Gastroenterology Coding Alert

Question: How should I code this encounter: An established patient with a plan of care in place for his Crohn's disease of the ileum presents to the office for a Remicade infusion. The gastroenterologist began the infusion at 10:00 a.m. and finished at 11:42. The patient reported nausea during the infusion, so the gastroenterologist administered 200 mg of Benadryl from 10:41 to 10:52?Vermont SubscriberAnswer: Your claim should be divided in two parts: Remicade infusion, which lasted for one hour and 42 minutes. Report the following codes:96413 -- Chemotherapy administration, intravenous infusion technique; up to 1 hour, single or initial substance/drug) for the first hour+96415 -- ... each additional hour [List separately in addition to code for primary procedure]) for the remaining 42 minutes555.0 -- Regional enteritis; small intestine) linked to 96413 and +96415 to represent the patient's conditionJ1745 -- Injection, infliximab, 10 mg) x 20 for the supply of RemicadeBenadryl infusion, which took less [...]