How long does the referral code last? Updated December 16, 2020 19:44 The referral code expires 90 days if not entered by a patient. If the 90 days lapses, you can generate a new referral code for your patient. To generate a new code please see : How do I generate a referral code and connect a patient Related articles What is the Warranty and Replacement Policy for the Kardia 12L? Do I give every patient the same referral code How do I generate a referral code and connect a patient?