ICD-10-CM > S00-T88 > T36-T50 > T45 > T45.5 > T45.52 > T45.526 T45.526 Underdosing of antithrombotic drugs Non-Billable/Non-Specific Codes T45.526A..., initial encounterT45.526D..., subsequent encounterT45.526S..., sequela