ICD-10-CM › Q00-QA1 › Q90-Q99 › Q99.8 Other specified chromosome abnormalities › Q99.89
Q99.89
Other specified chromosome abnormalities
ValidICD-10-CM diagnosis code.
Valid for claims with a date of service in the current code year.
What has happened to this code
Every change the publisher made, from 2026 to now.
- FY2026 Added to the code set Other specified chromosome abnormalities
Official coding rules
Published by CDC for FY2027. A rule attached to a category binds every code beneath it, so the rules inherited from this code's ancestors are shown with the code they come from.
Inherited from the Q90-Q99 section Chromosomal abnormalities, not elsewhere classified (Q90-Q99)
Excludes2 - not included here
- mitochondrial metabolic disorders (E88.4-)
How CDC's index refers to this code
Wording from the official alphabetic index. Much of it appears nowhere in the code description, which is why a search for the everyday phrase so often finds nothing.
- Cleft
- Extra
- Fused
- Patent
- Trifid
- Triple
- Window
- Aplasia
- Aberrant
- Patulous
- Abnormity
- Asymmetry
- Dysplasia
- Additional
- Herniation
- Lobulation
- Nonclosure
- Nondescent
- Fold, folds
- Rudimentary
- Undescended
- Malformation
- Triplication
- Transposition
- Birth > defect
- Maldevelopment
- Sarcoepiplocele
- Septum, septate
- Union, abnormal
- Imperfect > fusion
- Vestige, vestigial
- Duplication, duplex
- Lesion > congenital
- Pervious, congenital
- Elongated, elongation
- Open, opening > false
- Termination > anomalous
- Heterotopia, heterotopic
- Implantation > anomalous
- Segmentation, incomplete
Showing 40 of 141 index phrases.
Codes in the same group
| Code | Description | Status |
|---|---|---|
| Q99.81 | Usher syndrome | Not billable |