Ambulatory Surgical Center (ASC) Payment System

This file contains a summary of service utilization by ASC supplier and is derived from 2025 ASC line item level data, updated through March 2026, that is, line items for services furnished on or after January 1, 2025 through December 31, 2025 that were received, processed, paid, and passed to the National Claims History file by March 31, 2026.  This file contains data for ASC services billed in 2025, including services that were added under the revised ASC payment system.  We revised CY 2025 HCPCS codes (where appropriate) to reflect their CY 2027 payment status and description using internal CY 2025 to CY 2026 and CY 2026 to CY 2027 crosswalk files.  This file includes 714,427 records summarized first at the supplier level and then at the HCPCS code level. This is a flat file that is available on DVD.

The ASC LDS file will be available twice a year, once for the NPRM in late spring/early summer, and again for the final rule within a month of publication of the OPPS final rule in the Federal Register. 

For file cost and availability, please see the LDS Worksheet. (ZIP)