Is Q85 a billable ICD-10-CM code?

No. Q85 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does Q85 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?

Q85 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.

Q85

Q85 — Phakomatoses, not elsewhere classified

Non-billable headerICD-10-CM

Q85 is a non-billable header ICD-10-CM code for 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.

ataxia telangiectasia [Louis-Bar] (G11.3)
familial dysautonomia [Riley-Day] (G90.1)

Other codes that can never be billed with Q85

These codes carry an Excludes1 note pointing at Q85. 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 alone.

L81Other disorders of pigmentation
Q82Other congenital malformations of skin
D33Benign neoplasm of brain and other parts of central nervous system
D36.1Benign neoplasm of peripheral nerves and autonomic nervous system
D48Neoplasm of uncertain behavior of other and unspecified sites

Risk adjustment

Q85 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

4 child codes. Green means billable.

Questions about Q85

Is Q85 a billable ICD-10-CM code?: No. Q85 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does Q85 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?: Q85 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.