G20.C: Parkinsonism, unspecified
G20.C is a billable, specific ICD-10-CM code for parkinsonism, unspecified. It is valid for submission on a claim.
Check G20.C with the rest of the claim: free scrubberExcludes1: never code together
These conditions cannot occur together. Billing both on the same encounter is a denial.
Inclusion terms
Alternative wordings a physician may use in the chart for this same code.
- Parkinsonism, NOS
Risk adjustment
G20.C risk-adjusts. Under the CMS-HCC V28 model it maps to this category:
- HCC 199 Parkinson and Other Degenerative Disease of Basal Ganglia0.615 RAF
Coefficient shown for the Community Non-dual Aged segment. A higher HCC in the same hierarchy will suppress this one, so capturing it does not always add score. Look up the whole chart to see which of its HCCs the hierarchy would zero.
Medicare coverage
G20.C is named in 13 Medicare coverage policies: 13 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.
- A53064Billing and Coding: Outpatient Occupational Therapy
- A53065Billing and Coding: Outpatient Physical Therapy
- A56612Billing and Coding: CT of the Head
- A56874Billing and Coding: Stereotactic Radiation Therapy: Stereotactic Radiosurgery (SRS) and Stereotactic Body Radiation Therapy (SBRT)
Alphabetic index entries that lead here
- Hemiparkinsonism
- Parkinsonism(idiopathic) (primary)
- Pyramidopallidonigral syndrome
- Paralysis, paralytic›agitans
- Parkinsonism›dementia
- Syndrome›pyramidopallidonigral
- Dementia›in›paralysis agitans
- Dementia›with›Parkinsonism
- Parkinsonism›dementia›with behavioral disturbance
- Dementia›in›paralysis agitans›with behavioral disturbance
- Dementia›with›Parkinsonism›with behavioral disturbance
Code history
Unchanged in every release from FY2024 to FY2027.