ICD-10-CM > S00-T88 > T51-T65 > T56 > T56.8 > T56.81 T56.81 Toxic effect of thallium Non-Billable/Non-Specific Codes T56.811Toxic effect of thallium, accidental (unintentional)T56.811A..., initial encounterT56.811D..., subsequent encounterT56.811S..., sequelaT56.812Toxic effect of thallium, intentional self-harmT56.812A..., initial encounterT56.812D..., subsequent encounterT56.812S..., sequelaT56.813Toxic effect of thallium, assaultT56.813A..., initial encounterT56.813D..., subsequent encounterT56.813S..., sequelaT56.814Toxic effect of thallium, undeterminedT56.814A..., initial encounterT56.814D..., subsequent encounterT56.814S..., sequela