Q91

Non-Billable

ChapterQ00–Q99

Rankcategory

Official Description

Trisomy 18 and Trisomy 13

Use a more specific code (8 billable)

Metadata & Insights

•Non-billable category (requires more specific sub-code).
•Chapter 17: Congenital Malformations, Deformations and Chromosomal Abnormalities (Q00-Q99).

Excludes2(Not included here. Code separately if applicable.)

Excludes2(Not included here. Code separately if applicable.)

BillableHas subcodes

CH17Congenital malformations, deformations and chromosomal abnormalities (Q00-QA0)

Q90-Q99Chromosomal abnormalities, not elsewhere classified (Q90-Q99)

Q91Trisomy 18 and Trisomy 13Not billable

Q91.0Trisomy 18, nonmosaicism (meiotic nondisjunction)Billable

Q91.1Trisomy 18, mosaicism (mitotic nondisjunction)Billable

Q91.2Trisomy 18, translocationBillable

Q91.3Trisomy 18, unspecifiedBillable

Q91.4Trisomy 13, nonmosaicism (meiotic nondisjunction)Billable

Q91.5Trisomy 13, mosaicism (mitotic nondisjunction)Billable

Q91.6Trisomy 13, translocationBillable

Q91.7Trisomy 13, unspecifiedBillable

The following parent sections contain instructions or notes that apply to Q91:

Chromosomal abnormalities, not elsewhere classified (Q90-Q99)

chapterCH17

Congenital malformations, deformations and chromosomal abnormalities (Q00-QA0)

2026

No direct MS-DRG triggers identified.

Find surgical and procedural codes related to Trisomy 18 and Trisomy 13.