ICD-10-CM > S00-T88 > T51-T65 > T56 > T56.4 > T56.4X > T56.4X4 T56.4X4 Toxic effect of copper and its compounds, undetermined Non-Billable/Non-Specific Codes T56.4X4A..., initial encounterT56.4X4D..., subsequent encounterT56.4X4S..., sequela