Q90.0
Billable codeTrisomy 21, nonmosaicism (meiotic nondisjunction)
The ICD-10 code for trisomy 21, nonmosaicism (meiotic nondisjunction) is Q90.0.
Documentation support
General coding-documentation guidance — not a substitute for payer-specific requirements or professional coding judgment.
- •As a general rule, code to the highest level of specificity supported by the documentation in the medical record.
Related codes in this category
- Q90.1Trisomy 21, mosaicism (mitotic nondisjunction)
- Q90.2Trisomy 21, translocation
- Q90.9Down syndrome, unspecified
- Q90.0Trisomy 21, nonmosaicism (meiotic nondisjunction)
ICD-9-CM equivalent
Informational only — GEM mappings are approximate, not guaranteed one-to-one equivalents. Verify before use in billing.
- 7580Approximate match
Associated MS-DRGs
Q90.0 can serve as the principal diagnosis for these Medicare Severity Diagnosis-Related Groups.
Informational only — actual DRG assignment also depends on procedures, complications/comorbidities (CC/MCC), discharge status, and payer-specific rules not reflected here.