ICD-10-CM > S00-T88 > T80-T88 > T88 > T88.3 T88.3 Malignant hyperthermia due to anesthesia Non-Billable/Non-Specific Use Additional code for adverse effect, if applicable, to identify drug (T41.- with fifth or sixth character 5) Codes T88.3XXA..., initial encounterT88.3XXD..., subsequent encounterT88.3XXS..., sequela