Is G04.8 a billable ICD-10-CM code?

No. G04.8 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does G04.8 sit in the tabular list?

Diseases of the nervous system (G00-G99), in the block Inflammatory diseases of the central nervous system (G00-G09).

G04.8

G04.8 — Other encephalitis, myelitis and encephalomyelitis

Non-billable headerICD-10-CM

G04.8 is a non-billable header ICD-10-CM code for other encephalitis, myelitis and encephalomyelitis. It cannot be billed on its own: choose one of the more specific child codes below.

Code also

Both codes may be needed to describe the encounter fully. Sequencing depends on the reason for the visit.

any associated seizure (G40.-, R56.9)

Other codes that can never be billed with G04.8

These codes carry an Excludes1 note pointing at G04.8. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading G04.8 alone.

A80Acute poliomyelitis
G04.0Acute disseminated encephalitis and encephalomyelitis (ADEM)
G37.3Acute transverse myelitis in demyelinating disease of central nervous system

Risk adjustment

G04.8 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 G04.8

3 child codes. Green means billable.

Related codes at this level

Codes that share G04. If G04.8 is not quite right, the correct code is usually one of these.

Questions about G04.8

Is G04.8 a billable ICD-10-CM code?: No. G04.8 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does G04.8 sit in the tabular list?: Diseases of the nervous system (G00-G99), in the block Inflammatory diseases of the central nervous system (G00-G09).