ICD-10-CM > S00-T88 > T36-T50 > T43 > T43.6 > T43.69 > T43.696 T43.696 Underdosing of other psychostimulants Non-Billable/Non-Specific Codes T43.696A..., initial encounterT43.696D..., subsequent encounterT43.696S..., sequela