A system for documenting and coding diagnostic and interventional procedures for hospital and physician reimbursement, and automating the process of documenting and coding so that the two steps are unified into a singular activity. The computer-based system provides a graphical user interface allowing the physician to input details pertinent to the diagnostic and interventional procedures in an interactive manner. The computer program provides active guidance that enforces specification of details required to justify medical necessity of each performed procedure. Based on the physician's procedure entry, the program generates the resulting CPT (Current Procedural Terminology) codes and their accompanying documentation, thereby eliminating the opportunity for error. The program produces reports ready for submission for reimbursement.