AAHKS Comment Letter to CMS regarding the CY2021 Hospital Outpatient Prospective Payment System (OPPS) and Ambulatory Surgical Center (ASC) Payment Systems Proposed Rule Oct 5, 2020 AAHKS Comment Letter to CMS regarding the CY2021 Hospital Outpatient Prospective Payment System (OPPS) and Ambulatory Surgical Center (ASC) Payment Systems Proposed Rule Submit a Comment Cancel replyYour email address will not be published. Required fields are marked *Comment * Name * Email * Website Please enter an answer in digits:six + 2 = Δ