Q90 ICD-10-CM Code: Down syndrome
A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.
Official description
Q90Down syndrome
ICD-10-CM diagnosis code · United States clinical modification
Where Q90 sits
- 1
Chapter 17
Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders (Q00-QA1)
- 2
Section
Chromosomal abnormalities, not elsewhere classified (Q90-Q99)
- 3
Category Q90
Down syndrome
- 4
Code Q90
Down syndrome
Codes under Q90
Q90 is a non-billable category. Choose the child code that best matches the documented diagnosis.
Notes for this code
Inclusion terms
No inclusion terms are listed for Q90.
Code first
No “code first” instruction is listed for Q90.
Use additional code
- code(s) to identify any associated degree of intellectual disabilities (F70-F79)
Excludes1
Conditions that should not be reported together with this code.
No Excludes1 note is listed for Q90.
Excludes2
Conditions not included here that may be reported separately when present.
No Excludes2 note is listed for Q90.
Source and release
- Data release
- U.S. ICD-10-CM · FY 2027
- Effective date
- Oct 1, 2026
- Publisher
- Vero Scribe Inc.
This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.
Frequently asked questions
What does ICD-10-CM code Q90 mean?
Q90 is the FY 2027 U.S. ICD-10-CM code for “Down syndrome.”
Is Q90 a billable or specific ICD-10-CM code?
No. Q90 has more specific child codes in the FY 2027 reference data. Select the code that matches the documentation and confirm the active code set and payer requirements.
Where is Q90 located in ICD-10-CM?
Q90 is listed in Chapter 17, Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders (Q00-QA1), within Chromosomal abnormalities, not elsewhere classified (Q90-Q99) (Q90–Q99), under category Q90, Down syndrome.
What coding notes are listed for Q90?
No inclusion terms are listed for Q90 in this reference record. No code-first instruction is listed. Additional-code instructions: code(s) to identify any associated degree of intellectual disabilities (F70-F79). No Excludes1 note is listed. No Excludes2 note is listed.