Q78.6 — Multiple congenital exostoses
Q78.6 is a billable, specific ICD-10-CM code for multiple congenital exostoses. It is valid for submission on a claim.
Inclusion terms
Alternative wordings a physician may use in the chart for this same code.
- Diaphyseal aclasis
Risk adjustment
Q78.6 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
Q78.6 is named in 3 Medicare coverage policies — 3 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A56907Billing and Coding: Bisphosphonate Drug Therapy
- A57204Billing and Coding: MRI and CT Scans of the Head and Neck
- A59561Billing and Coding: Bisphosphonate Drug Therapy
How Q78.6 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 Q78.6.
- Aclasis, diaphyseal
- Diaphysial aclasis
- Exostosis›congenital(multiple)
- Exostosis›multiple, congenital
Related codes at this level
Codes that share Q78. If Q78.6 is not quite right, the correct code is usually one of these.
Questions about Q78.6
- Is Q78.6 a billable ICD-10-CM code?
- Yes. Q78.6 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does Q78.6 sit in the tabular list?
- Congenital malformations, deformations and chromosomal abnormalities (Q00-QA0), in the block Congenital malformations and deformations of the musculoskeletal system (Q65-Q79).