ICD-10-CM > S00-T88 > T36-T50 > T37 > T37.4 > T37.4X > T37.4X6 T37.4X6 Underdosing of anthelminthics Non-Billable/Non-Specific Codes T37.4X6A..., initial encounterT37.4X6D..., subsequent encounterT37.4X6S..., sequela