Outpatient Prospective Payment System (OPPS) OCE (Prior to

40.2 - Outpatient Prospective Payment System (OPPS) OCE (Prior to July 1, 2007) (Rev. 1107, Issued: 11-09-06, Effective: 07-01-07, Implementation: 07-02-07) The OPPS OCE performs the following two major functions: • Edit claims data to identify errors and return a series of edit flags; and • Assign an ambulatory payment classification (APC) number for each service covered under OPPS and return information to be used as input to the Pricer program. Effective January 5, 2003, Medicare contractors will be receiving subsequent quarterly updates to these Outpatient Code Editor Specifications through a Recurring Update Notification.