ICD-10-CM > S00-T88 > T51-T65 > T57 > T57.1 > T57.1X > T57.1X4 T57.1X4 Toxic effect of phosphorus and its compounds, undetermined Non-Billable/Non-Specific Codes T57.1X4A..., initial encounterT57.1X4D..., subsequent encounterT57.1X4S..., sequela