ICD-10-CM > S00-T88 > T36-T50 > T39 > T39.2 > T39.2X > T39.2X4 T39.2X4 Poisoning by pyrazolone derivatives, undetermined Non-Billable/Non-Specific Codes T39.2X4A..., initial encounterT39.2X4D..., subsequent encounterT39.2X4S..., sequela