ICD-10-CM › Q00-QA1 › Q80-Q89 › Q89 Other congenital malformations,... › Q89.4
Q89.4
Conjoined twins
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 2007 to now. Entries marked draft are from the pre-implementation releases: ICD-10 took effect on 1 October 2015, so nothing before FY2016 was ever valid on a claim.
- FY2007 Added to the draft code set draft Conjoined twins
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.
- Fused
- Union, abnormal
- Segmentation, incomplete
- Syndrome > cardiorenal Note:
- Failure, failed > segmentation
- Syndrome > cardiovascular renal Note:
- Janiceps
- Pygopagus
- Epignathus
- Xiphopagus
- Craniopagus
- Ischiopagus
- Sternopagus
- Syncephalus
- Siamese twin
- Thoracopagus
- Conjoined twins
- Double > monster
- Parasitic > twin
- Twin > conjoined
- Dicephalus, dicephaly
- Fusion, fused > twins
- Monster, monstrosity > twin
- Rudimentary > respiratory organs in thoracopagus
Codes in the same group
| Code | Description | Status |
|---|---|---|
| Q89.0 | Congenital absence and malformations of spleen | Not billable |
| Q89.1 | Congenital malformations of adrenal gland | Valid |
| Q89.2 | Congenital malformations of other endocrine glands | Valid |
| Q89.3 | Situs inversus | Valid |
| Q89.7 | Multiple congenital malformations, not elsewhere classified | Valid |
| Q89.8 | Other specified congenital malformations | Not billable |
| Q89.9 | Congenital malformation, unspecified | Valid |