ICD-10-CM>R00-R99>R50-R69>R53R53Malaise and fatigueNon-Billable/Non-SpecificCodesR53.0Neoplastic (malignant) related fatigueR53.1WeaknessR53.2Functional quadriplegiaR53.8Other malaise and fatigueR53.81Other malaiseR53.82Chronic fatigue, unspecifiedR53.83Other fatigue