Comparison of Final 2025 OPPS Addendum A with October 2024 Addendum A

This spreadsheet compares relative weights and payment rates at the APC level, using the most recent 2025 and 2024 Addendum A spreadsheets, as downloaded from the CMS website. The 2025 files are from the 2025 contractor file, dated 1-02-2025 (these are rates for January 1, 2025, through December 31, 2025). The 2024 rates are from the October Addendum contractor files – dated October 2, 2024.

The Addendum A spreadsheet contains the following 5 tabs:

1. 2025 Add. A by APC: compares 2024 and 2025 status indicators, relative weights, and payment rates for all APCs in APC order
2. 2025 Add. A sorted: same as previous tab but sorted by percent change in payment rate, from largest percentage loss to biggest percentage gain
3. 2025 New APCs: displays the new APCs
4. 2025 Deleted APCs: displays the APCs deleted from 2025
5. 2025 Status Indicators: as supplied by CMS, ADDENDUM D1.–OPPS PAYMENT STATUS INDICATORS FOR CY 2025