Posted By AHIMA Staff on May 27, 2019 Test your skills with a new coding question from Clinical Coding Workout every Monday. A patient is admitted as an inpatient to receive radiation and chemotherapy for distal esophageal carcinoma. What is the appropriate principal diagnosis? Z51.0 Z51.11 C15.5 Either a or bSource: AHIMA Press. Clinical Coding Workout, 2019. https://my.ahima.org/store/product?id=65592.