ICD-10-CM > S00-T88 > T36-T50 > T41 > T41.3 > T41.3X > T41.3X6 T41.3X6 Underdosing of local anesthetics Non-Billable/Non-Specific Codes T41.3X6A..., initial encounterT41.3X6D..., subsequent encounterT41.3X6S..., sequela