ICD-10-CM > S00-T88 > T36-T50 > T42 > T42.1 > T42.1X > T42.1X6 T42.1X6 Underdosing of iminostilbenes Non-Billable/Non-Specific Codes T42.1X6A..., initial encounterT42.1X6D..., subsequent encounterT42.1X6S..., sequela