1. Medicare's hospital outpatient prospective payment system: OPPS 101 (part 1 of 2);Guidi;J Oncol Pract,2011
2. Electronic code of Federal Regulations (e-CFR), Chapter IV Centers for Medicare & Medicaid Services: Part 416 Ambulatory Surgical Services. Available at: https://www.law.cornell.edu/cfr/text/42/part-416 Accessed April 26, 2020.
3. Centers for Medicare & Medicaid Services: Ambulatory Surgical Center Payment - Correction Notice. CMS 1717-F, Addenda AA & EE. 2020.
4. Centers for Medicare & Medicaid Services: Final changes to the ASC payment system and CY 2008 Payment rate. CMS 1392-FC. 2008.