ICD-10-CM > S00-T88 > T36-T50 > T46 > T46.9 > T46.99 > T46.996 T46.996 Underdosing of other agents primarily affecting the cardiovascular system Non-Billable/Non-Specific Codes T46.996A..., initial encounterT46.996D..., subsequent encounterT46.996S..., sequela