Payment systems
MPFS — Medicare Physician Fee Schedule
MPFS is the most common payment system. Payment is calculated using Relative Value Units (RVUs) adjusted by Geographic Practice Cost Indices (GPCIs) and multiplied by the annual conversion factor.
OPPS — Outpatient Prospective Payment System
OPPS groups outpatient services into APCs with set payment rates. Separate payment for drugs, devices, and pass-through items.
IPPS — Inpatient Prospective Payment System
IPPS pays a fixed amount per inpatient discharge based on the DRG, adjusted for hospital characteristics (teaching, DSH, outliers).