ICD-10-CM · Chapter 17 · Q00–Q99
Q91.0
Trisomy 18, nonmosaicism (meiotic nondisjunction)
Congenital malformations, deformations and chromosomal abnormalities
Quick facts
- Code
- Q91.0
- Type
- Billable code
- ICD-10-CM chapter
- Chapter 17 — Congenital malformations, deformations and chromosomal abnormalities
- Category
- Q91 — Trisomy 18 and Trisomy 13
- Specificity
- 4 characters
How coders use this code
ICD-10-CM Q91.0 is a billable, fully specified code, so it can be reported directly on a claim to document a diagnosis of trisomy 18, nonmosaicism (meiotic nondisjunction). Coders assign it when the chart documentation supports this level of detail, always matching to the most specific code available and verifying against the chapter-specific guidelines published annually by NCHS/CMS.
Related codes in Q91
- Q91Trisomy 18 and Trisomy 13
- Q91.1Trisomy 18, mosaicism (mitotic nondisjunction)
- Q91.2Trisomy 18, translocation
- Q91.3Trisomy 18, unspecified
- Q91.4Trisomy 13, nonmosaicism (meiotic nondisjunction)
- Q91.5Trisomy 13, mosaicism (mitotic nondisjunction)
- Q91.6Trisomy 13, translocation
- Q91.7Trisomy 13, unspecified
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