ICD-10 · PDGM grouping
Q93 Monosomies and deletions from the autosomes, not elsewhere classified
All 14 codes in the Q93 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
14
Can lead a claim
13
Cannot lead a claim
1
What CMS assigns to Q93
13 of the 14 codes group to MMTA - Other; 1 is assigned no clinical group. None of the 14 is assigned a comorbidity subgroup. 13 of the 14 can lead a claim.
Every code in Q93
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 |
|---|---|---|---|---|
| Q93.0 | Whole chromosome monosomy, nonmosaicism (meiotic nondisjunction)CMS: Whole chromosome monosomy,nonmosaic (meiotic nondisjunction) | Can lead a claim | A | None |
| Q93.1 | Whole chromosome monosomy, mosaicism (mitotic nondisjunction)CMS: Whole chromosome monosomy, mosaic (mitotic nondisjunction) | Can lead a claim | A | None |
| Q93.2 | Chromosome replaced with ring, dicentric or isochromosome | Can lead a claim | A | None |
| Q93.3 | Deletion of short arm of chromosome 4 | Can lead a claim | A | None |
| Q93.4 | Deletion of short arm of chromosome 5 | Can lead a claim | A | None |
| Q93.5 Other deletions of part of a chromosome | ||||
| Q93.51 | Angelman syndrome | Can lead a claim | A | None |
| Q93.52 | Phelan-McDermid syndrome | Can lead a claim | A | None |
| Q93.59 | Other deletions of part of a chromosome | Can lead a claim | A | None |
| Q93.7 | Deletions with other complex rearrangements | Can lead a claim | A | None |
| Q93.8 Other deletions from the autosomes | ||||
| Q93.81 | Velo-cardio-facial syndrome | Can lead a claim | A | None |
| Q93.82 | Williams syndrome | Can lead a claim | A | None |
| Q93.88 | Other microdeletions | Can lead a claim | A | None |
| Q93.89 | Other deletions from the autosomes | Can lead a claim | A | None |
| Q93.9 | Deletion from autosomes, unspecified | 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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