Ambulatory Surgical Center (ASC) Payment System
This file contains a summary of service utilization by ASC supplier and is derived from 2019 ASC line item level data, updated through March 2020, that is, line items for services furnished on or after January 1, 2019 through December 31, 2019 that were received, processed, paid, and passed to the National Claims History file by March 31, 2020. This file contains data for ASC services billed in 2019, including services that were added under the revised ASC payment system. We revised CY 2019 HCPCS codes (where appropriate) to reflect their CY 2021 payment status and description using internal CY 2019 to CY 2020, and CY 2020 to CY 2021 crosswalk files. This file includes 737,884 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.
Data Format: Comma separated variable block (CSV) with SAS® read-in program
Available: Final Rule 2021
To browse the record layout, see the Downloads section below.