G20
G20 — Parkinson's disease
Non-billable headerICD-10-CM
G20 is a non-billable header ICD-10-CM code for parkinson's disease. It cannot be billed on its own: choose one of the more specific child codes below.
Use additional code
Add a secondary code to capture the detail described below.
- code, if applicable, to identify:
- dementia with anxiety (F02.84, F02.A4, F02.B4, F02.C4)
- dementia with behavioral disturbance (F02.81-, F02.A1-, F02.B1-, F02.C1-)
- dementia with mood disturbance (F02.83, F02.A3, F02.B3, F02.C3)
- dementia with psychotic disturbance (F02.82, F02.A2, F02.B2, F02.C2)
- dementia without behavioral disturbance (F02.80, F02.A0, F02.B0, F02.C0)
- mild neurocognitive disorder due to known physiological condition (F06.7-)
Inclusion terms
Alternative wordings a physician may use in the chart for this same code.
- Hemiparkinsonism
- Idiopathic Parkinsonism or Parkinson's disease
- Paralysis agitans
- Primary Parkinsonism or Parkinson's disease
Other codes that can never be billed with G20
These codes carry an Excludes1 note pointing at G20. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading G20 alone.
Risk adjustment
G20 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 G20
3 child codes. Green means billable.
Questions about G20
- Is G20 a billable ICD-10-CM code?
- No. G20 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
- Where does G20 sit in the tabular list?
- Diseases of the nervous system (G00-G99), in the block Extrapyramidal and movement disorders (G20-G26).