Question: New York Subscriber Answer: For example, your documentation could show different locations within the hospital, such as initially in the ED and later in the Intensive Care Unit (ICU). If the physician had to go to the ICU twice, separated by a reasonable amount of time, that too would indicate two distinct sessions of the same service. You will have trouble, however, justifying two different sessions, both in the ED during the same encounter, of the same service. If the sessions really are distinct, use modifier -76 on the second session. You do not have to append modifier 53 (Discontinued procedure). Many services are unsuccessful for one reason or another, and usually stopped. Ten minutes of CPR would likely involve one or two rounds of medications and therefore, qualifies as a legitimate full service.