ICD-10-CM > S00-T88 > T36-T50 > T36 > T36.A > T36.AX > T36.AX4 T36.AX4 Poisoning by fluoroquinolone antibiotics, undetermined Non-Billable/Non-Specific Codes T36.AX4A..., initial encounterT36.AX4D..., subsequent encounterT36.AX4S..., sequela