Q85.8 — Other phakomatoses, not elsewhere classified
Q85.8 is a non-billable header ICD-10-CM code for other phakomatoses, not elsewhere classified. It cannot be billed on its own: choose one of the more specific child codes below.
Excludes1 — never code together
These conditions cannot occur together. Billing both on the same encounter is a denial.
- Meckel-Gruber syndrome (Q61.9)
Other codes that can never be billed with Q85.8
These codes carry an Excludes1 note pointing at Q85.8. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading Q85.8 alone.
Risk adjustment
Q85.8 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.
Code to one of these instead Q85.8
4 child codes. Green means billable.
Related codes at this level
Codes that share Q85. If Q85.8 is not quite right, the correct code is usually one of these.
Questions about Q85.8
- Is Q85.8 a billable ICD-10-CM code?
- No. Q85.8 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
- Where does Q85.8 sit in the tabular list?
- Congenital malformations, deformations and chromosomal abnormalities (Q00-QA0), in the block Other congenital malformations (Q80-Q89).
- What cannot be coded together with Q85.8?
- Q85.8 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.