Ambulatory Surgical Center (ASC) Payment System

This file contains a summary of service utilization by ASC supplier and is derived from 2021 ASC line item level data, updated through March 2022, that is, line items for services furnished on or after January 1, 2021 through December 31, 2021 that were received, processed, paid, and passed to the National Claims History file by March 31, 2022.  This file contains data for ASC services billed in 2021, including services that were added under the revised ASC payment system.  We revised CY 2021 HCPCS codes (where appropriate) to reflect their CY 2023 payment status and description using internal CY 2021 to CY 2022 and CY 2022 to CY 2023 crosswalk files.  This file includes 701,523 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. 

Media: DVD
Cost: $1,600 

Data Format: Comma separated variable block (CSV) with SAS® read-in program
Available: Proposed Rule 2023

To browse the record layout, see the Downloads section below.

Please follow the instructions on the DUA - Limited Data Sets page.