CPT Code 87900 Test your skills with a new coding question from Clinical Coding Workout every Monday. Code 87900, infectious agent drug susceptibility phenotype prediction using regularly updated genotypic bioinformatics, is used in the management of patients with what disease? Cancer patients on toxic chemotherapy agents HIV patients on antiretroviral therapy Tuberculosis patients on rifampin therapy Organ transplant patients on immunosuppressive therapySource: AHIMA Press. Clinical Coding Workout, 2019. https://my.ahima.org/store/product?id=65592. Leave a comment