Simon Saves a Life

"Ariel". Simon, River, and Jayne infiltrate a hospital in the core worlds to do diagnostics on River. River realizes that a patient nearby is about to suffer major complications from his cardiac surgery, and Simon goes to help. After saving the patient with a debrillator, he rips the man's doctor a new asshole for nearly killing his patient by prescribing the wrong drug and causing a reaction with another drug the man was taking.

Example of:
Inconvenient Hippocratic Oath