G21.0
BillableMalignant neuroleptic syndrome
G21.0 is the ICD-10-CM code for Malignant neuroleptic syndrome. It is a billable, specific code valid for reimbursement.
G00-G99 Diseases of the nervous system
What this means — in plain language
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Read more about Drug Reactions at MedlinePlus ↗Source: U.S. National Library of Medicine (MedlinePlus). Informational only — not medical advice.
Excludes1 — not coded here
- •neuroleptic induced parkinsonism (G21.11)
Use additional code
Medications indicated for this condition
FDA labeling- AmantadineInfluenza A M2 Protein Inhibitor [EPC]›
- Carbidopa and LevodopaAromatic Amino Acid [EPC]›
- CarbidopaAromatic Amino Acid Decarboxylation Inhibitor [EPC]›
Drugs whose FDA labeling lists this condition's category among its indications. Informational only — not a treatment recommendation or medical advice.
Frequently asked questions
- What is ICD-10 code G21.0?
- G21.0 is the ICD-10-CM code for "Malignant neuroleptic syndrome". It falls under G00-G99 Diseases of the nervous system.
- Is G21.0 a billable code?
- Yes — G21.0 is a billable, specific ICD-10-CM code valid for reimbursement.
- What is excluded from G21.0?
- Excludes1 (not coded here): neuroleptic induced parkinsonism (G21.11).
Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.
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