Search Browse Crosswalk Fees Tools Pricing

Codelle

AI-powered medical coding assistant for healthcare practices and billers.

Pricing Privacy Terms

© 2026 Codelle. All rights reserved.

CPT® copyright 2026 American Medical Association. All rights reserved. CPT is a registered trademark of the American Medical Association. Applicable FARS/DFARS restrictions apply to government use. Fee schedules, relative value units, conversion factors and/or related components are not assigned by the AMA, are not part of CPT, and the AMA is not recommending their use.

ICD-10-CM Q90 — Down syndrome | Codelle

Q90

ICD-10-CM

Down syndrome

Clinical Notes

Use additional code

code(s) to identify any associated degree of intellectual disabilities (F70-F79)

Code also

associated physical condition(s), such as atrioventricular septal defect (Q21.2-)

Code Hierarchy

Subcodes (4)

Q90.0Trisomy 21, nonmosaicism (meiotic nondisjunction)

Q90.1Trisomy 21, mosaicism (mitotic nondisjunction)

Q90.2Trisomy 21, translocation

Q90.9Down syndrome, unspecified

Same Category

Q90.0Trisomy 21, nonmosaicism (meiotic nondisjunction)Q90.1Trisomy 21, mosaicism (mitotic nondisjunction)Q90.2Trisomy 21, translocation Q90.9Down syndrome, unspecified