G21.1
G21.1 — Other drug-induced secondary parkinsonism
Non-billable headerICD-10-CM
G21.1 is a non-billable header ICD-10-CM code for other drug-induced secondary parkinsonism. It cannot be billed on its own: choose one of the more specific child codes below.
Other codes that can never be billed with G21.1
These codes carry an Excludes1 note pointing at G21.1. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading G21.1 alone.
- G21.0Malignant neuroleptic syndrome
Risk adjustment
G21.1 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 G21.1
2 child codes. Green means billable.
Related codes at this level
Codes that share G21. If G21.1 is not quite right, the correct code is usually one of these.
Questions about G21.1
- Is G21.1 a billable ICD-10-CM code?
- No. G21.1 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
- Where does G21.1 sit in the tabular list?
- Diseases of the nervous system (G00-G99), in the block Extrapyramidal and movement disorders (G20-G26).