Medicare Ambulance Benefit and Basis for Denials:
http://www.cms.hhs.gov/AmbulanceFeeSchedule/downloads/ambabn71603.pdf

Medicare Part B EDI Helpline Numbers:
http://www.cms.hhs.gov/ElectronicBillingEDITrans/Downloads/MedicarePartBEDIHelpline.pdf

National Uniform Claim Committee-1500 Claim Form info:
http://www.nucc.org

HIPAA Related Code Lists:
http://www.wpc-edi.com/codes

How to Enroll in Medicare Electronic Data Interchange:
http://www.cms.hhs.gov/ElectronicBillingEDITrans/03_EnrollInEDI.asp#TopOfPage

HIPAA General Info and Overview:
http://www.cms.hhs.gov/HIPAAGenInfo/

Medicare Regional Office Contacts for Ambulance Fee Schedule issues:
http://www.cms.hhs.gov/AmbulanceFeeSchedule/downloads/rocontacts.pdf

Everything you have ever wanted to know about NPI numbers:
http://www.cms.hhs.gov/NationalProvIdentStand/

The American Ambulance Association:
http://www.the-aaa.org/