Ambulance Billing & Coding Resources1. Ambulance Fact Sheet from CGS Medicare with CMS Reference Links 2. CMS IOM 104 Chapter 15 – Medicare Claims Processing Manual for Ambulance Services 3. Novitas Solutions Ambulance Billing Guide for Providers in AR, CO, LA, MS, NM, OK, TX, Indian Health & Veteran Affairs 4. Novitas Solutions Ambulance Modifiers for Providers in AR, CO, LA, MS, NM, OK, TX, Indian Health & Veteran Affairs 5. TMHP Services Handbook – Jan 2021 Use this as a guide for coding; some excellent coding and billing info in here.