Welcome! If you have questions or need help, visit the member site, open your UnitedHealthcare app or call the number on the back of your member ID card..Call us at Dynamic TFN - Dynamic TFN today. Fed TFN- FED TFN Med Supp TFN - MEDSUPP TFN, No swap TFN - No Swap TFN, Static TFN - 1-800-654-8899,OLD TFN - 1-800-654-8899