Q96.3 — Mosaicism, 45, X/46, XX or XY
Q96.3 is a billable, specific ICD-10-CM code for mosaicism, 45, x/46, xx or xy. It is valid for submission on a claim.
Risk adjustment
Q96.3 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.
Medicare coverage
Q96.3 is named in 8 Medicare coverage policies — 8 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A56781Billing and Coding: Transthoracic Echocardiography (TTE)
- A56781Billing and Coding: Transthoracic Echocardiography (TTE)
- A57132Billing and Coding: Bone Mass Measurement
- A57132Billing and Coding: Bone Mass Measurement
How Q96.3 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 Q96.3.
- Mosaicism, mosaic›45,X/46,XX
- Mosaicism, mosaic›XY
Related codes at this level
Codes that share Q96. If Q96.3 is not quite right, the correct code is usually one of these.
Questions about Q96.3
- Is Q96.3 a billable ICD-10-CM code?
- Yes. Q96.3 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does Q96.3 sit in the tabular list?
- Congenital malformations, deformations and chromosomal abnormalities (Q00-QA0), in the block Chromosomal abnormalities, not elsewhere classified (Q90-Q99).