ICD-10-CM > S00-T88 > T36-T50 > T45 > T45.8 > T45.8X > T45.8X6 T45.8X6 Underdosing of other primarily systemic and hematological agents Non-Billable/Non-Specific Codes T45.8X6A..., initial encounterT45.8X6D..., subsequent encounterT45.8X6S..., sequela