ICD-10-CM 2027
ICD-10 code for toxic myelitis
From the official ICD-10-CM alphabetic index entry “Myelitis (acute) (ascending) (childhood) (chronic) (descending) (diffuse) (disseminated) (idiopathic) (pressure) (progressive) (spinal cord) (subacute) › toxic”. Page updated September 29, 2026.
About coding toxic myelitis
The ICD-10-CM code for toxic myelitis is G92.9 (Unspecified toxic encephalopathy).
Within G92, choose G92.9 (Unspecified toxic encephalopathy) only when documentation doesn't support a more specific option: immune effector cell-associated neurotoxicity syndrome (G92.0) and other toxic encephalopathy (G92.8).
Code first: poisoning due to drug or toxin, if applicable, (T36-T65 with fifth or sixth character 1-4).
Use an additional code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5).
Common questions about toxic myelitis ICD-10 codes
What is the ICD-10 code for toxic myelitis?
- G92.9 — Unspecified toxic encephalopathy.
Is G92.9 billable?
- Yes. G92.9 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can G92.9 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict G92.9 as a principal diagnosis.
Is G92.9 a CC or MCC?
- G92.9 is an MCC (major complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.