ICD-10-CM > S00-T88 > T51-T65 > T58 > T58.8 > T58.8X > T58.8X2 T58.8X2 Toxic effect of carbon monoxide from other source, intentional self-harm Non-Billable/Non-Specific Codes T58.8X2A..., initial encounterT58.8X2D..., subsequent encounterT58.8X2S..., sequela