Is G36 a billable ICD-10-CM code?

No. G36 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does G36 sit in the tabular list?

Diseases of the nervous system (G00-G99), in the block Demyelinating diseases of the central nervous system (G35-G37).

What cannot be coded together with G36?

G36 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.

G36

G36 — Other acute disseminated demyelination

Non-billable headerICD-10-CM

G36 is a non-billable header ICD-10-CM code for other acute disseminated demyelination. 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.

postinfectious encephalitis and encephalomyelitis NOS (G04.01)

Other codes that can never be billed with G36

These codes carry an Excludes1 note pointing at G36. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading G36 alone.

G37.3Acute transverse myelitis in demyelinating disease of central nervous system

Risk adjustment

G36 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 G36

4 child codes. Green means billable.

Questions about G36

Is G36 a billable ICD-10-CM code?: No. G36 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does G36 sit in the tabular list?: Diseases of the nervous system (G00-G99), in the block Demyelinating diseases of the central nervous system (G35-G37).
What cannot be coded together with G36?: G36 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.