Section 2: Advanced Medical Billing Study this Section Section Content Lessons Status 1 2.1 Coordination of Benefits 2 2.2 Working with Modifiers 3 2.3 "Routine" Diagnostic Testing 4 2.4 Medical Diagnostic Testing Overview 5 2.5 Medical Diagnostic Tests Breakdown 6 2.6 Working with Surgical Codes 7 2.7 Surgical Codes Breakdown 8 2.8 Cataract Post-Op Billing