Extrapyramidal and movement disorders (G20-G26)
chapter 6: Diseases of the Nervous System
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Official coding guidelines
From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.
Covers default dominant or nondominant side for hemiplegia and monoplegia, and use and sequencing of G89 pain codes, including postoperative, chronic, and neoplasm-related pain.
- Dominant/nondominant side (page 45)
- Pain - Category G89 (page 45)
All codes under G20-G26
G20-G26 can't be used on a claim. Pick a billable code below; grey headings group them.
- G20Parkinson's disease
- G20.AParkinson's disease without dyskinesia
- G20.A1Parkinson's disease without dyskinesia, without mention of fluctuations
- G20.A2Parkinson's disease without dyskinesia, with fluctuations
- G20.BParkinson's disease with dyskinesia
- G20.B1Parkinson's disease with dyskinesia, without mention of fluctuations
- G20.B2Parkinson's disease with dyskinesia, with fluctuations
- G20.CParkinsonism, unspecified
- G21Secondary parkinsonism
- G21.0Malignant neuroleptic syndrome
- G21.1Other drug-induced secondary parkinsonism
- G21.11Neuroleptic induced parkinsonism
- G21.19Other drug induced secondary parkinsonism
- G21.2Secondary parkinsonism due to other external agents
- G21.3Postencephalitic parkinsonism
- G21.4Vascular parkinsonism
- G21.8Other secondary parkinsonism
- G21.9Secondary parkinsonism, unspecified
- G23Other degenerative diseases of basal ganglia
- G23.0Hallervorden-Spatz disease
- G23.1Progressive supranuclear ophthalmoplegia [Steele-Richardson-Olszewski]
- G23.2Striatonigral degeneration
- G23.3Hypomyelination with atrophy of the basal ganglia and cerebellum
- G23.8Other specified degenerative diseases of basal ganglia
- G23.9Degenerative disease of basal ganglia, unspecified
- G24Dystonia
- G24.0Drug induced dystonia
- G24.01Drug induced subacute dyskinesia
- G24.02Drug induced acute dystonia
- G24.09Other drug induced dystonia
- G24.1Genetic torsion dystonia
- G24.2Idiopathic nonfamilial dystonia
- G24.3Spasmodic torticollis
- G24.4Idiopathic orofacial dystonia
- G24.5Blepharospasm
- G24.8Other dystonia
- G24.9Dystonia, unspecified
- G25Other extrapyramidal and movement disorders
- G25.0Essential tremor
- G25.1Drug-induced tremor
- G25.2Other specified forms of tremor
- G25.3Myoclonus
- G25.4Drug-induced chorea
- G25.5Other chorea
- G25.6Drug induced tics and other tics of organic origin
- G25.61Drug induced tics
- G25.69Other tics of organic origin
- G25.7Other and unspecified drug induced movement disorders
- G25.70Drug induced movement disorder, unspecified
- G25.71Drug induced akathisia
- G25.79Other drug induced movement disorders
- G25.8Other specified extrapyramidal and movement disorders
- G25.81Restless legs syndrome
- G25.82Stiff-man syndrome
- G25.83Benign shuddering attacks
- G25.89Other specified extrapyramidal and movement disorders
- G25.9Extrapyramidal and movement disorder, unspecified
- G26Extrapyramidal and movement disorders in diseases classified elsewhere
G20-G26 MS-DRGs
This code does not group to an MS-DRG as a principal diagnosis.
Other codes that refer to G20-G26
Notes on these codes point to G20-G26.
- R25 Excludes1: specific movement disorders (G20-G26)
About the condition
Plain-language background from MedlinePlus (National Library of Medicine), not coding guidance.
Parkinson's Disease
Parkinson'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.
Read more about parkinson's disease on MedlinePlus