Q90.0
BillableTrisomy 21, nonmosaicism (meiotic nondisjunction)
Trisomy 21, nonmosaicism (meiotic nondisjunction)
Coding Notes
Excludes 2
Conditions not included here, but the patient may have both
Use Additional Code
Additional codes that should follow this code
Code Also
A second code may be required; sequencing depends on circumstances
Related Codes(3)
ICD-11 Equivalents(1)
ICD-11 Equivalents
View full mappingCorresponding ICD-11 codes from the WHO crosswalk mapping
Also Known As / Clinical Terms(12)
SNOMED CT
Clinical Terms
- Downs syndrome
- T21 - Trisomy 21
- Whole chromosome trisomy meiotic nondisjunction
- Trisomy 21- meiotic nondisjunction
- Complete trisomy 21 syndrome
Frequently Asked Questions
What is the ICD-10 code for trisomy 21, nonmosaicism (meiotic nondisjunction)?
The ICD-10-CM code for trisomy 21, nonmosaicism (meiotic nondisjunction) is Q90.0. The full clinical description is "Trisomy 21, nonmosaicism (meiotic nondisjunction)". Q90.0 is a billable/specific code that can be used on insurance claims and medical billing.
What does ICD-10 code Q90.0 mean?
ICD-10-CM code Q90.0 represents “Trisomy 21, nonmosaicism (meiotic nondisjunction)”. It is classified under Chapter 17: Congenital Malformations, Deformations and Chromosomal Abnormalities and is a billable/specific code that can be used on a claim.
Is Q90.0 a billable code?
Yes, Q90.0 is a billable/specific ICD-10-CM code and can be used to indicate a diagnosis on a medical claim.
What chapter is Q90.0 in?
Q90.0 is in Chapter 17: Congenital Malformations, Deformations and Chromosomal Abnormalities (codes Q00-Q99).
Are additional codes required with Q90.0?
Yes, when using Q90.0, also report: code(s) to identify any associated degree of intellectual disabilities (F70-F79).
What SNOMED CT codes does Q90.0 map to?
Q90.0 maps to 3 SNOMED CT concepts: 41040004, 205615000, 254269007. SNOMED CT is a clinical terminology used in electronic health records.
What are the UMLS CUIs for Q90.0?
Q90.0 is linked to 1 UMLS Concept Unique Identifier: C2910352. The UMLS (Unified Medical Language System) integrates multiple biomedical vocabularies maintained by the U.S. National Library of Medicine.
How does Q90.0 relate to ICF functioning codes?
ICF (International Classification of Functioning, Disability and Health) codes describe how conditions like trisomy 21, nonmosaicism (meiotic nondisjunction) affect a person's functioning — body functions, activities, participation, and environmental factors. AutoICD provides ICF Core Sets for 12+ conditions and can map clinical text to ICF categories automatically. Browse the ICF directory to explore functioning codes.
What is the ICD-11 equivalent of Q90.0?
Q90.0 maps to the ICD-11 code: LD40.0 (Complete trisomy 21).
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Includes SNOMED Clinical Terms® (SNOMED CT®) used by permission of SNOMED International. Includes content from the UMLS Metathesaurus, courtesy of the U.S. National Library of Medicine.