ICD-10-CM > S00-T88 > T36-T50 > T44 > T44.3 > T44.3X > T44.3X6 T44.3X6 Underdosing of other parasympatholytics [anticholinergics and antimuscarinics] and spasmolytics Non-Billable/Non-Specific Codes T44.3X6A..., initial encounterT44.3X6D..., subsequent encounterT44.3X6S..., sequela