This file contains patient specific problems entered by the various pro- viders of service. The PATIENT NAME field (.01) is a backward pointer to the IHS PATIENT file. This file contains one record for each problem for each patient, therefore, the KEY field (.01) is duplicated. As of March 17, 1986 the FACILITY must be entered prior to the NUMBER. If the NUMBER is entered without previously entering the FACILITY the "AC" index is created with no FACILITY pointer.