ICD-10-CM > S00-T88 > T51-T65 > T56 > T56.8 > T56.81 > T56.812 T56.812 Toxic effect of thallium, intentional self-harm Non-Billable/Non-Specific Codes T56.812A..., initial encounterT56.812D..., subsequent encounterT56.812S..., sequela