ICD-10-CM > S00-T88 > T36-T50 > T36 > T36.6 > T36.6X > T36.6X4 T36.6X4 Poisoning by rifampicins, undetermined Non-Billable/Non-Specific Codes T36.6X4A..., initial encounterT36.6X4D..., subsequent encounterT36.6X4S..., sequela