The method and system include marking a surgery site (e.g., location of surgical incision) or a site of other medical action with a machine-readable medical marking (e.g., bar code or a dot pattern), which may be used in conjunction with (1) a scanner for reading the machine-readable medical marking and (2) a controller for controlling medical actions in response to the read machine-readable medical marking. The system and method ensure the validation of the surgical procedure, the patient awaiting the surgical procedure, and the site or location on the patient where the surgery is to be performed. Utilizing a scanning device for reading machine-readable medical markings, and a controller, there are additional means to check and double check the medical action before the actual medical action (e.g., surgery) is performed.