ICD-10-CM 2027
ICD-10 code for autosomes trisomy
From the official ICD-10-CM alphabetic index entry “Trisomy (syndrome) › autosomes”. Page updated September 29, 2026.
About coding autosomes trisomy
The ICD-10-CM code for autosomes trisomy is Q92.9 (Trisomy and partial trisomy of autosomes, unspecified).
Within Q92, choose Q92.9 (Trisomy and partial trisomy of autosomes, unspecified) only when documentation doesn't support a more specific option: whole chromosome trisomy, nonmosaicism (meiotic nondisjunction) (Q92.0), whole chromosome trisomy, mosaicism (mitotic nondisjunction) (Q92.1), partial trisomy (Q92.2), Duplications with other complex rearrangements (Q92.5), marker chromosomes (Q92.6), Triploidy and polyploidy (Q92.7) and other specified trisomies and partial trisomies of autosomes (Q92.8).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 951 (Other Factors Influencing Health Status, relative weight 0.5577), in MDC 23 (Factors Influencing Health Status and Other Contacts with Health Services), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
Common questions about autosomes trisomy ICD-10 codes
What is the ICD-10 code for autosomes trisomy?
- Q92.9 — Trisomy and partial trisomy of autosomes, unspecified.
Is Q92.9 billable?
- Yes. Q92.9 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can Q92.9 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict Q92.9 as a principal diagnosis.
Is Q92.9 a CC or MCC?
- No. Q92.9 is neither a CC nor an MCC under MS-DRG v44.0.