Ambulatory Surgical Center (ASC) Payment System
This file contains a summary of service utilization by ASC supplier and is derived from 2018 ASC line item level data, updated through March 2019, that is, line items for services furnished on or after January 1, 2018 through December 31, 2018 that were received, processed, paid, and passed to the National Claims History file by March 31, 2019. This file contains data for ASC services billed in 2018, including services that were added under the revised ASC payment system. We revised CY 2018 HCPCS codes (where appropriate) to reflect their CY 2020 payment status and description using internal CY 2018 to CY 2019, and CY 2019 to CY 2020 crosswalk files. This file includes 722,017 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 with SAS® read-in program
Available: Final Rule 2020
To browse the record layout, see the Downloads section below.