ICD-10-CM > S00-T88 > T51-T65 > T58 > T58.9 > T58.92 T58.92 Toxic effect of carbon monoxide from unspecified source, intentional self-harm Non-Billable/Non-Specific Codes T58.92XA..., initial encounterT58.92XD..., subsequent encounterT58.92XS..., sequela