A radio frequency identification (RFID) system for use with active implantable medical devices (AIMD) implanted in a patient comprises an interrogator and an RFID tag comprising a substrate, an RFID chip, and an antenna. The RFID is typically enclosed in a biocompatible and hermetically sealed container comprising a ceramic housing, an end cap and an encapsulant. The RFID tag or sealed container may be affixed to an AIMD or surgically implanted in a patient adjacent to an AIMD. Alternatively, the sealed container may be injected into body tissue by a large needle syringe. The RFID tag may store information about an AIMD including manufacturer, model number and serial number. The RFID tag may also store information about a treating physician and/or patient including the treating physician's name and contact information, the patient's name, contact information, medical condition, treatment and other relevant information.