G99
G99 — Other disorders of nervous system in diseases classified elsewhere
Non-billable headerICD-10-CM
G99 is a non-billable header ICD-10-CM code for other disorders of nervous system in diseases classified elsewhere. It cannot be billed on its own: choose one of the more specific child codes below.
Risk adjustment
G99 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 G99
3 child codes. Green means billable.
Questions about G99
- Is G99 a billable ICD-10-CM code?
- No. G99 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
- Where does G99 sit in the tabular list?
- Diseases of the nervous system (G00-G99), in the block Other disorders of the nervous system (G89-G99).