, its form is shown beneath.
| Code | Description | Primary position | Clinical group | Comorbidity subgroup |
|---|---|---|---|---|
| Z81.0 | Family history of intellectual disabilities | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| Z81.1 | Family history of alcohol abuse and dependence | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| Z81.2 | Family history of tobacco abuse and dependence | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| Z81.3 | Family history of other psychoactive substance abuse and dependenceCMS: Family history of psychoactv substance abuse and dependence | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| Z81.4 | Family history of other substance abuse and dependence | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| Z81.8 | Family history of other mental and behavioral disorders | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
Sources: CMS HH PPS Grouper Software v07.2.26, effective 2026-10-01, for the clinical group, comorbidity subgroup, code-first conventions and primary-position flags; CDC NCHS ICD-10-CM FY2027 code descriptions for the family title and code wording. This is the crosswalk Medicare runs a claim through. Grouping also depends on admission source, timing, the OASIS functional items and the rest of the diagnosis list.
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