All ICD10 Codes

G21.0

Billable
ChapterG00–G99
Ranksubcategory
Official Description

Malignant neuroleptic syndrome

Metadata & Insights
  • •Billable/specific code (valid for reimbursement).
  • •Chapter 6: Diseases of the Nervous System (G00-G99).

Instructional Notes

Excludes1(Not coded here. Use a different code.)
  • neuroleptic induced parkinsonism (G21.11)
Use Additional Code
General instructions are available for the parent sections:
View CH6 NotesView G21 Notes

Clinical Hierarchy

BillableHas subcodes
CH6Diseases of the nervous system (G00-G99)
G20-G26Extrapyramidal and movement disorders (G20-G26)
G21Secondary parkinsonism
G21.0Malignant neuroleptic syndromeBillable

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to G21.0:

categoryG21
Secondary parkinsonism
View context instructions
chapterCH6
Diseases of the nervous system (G00-G99)
View context instructions

MS-DRG Classification

2026 v43.1

This code is grouped within the following Diagnosis Related Group(s) for clinical reimbursement:

DRG 091
Other Disorders of Nervous System with MCC
DRG 092
Other Disorders of Nervous System with CC
DRG 093
Other Disorders of Nervous System without CC/MCC

Cross Reference

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