ICD-10-CM > S00-T88 > T36-T50 > T44 > T44.8 > T44.8X > T44.8X6 T44.8X6 Underdosing of centrally-acting and adrenergic-neuron-blocking agents Non-Billable/Non-Specific Codes T44.8X6A..., initial encounterT44.8X6D..., subsequent encounterT44.8X6S..., sequela