Extrapyramidal and movement disorders
58 codes in this section
About Section G20-G26
Section G20-G26 (G20-G26) covers extrapyramidal and movement disorders. It sits within the Diseases of the nervous system chapter (G00-G99). This section contains 58 ICD-10-CM codes, 46 billable diagnoses you can submit on a claim, and 12 non-billable header codes used to organize the hierarchy.
Codes are organized below by 3-character root. Click the root to see all subcodes underneath it, or click any individual code for full coverage data, payer policies, and linked CPT procedures.
Codes in G20-G26
Grouped by 3-character root code. Click any code for full detail.
| G20.A | Parkinson's disease without dyskinesia | Header |
| G20.A1 | Parkinson's disease without dyskinesia, without mention of fluctuations | Billable |
| G20.A2 | Parkinson's disease without dyskinesia, with fluctuations | Billable |
| G20.B | Parkinson's disease with dyskinesia | Header |
| G20.B1 | Parkinson's disease with dyskinesia, without mention of fluctuations | Billable |
| G20.B2 | Parkinson's disease with dyskinesia, with fluctuations | Billable |
| G20.C | Parkinsonism, unspecified | Billable |
| G21.0 | Malignant neuroleptic syndrome | Billable |
| G21.1 | Other drug-induced secondary parkinsonism | Header |
| G21.11 | Neuroleptic induced parkinsonism | Billable |
| G21.19 | Other drug induced secondary parkinsonism | Billable |
| G21.2 | Secondary parkinsonism due to other external agents | Billable |
| G21.3 | Postencephalitic parkinsonism | Billable |
| G21.4 | Vascular parkinsonism | Billable |
| G21.8 | Other secondary parkinsonism | Billable |
| G21.9 | Secondary parkinsonism, unspecified | Billable |
| G23.0 | Hallervorden-Spatz disease | Billable |
| G23.1 | Progressive supranuclear ophthalmoplegia [Steele-Richardson-Olszewski] | Billable |
| G23.2 | Striatonigral degeneration | Billable |
| G23.3 | Hypomyelination with atrophy of the basal ganglia and cerebellum | Billable |
| G23.8 | Other specified degenerative diseases of basal ganglia | Billable |
| G23.9 | Degenerative disease of basal ganglia, unspecified | Billable |
| G24.0 | Drug induced dystonia | Header |
| G24.01 | Drug induced subacute dyskinesia | Billable |
| G24.02 | Drug induced acute dystonia | Billable |
| G24.09 | Other drug induced dystonia | Billable |
| G24.1 | Genetic torsion dystonia | Billable |
| G24.2 | Idiopathic nonfamilial dystonia | Billable |
| G24.3 | Spasmodic torticollis | Billable |
| G24.4 | Idiopathic orofacial dystonia | Billable |
| G24.5 | Blepharospasm | Billable |
| G24.8 | Other dystonia | Billable |
| G24.9 | Dystonia, unspecified | Billable |
| G25.0 | Essential tremor | Billable |
| G25.1 | Drug-induced tremor | Billable |
| G25.2 | Other specified forms of tremor | Billable |
| G25.3 | Myoclonus | Billable |
| G25.4 | Drug-induced chorea | Billable |
| G25.5 | Other chorea | Billable |
| G25.6 | Drug induced tics and other tics of organic origin | Header |
| G25.61 | Drug induced tics | Billable |
| G25.69 | Other tics of organic origin | Billable |
| G25.7 | Other and unspecified drug induced movement disorders | Header |
| G25.70 | Drug induced movement disorder, unspecified | Billable |
| G25.71 | Drug induced akathisia | Billable |
| G25.79 | Other drug induced movement disorders | Billable |
| G25.8 | Other specified extrapyramidal and movement disorders | Header |
| G25.81 | Restless legs syndrome | Billable |
| G25.82 | Stiff-man syndrome | Billable |
| G25.83 | Benign shuddering attacks | Billable |
| G25.89 | Other specified extrapyramidal and movement disorders | Billable |
| G25.9 | Extrapyramidal and movement disorder, unspecified | Billable |
Did this page help?
Quick signal so we know what to improve.
If you want a code reference page that doesn't exist yet, email coding@payerready.com.
Tell us what's missing or wrong: coding@payerready.com. We respond within 5 business days.
Reviewed by the PayerReady Medical Coding Team
Verified against the CMS 2026 code set on May 31, 2026.
Powered by 11K CPT · 98K ICD-10 · 860K MPFS rates · 4.5M NCCI edits · 9.5M NPIs. Our data methodology · About our coding team