ICD-10-CM > S00-T88 > T51-T65 > T58 > T58.9 > T58.93 T58.93 Toxic effect of carbon monoxide from unspecified source, assault Non-Billable/Non-Specific Codes T58.93XA..., initial encounterT58.93XD..., subsequent encounterT58.93XS..., sequela