Carter receives post-op Fentanyl. However, he was addicted to this drug in earlier seasons so the chance of it working correctly would have been greatly reduced by his tolerance. The doctor would have likely used morphine instead.
When Carol Hathaway asks the organ couriers where they are from, the courier from Oregon Health and Science University (OHSU) identifies himself as being from "OSHU".
Julianna Margulies mispronounces the name of the city "Spokane." She says "SPO-kayne" rather than "spo-KANNE." Anybody living for so many years in the state of Washington (or Oregon or Idaho) would know the correct pronunciation.
Doug Ross did not do his residency at County. He did his emergency pediatrics fellowship there. He did his residency at South Side.