ICD-10-CM > S00-T88 > T36-T50 > T36 > T36.2 > T36.2X > T36.2X6 T36.2X6 Underdosing of chloramphenicol group Non-Billable/Non-Specific Codes T36.2X6A..., initial encounterT36.2X6D..., subsequent encounterT36.2X6S..., sequela