Q90.9
BillableDown syndrome, unspecified
Down syndrome, unspecified
Coding Notes
Inclusion Terms
Alternative clinical terms for this condition
- Trisomy 21 NOS
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(128)
SNOMED CT
- Complete trisomy 21 syndrome41040004
- Down syndrome41040004
- Downs syndrome41040004
- T21 - Trisomy 2141040004
- Leukaemoid reaction56478004
- Leukemoid reaction56478004
- Infantile pseudoleukaemia191273000
- Infantile pseudoleukemia191273000
- Leukaemoid reaction of the newborn191273000
- Leukemoid reaction of the newborn191273000
- 21q partial distal trisomy227035005
- 21q partial trisomy228050004
- Transient neonatal pustular melanosis239092005
- Transient neonatal pustulosis239092005
- Down facies248199009
- Down's facies248199009
- Partial trisomy 21 in Down syndrome254264002
- Partial trisomy 21 in Down's syndrome254264002
- Trisomy 21 - translocation254264002
- Transient abnormal myelopoiesis721307000
- Dementia due to chromosomal anomaly722980006
- Transient abnormal myelopoiesis and Down syndrome724643004
- Transient abnormal myelopoiesis co-occurrent with Down syndrome724643004
- Myeloid leukaemia and Down syndrome724644005
- Myeloid leukaemia associated with Down syndrome724644005
- Myeloid leukaemia co-occurrent with Down syndrome724644005
- Myeloid leukemia and Down syndrome724644005
- Myeloid leukemia associated with Down syndrome724644005
- Myeloid leukemia co-occurrent with Down syndrome724644005
- Duplication of chromosome 21726361003
- Partial trisomy of chromosome 21726361003
- Dementia co-occurrent and due to Down syndrome733194007
- Dementia with Down syndrome733194007
- Down syndrome co-occurrent with leukaemoid reaction associated transient neonatal pustulosis840505007
- Down syndrome co-occurrent with leukemoid reaction associated transient neonatal pustulosis840505007
- Distal duplication of chromosome 21897545002
- Distal partial trisomy 21897545002
- Proximal duplication of chromosome 211003905001
- Periodontitis exacerbated by Down syndrome1184621000
- Periodontitis exacerbated by Down's syndrome1184621000
UMLS
- 21 trisomiesC0013080
- 21 trisomyC0013080
- 47,XX,+21C0013080
- 47,XY,+21C0013080
- DOWN SYNDROMEC0013080
- Down SyndromeC0013080
- Down syndromeC0013080
- Down syndrome, unspecifiedC0013080
- Down's SyndromeC0013080
- Down's syndromeC0013080
- Downs SyndromeC0013080
- Downs syndromeC0013080
- MongolismC0013080
- Syndrome Down'sC0013080
- Syndrome, DownC0013080
- Syndrome, Down'sC0013080
- TRISOMY 21C0013080
- Trisomy 21C0013080
- Trisomy 21 (Down Syndrome)C0013080
- Trisomy 21 (morphologic abnormality)C0013080
- Trisomy 21 NOSC0013080
- Trisomy 21 SyndromeC0013080
- Trisomy GC0013080
- down s syndromeC0013080
- downing syndromeC0013080
- mongolismC0013080
- mongoloidismC0013080
- morbus downC0013080
- trisomy 21C0013080
- trisomy 21 syndromeC0013080
Clinical Terms
- Transient abnormal myelopoiesis
- Trisomy 21 NOS
- Down syndrome co-occurrent with leukemoid reaction associated transient neonatal pustulosis
- down s syndrome
- T21 - Trisomy 21
- Partial trisomy 21 in Down syndrome
- 21 trisomy
- Trisomy 21 Syndrome
- morbus down
- Down syndrome co-occurrent with leukaemoid reaction associated transient neonatal pustulosis
- Complete trisomy 21 syndrome
- Mongolism
- 21 trisomies
- trisomy 21
- Dementia co-occurrent and due to Down syndrome
- 21q partial distal trisomy
- Distal partial trisomy 21
- Syndrome, Down
- Myeloid leukaemia associated with Down syndrome
- Distal duplication of chromosome 21
- 21q partial trisomy
- Transient abnormal myelopoiesis and Down syndrome
- Down's syndrome
- Duplication of chromosome 21
- Periodontitis exacerbated by Down's syndrome
- Myeloid leukemia co-occurrent with Down syndrome
- Dementia due to chromosomal anomaly
- Myeloid leukaemia co-occurrent with Down syndrome
- Myeloid leukemia and Down syndrome
- Syndrome, Down's
- Infantile pseudoleukemia
- Trisomy 21 (Down Syndrome)
- downing syndrome
- Downs Syndrome
- Partial trisomy of chromosome 21
- Leukemoid reaction of the newborn
- Partial trisomy 21 in Down's syndrome
- Leukaemoid reaction
- Trisomy 21 (morphologic abnormality)
- Leukaemoid reaction of the newborn
- 47,XY,+21
- 47,XX,+21
- Leukemoid reaction
- Down's facies
- Proximal duplication of chromosome 21
- Myeloid leukaemia and Down syndrome
- Dementia with Down syndrome
- mongoloidism
- Periodontitis exacerbated by Down syndrome
- Myeloid leukemia associated with Down syndrome
- Transient neonatal pustular melanosis
- Transient neonatal pustulosis
- Trisomy G
- Transient abnormal myelopoiesis co-occurrent with Down syndrome
- Trisomy 21 - translocation
- Down facies
- Syndrome Down's
- Infantile pseudoleukaemia
Frequently Asked Questions
What is the ICD-10 code for down syndrome, unspecified?
The ICD-10-CM code for down syndrome, unspecified is Q90.9. The full clinical description is "Down syndrome, unspecified". Q90.9 is a billable/specific code that can be used on insurance claims and medical billing.
What does ICD-10 code Q90.9 mean?
ICD-10-CM code Q90.9 represents “Down syndrome, unspecified”. 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 Q90.9 a billable code?
Yes, Q90.9 is a billable/specific ICD-10-CM code and can be used to indicate a diagnosis on a medical claim.
What chapter is Q90.9 in?
Q90.9 is in Chapter 17: Congenital Malformations, Deformations and Chromosomal Abnormalities (codes Q00-Q99).
Are additional codes required with Q90.9?
Yes, when using Q90.9, also report: code(s) to identify any associated degree of intellectual disabilities (F70-F79).
What SNOMED CT codes does Q90.9 map to?
Q90.9 maps to 18 SNOMED CT concepts: 227035005, 228050004, 41040004, 733194007, 722980006, and 13 more. SNOMED CT is a clinical terminology used in electronic health records.
What are the UMLS CUIs for Q90.9?
Q90.9 is linked to 1 UMLS Concept Unique Identifier: C0013080. The UMLS (Unified Medical Language System) integrates multiple biomedical vocabularies maintained by the U.S. National Library of Medicine.
How does Q90.9 relate to ICF functioning codes?
ICF (International Classification of Functioning, Disability and Health) codes describe how conditions like down syndrome, unspecified 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 Q90.9?
Q90.9 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.