Ambulatory Payment Classifications
Ambulatory Payment Classifications (APCs). Payment of services under the TRICARE OPPS is based on grouping outpatient procedures and services into ambulatory payment classification groups based on clinical and resource homogeneity, provider concentration, frequency of service and minimal opportunities for upcoding and code fragmentation. Nationally established rates for each APC are calculated by multiplying the APC's relative weight derived from median costs for procedures assigned to the APC group, scaled to the median cost of the APC group representing the most frequently provided services, by the conversion factor.
32 CFR § 199.2
General. In an effort to be as specific as possible as to the word and intent of CHAMPUS, the following definitions have been developed. While many of the definitions are general and some assign meaning to relatively common terms within the health insurance environment, others are applicable only to CHAMPUS; however, they all appear in this part solely for the purpose of the Program. Except when otherwise specified, the definitions in this section apply generally throughout this part.