ICD-10-CM 2027
ICD-10 code for down syndrome translocation
From the official ICD-10-CM alphabetic index entry “Translocation › Down syndrome”. Page updated September 29, 2026.
About coding down syndrome translocation
The ICD-10-CM code for down syndrome translocation is Q90.2 (Trisomy 21, translocation).
Within Q90 (down syndrome), Q90.2 is specifically for trisomy 21, translocation. Related codes cover trisomy 21, nonmosaicism (meiotic nondisjunction) (Q90.0), trisomy 21, mosaicism (mitotic nondisjunction) (Q90.1) and unspecified (Q90.9).
Use an additional code(s) to identify any associated degree of intellectual disabilities (F70-F79).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
Common questions about down syndrome translocation ICD-10 codes
What is the ICD-10 code for down syndrome translocation?
- Q90.2 — Trisomy 21, translocation.
Is Q90.2 billable?
- Yes. Q90.2 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can Q90.2 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict Q90.2 as a principal diagnosis.
Is Q90.2 a CC or MCC?
- No. Q90.2 is neither a CC nor an MCC under MS-DRG v44.0.