>Does anyone know of a free/share ware program that will generate random numbers for patient ids? In the folloiwng format: 999-9999-99999. We are currently generating based of the patient's first, last name and date of birth but are experiencing some numbers being generated twice....

Rather than generating random numbers, which aren't foolproof for preventing duplicates, why don't you just store the last number assigned, and increment the number for each new patient?