ICD-10-CM > S00-T88 > T36-T50 > T50 > T50.4 > T50.4X > T50.4X6 T50.4X6 Underdosing of drugs affecting uric acid metabolism Non-Billable/Non-Specific Codes T50.4X6A..., initial encounterT50.4X6D..., subsequent encounterT50.4X6S..., sequela