G21.0
BillableMalignant neuroleptic syndrome
Malignant neuroleptic syndrome
Coding Notes
Excludes 1
Codes that cannot be used together with this code (mutual exclusion)
Excludes 2
Conditions not included here, but the patient may have both
- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
- endocrine, nutritional and metabolic diseases (E00-E88)
- injury, poisoning and certain other consequences of external causes (S00-T88)
- neoplasms (C00-D49)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
Also Known As / Clinical Terms
SNOMED CT
UMLS
- Malignant neuroleptic syndromeC0027849
- NMS (Neuroleptic Malignant Syndrome)C0027849
- NMS - Neuroleptic malignant syndromeC0027849
- NMSs (Neuroleptic Malignant Syndrome)C0027849
- Neuroleptic Malignant SyndromeC0027849
- Neuroleptic Malignant SyndromesC0027849
- Neuroleptic malignantC0027849
- Neuroleptic malignant syndromeC0027849
- Neuroleptic malignant syndrome (disorder)C0027849
- Syndrome, Neuroleptic MalignantC0027849
- Syndromes, Neuroleptic MalignantC0027849
- malignant neurolepticC0027849
- malignant neuroleptic syndromeC0027849
- neuroleptic malignantC0027849
- neuroleptic malignant syndromeC0027849
- nmsC0027849
Frequently Asked Questions
What is ICD-10 code G21.0?
ICD-10-CM code G21.0 represents "Malignant neuroleptic syndrome". It is a billable/specific code that can be used on a claim.
Is G21.0 a billable code?
Yes, G21.0 is a billable/specific ICD-10-CM code and can be used to indicate a diagnosis on a medical claim.
What chapter is G21.0 in?
G21.0 is in Chapter 6: Diseases of the Nervous System (codes G00-G99).
What codes cannot be used with G21.0?
G21.0 has Excludes1 notes indicating codes that cannot be used together with it, including: Huntington's disease (G10); neurocognitive disorder with Lewy bodies (G31.83); Shy-Drager syndrome (G90.3); and 2 more.
Are additional codes required with G21.0?
Yes, when using G21.0 you should also code: code for adverse effect, if applicable, to identify drug (T43.3X5, T43.4X5, T43.505, T43.595).
What SNOMED CT codes does G21.0 map to?
G21.0 maps to 1 SNOMED CT concept: 15244003. SNOMED CT is a clinical terminology used in electronic health records.
What are the UMLS CUIs for G21.0?
G21.0 is linked to 1 UMLS Concept Unique Identifier: C0027849. The UMLS (Unified Medical Language System) integrates multiple biomedical vocabularies maintained by the U.S. National Library of Medicine.
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Includes SNOMED Clinical Terms® (SNOMED CT®) used by permission of SNOMED International. Includes content from the UMLS Metathesaurus, courtesy of the U.S. National Library of Medicine.