G21.0 - Malignant neuroleptic syndrome
- Applicable to Malignant neuroleptic syndrome
- The 2025 edition of ICD10-CM G21.0 became effective on October 1, 2024.
- This is the American ICD10-CM version of G21.0 - other international versions of ICD10 G21.0 may differ.
- G21.0 is a Billable / Specific ICD10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
Code Additional Code:
- code for adverse effect, if applicable, to identify drug (T43.3X5, T43.4X5, T43.505, T43.595)
Type 1 Excludes
- neuroleptic induced parkinsonism (G21.11)
Billable/Specific Code
The following codes above G21.0 contain annotation back-references that may be applicable to G21.0:
- Chapter: G00-G99 - Diseases of the nervous system
- Section: G20-G26 - Extrapyramidal and movement disorders
- Category: G21 - Secondary parkinsonism
Browse other similar CM codes:
Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.
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