Q90-Q99
Chromosomal abnormalities, not elsewhere classified
Chromosomal abnormalities, not elsewhere classified (Q90-Q99) is a block within ICD-10-CM Chapter 17: Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders. It holds 9 categories.
Excludes2
Not included here. The condition is not part of this code, but a patient may have both, and both codes may be reported together.
- mitochondrial metabolic disorders (E88.4-)
Categories in Q90-Q99
- Q90Down syndromecategory
- Q91Trisomy 18 and Trisomy 13category
- Q92Oth trisomies and partial trisomies of the autosomes, NECcategory
- Q93Monosomies and deletions from the autosomes, NECcategory
- Q95Balanced rearrangements and structural markers, NECcategory
- Q96Turner's syndromecategory
- Q97Oth sex chromosome abnormalities, female phenotype, NECcategory
- Q98Oth sex chromosome abnormalities, male phenotype, NECcategory
- Q99Other chromosome abnormalities, not elsewhere classifiedcategory
Source
ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.