All ICD10 Codes

Q90-Q99

Non-Billable
ChapterQ00–Q99
Rankblock
Official Description

Chromosomal abnormalities, not elsewhere classified (Q90-Q99)

Use a more specific code (0 billable, 9 non-billable)
Q90Down syndromehas subcodesQ91Trisomy 18 and Trisomy 13has subcodesQ92Other trisomies and partial trisomies of the autosomes, not elsewhere classifiedhas subcodesQ93Monosomies and deletions from the autosomes, not elsewhere classifiedhas subcodesQ95Balanced rearrangements and structural markers, not elsewhere classifiedhas subcodesQ96Turner's syndromehas subcodesQ97Other sex chromosome abnormalities, female phenotype, not elsewhere classifiedhas subcodesQ98Other sex chromosome abnormalities, male phenotype, not elsewhere classifiedhas subcodesQ99Other chromosome abnormalities, not elsewhere classifiedhas subcodes
Metadata & Insights
  • •Non-billable category (requires more specific sub-code).
  • •Chapter 17: Congenital Malformations, Deformations and Chromosomal Abnormalities (Q00-Q99).

CH17 Parent Instructions

Excludes2(Not included here. Code separately if applicable.)
  • inborn errors of metabolism (E70-E88)

Instructional Notes

Excludes2(Not included here. Code separately if applicable.)
  • mitochondrial metabolic disorders (E88.4-)

Clinical Hierarchy

BillableHas subcodes
CH17Congenital malformations, deformations and chromosomal abnormalities (Q00-QA0)
Q90-Q99Chromosomal abnormalities, not elsewhere classified (Q90-Q99)Not billable
Q90Down syndromeSubcodes
Q91Trisomy 18 and Trisomy 13Subcodes
Q92Other trisomies and partial trisomies of the autosomes, not elsewhere classifiedSubcodes
Q93Monosomies and deletions from the autosomes, not elsewhere classifiedSubcodes
Q95Balanced rearrangements and structural markers, not elsewhere classifiedSubcodes
Q96Turner's syndromeSubcodes
Q97Other sex chromosome abnormalities, female phenotype, not elsewhere classifiedSubcodes
Q98Other sex chromosome abnormalities, male phenotype, not elsewhere classifiedSubcodes
Q99Other chromosome abnormalities, not elsewhere classifiedSubcodes

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to Q90-Q99:

chapterCH17
Congenital malformations, deformations and chromosomal abnormalities (Q00-QA0)
View context instructions

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

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