ICD-10-CM > S00-T88 > T36-T50 > T37 > T37.3 > T37.3X > T37.3X6 T37.3X6 Underdosing of other antiprotozoal drugs Non-Billable/Non-Specific Codes T37.3X6A..., initial encounterT37.3X6D..., subsequent encounterT37.3X6S..., sequela