Q91.3
BillableTrisomy 18, unspecified
Trisomy 18, unspecified
Coding Notes
Excludes 2
Conditions not included here, but the patient may have both
Related Codes(7)
Q91.0Trisomy 18, nonmosaicism (meiotic nondisjunction)
Q91.1Trisomy 18, mosaicism (mitotic nondisjunction)
Q91.2Trisomy 18, translocation
Q91.4Trisomy 13, nonmosaicism (meiotic nondisjunction)
Q91.5Trisomy 13, mosaicism (mitotic nondisjunction)
Q91.6Trisomy 13, translocation
Q91.7Trisomy 13, unspecified
ICD-11 Equivalents(1)
ICD-11 Equivalents
View full mappingCorresponding ICD-11 codes from the WHO crosswalk mapping
Also Known As / Clinical Terms(21)
SNOMED CT
- Complete trisomy 18 syndrome51500006
- Edwards syndrome51500006
- 18q partial trisomy syndrome66985009
- Grouchy-Lamy-Salmon-Landry syndrome66985009
- Duplication of chromosome 18726357009
- Partial trisomy of chromosome 18726357009
- Distal duplication 18q782676009
- Distal trisomy 18q782676009
- Telomeric duplication 18q782676009
- Proximal duplication of long arm of chromosome 181003868002
Clinical Terms
- Partial trisomy of chromosome 18
- Telomeric duplication 18q
- Duplication of chromosome 18
- Distal duplication 18q
- Proximal duplication of long arm of chromosome 18
- 18q partial trisomy syndrome
- Complete trisomy 18 syndrome
- Grouchy-Lamy-Salmon-Landry syndrome
- Distal trisomy 18q
- Edwards syndrome
Frequently Asked Questions
What is the ICD-10 code for trisomy 18, unspecified?
The ICD-10-CM code for trisomy 18, unspecified is Q91.3. The full clinical description is "Trisomy 18, unspecified". Q91.3 is a billable/specific code that can be used on insurance claims and medical billing.
What does ICD-10 code Q91.3 mean?
ICD-10-CM code Q91.3 represents “Trisomy 18, 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 Q91.3 a billable code?
Yes, Q91.3 is a billable/specific ICD-10-CM code and can be used to indicate a diagnosis on a medical claim.
What chapter is Q91.3 in?
Q91.3 is in Chapter 17: Congenital Malformations, Deformations and Chromosomal Abnormalities (codes Q00-Q99).
What SNOMED CT codes does Q91.3 map to?
Q91.3 maps to 5 SNOMED CT concepts: 66985009, 51500006, 782676009, 726357009, 1003868002. SNOMED CT is a clinical terminology used in electronic health records.
What are the UMLS CUIs for Q91.3?
Q91.3 is linked to 1 UMLS Concept Unique Identifier: C4760370. The UMLS (Unified Medical Language System) integrates multiple biomedical vocabularies maintained by the U.S. National Library of Medicine.
How does Q91.3 relate to ICF functioning codes?
ICF (International Classification of Functioning, Disability and Health) codes describe how conditions like trisomy 18, 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 Q91.3?
Q91.3 maps to the ICD-11 code: LD40.2 (Complete trisomy 18).
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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.