Is A80 a billable ICD-10-CM code?

No. A80 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does A80 sit in the tabular list?

Certain infectious and parasitic diseases (A00-B99), in the block Viral and prion infections of the central nervous system (A80-A89).

What cannot be coded together with A80?

A80 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.

A80

A80 — Acute poliomyelitis

Non-billable headerICD-10-CM

A80 is a non-billable header ICD-10-CM code for acute poliomyelitis. 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.

acute flaccid myelitis (G04.82)

Other codes that can never be billed with A80

These codes carry an Excludes1 note pointing at A80. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading A80 alone.

A85Other viral encephalitis, not elsewhere classified
A87Viral meningitis

Risk adjustment

A80 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 A80

6 child codes. Green means billable.

Questions about A80

Is A80 a billable ICD-10-CM code?: No. A80 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does A80 sit in the tabular list?: Certain infectious and parasitic diseases (A00-B99), in the block Viral and prion infections of the central nervous system (A80-A89).
What cannot be coded together with A80?: A80 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.