Q99.0 — Chimera 46, XX/46, XY
Q99.0 is a billable, specific ICD-10-CM code for chimera 46, xx/46, xy. It is valid for submission on a claim.
Inclusion terms
Alternative wordings a physician may use in the chart for this same code.
- Chimera 46, XX/46, XY true hermaphrodite
Other codes that can never be billed with Q99.0
These codes carry an Excludes1 note pointing at Q99.0. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading Q99.0 alone.
- Q56Indeterminate sex and pseudohermaphroditism
Risk adjustment
Q99.0 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.
How Q99.0 is indexed
Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to Q99.0.
- Chimera 46,XX/46,XY
- Hermaphrodite, hermaphroditism›46,XX/46,XY
- Hermaphrodite, hermaphroditism›chimera 46,XX/46,XY
Related codes at this level
Codes that share Q99. If Q99.0 is not quite right, the correct code is usually one of these.
Questions about Q99.0
- Is Q99.0 a billable ICD-10-CM code?
- Yes. Q99.0 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does Q99.0 sit in the tabular list?
- Congenital malformations, deformations and chromosomal abnormalities (Q00-QA0), in the block Chromosomal abnormalities, not elsewhere classified (Q90-Q99).