G20
Non-billableParkinson's disease
G20 is the ICD-10-CM code for Parkinson's disease. It is a non-billable category code — use a more specific child code such as G20.A for billing.
- Status
- Header (non-billable)
- Chapter
- G00-G99
- Subcodes
- 3
- Edition
- FY2026
G00-G99 Diseases of the nervous system
What this means — in plain language
MedlinePlus · NIHParkinson's disease (PD) is a type of movement disorder . It happens when nerve cells in the brain don't produce enough of a brain chemical called dopamine. Sometimes it is genetic, but most cases do not seem to run in families. Exposure to chemicals in the environment might play a role. Symptoms begin gradually, often on one side of the body. Later they affect both sides. They include: Trembling of hands, arms,…
Read more about Parkinson's Disease at MedlinePlus ↗Source: U.S. National Library of Medicine (MedlinePlus). Informational only — not medical advice.
Includes
- •Hemiparkinsonism
- •Idiopathic Parkinsonism or Parkinson's disease
- •Paralysis agitans
- •Primary Parkinsonism or Parkinson's disease
Use additional code
- •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-)
Medications indicated for this condition
FDA labeling- AmantadineInfluenza A M2 Protein Inhibitor [EPC]›
- Carbidopa and LevodopaAromatic Amino Acid [EPC]›
- Diphenhydramine›
- RopiniroleNonergot Dopamine Agonist [EPC]›
- Pramipexole›
- Rasagiline›
- CarbidopaAromatic Amino Acid Decarboxylation Inhibitor [EPC]›
- Carbidopa, Levodopa and EntacaponeAromatic Amino Acid [EPC]›
- Selegiline›
- Benztropine›
- Bromocriptine›
- EntacaponeCatechol-O-Methyltransferase Inhibitor [EPC]›
Drugs whose FDA labeling lists this condition's category among its indications. Informational only — not a treatment recommendation or medical advice.
Conditions mapped to this code
MedlinePlus · NIHPlain-language health-topic references grounded in MedlinePlus (NIH/NLM).
Frequently asked questions
Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.
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