MCMedicalCodingSoftware
Q90

Q90: Down syndrome

Non-billable headerICD-10-CM

Q90 is a non-billable header ICD-10-CM code for down syndrome. It cannot be billed on its own: choose one of the more specific child codes below.

Use additional code

Add a secondary code to capture the detail described below.

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

Code also

Both codes may be needed to describe the encounter fully. Sequencing depends on the reason for the visit.

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

Other codes that can never be billed with Q90

Their own Excludes1 notes name this code, so the conflict is not listed above.

  • E25Adrenogenital disorders
  • Q92Other trisomies and partial trisomies of the autosomes, not elsewhere classified
  • Z15Genetic susceptibility to disease

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Code history

Unchanged in every release from FY2024 to FY2027.

Code to one of these instead Q90

4 child codes. Green means billable.

ICD-10-CMFY2027· effective October 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release: see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.