Abstract: Granting secure access to stored digital medical information to patients or healthcare providers facilitates information exchange in healthcare. Payment for healthcare services can be accomplished with a credit card or other electronic payment means. Each payment transaction is assigned a unique ID number by financial services computer systems, itself being transmitted with temporal information to the medical record system at the time of issuance. Receiving medical record system(s) incorporate the ID number into the validation process by requiring it during validation in defined time frame from issuance. When correctly entered in the time frame allocated, patient medical information is displayed on the requestor's computer screen. If the ID is not entered in the determined time frame, access if not granted. Transaction ID number usage therefore provides a temporal limit on access to the patient's medical information and serves as an additional validation mechanism.