Excludes1 pair
Q92.2 vs Q92.5
Q92.2 and Q92.5 are not coded together. ICD-10-CM declares them mutually exclusive with an Excludes1 note — the two conditions are not expected to occur together, so exactly one of them is normally correct for a given encounter. The Official Guidelines carve out one exception: if the two conditions are clearly unrelated to each other, both may be reported.
The official note, declared on Q92.2
partial trisomy due to unbalanced translocation (Q92.5)
Q92.2
Partial trisomy
Billable
- Chapter 17
- Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders
- Section
- Q90-Q99
Use when the record says
- Less than whole arm duplicated
- Whole arm or more duplicated
Indexed under
- Trisomy › chromosome specified NEC › partial
Q92.5
Duplications with other complex rearrangements
Billable
- Chapter 17
- Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders
- Section
- Q90-Q99
Use when the record says
- Partial trisomy due to unbalanced translocations
Indexed under
- Accessory › chromosome › with complex rearrangements NEC
- Duplication, duplex › chromosome NEC › with complex rearrangements NEC
- Trisomy › chromosome specified NEC › partial › due to unbalanced translocation
Excludes1 is not always absolute: where two conditions covered by the note are genuinely unrelated, CMS guidance permits reporting both. Document the reasoning rather than assuming it. More on Excludes1 vs Excludes2 · FY2027