Aorta. The aorta is the largest blood vessel in the body. It is an artery that directly arises from the heart itself and descends through the thorax and into the abdomen. All the arteries of the body, save the pulmonary arteries, stem from the aorta or one of its main branches.
Ambulance Services. Ambulance Services Overview The Office of Emergency Medical Services licenses all ambulance services that are based in or regularly operate in Massachusetts, and certifies ambulance vehicles. Ambulance services may be private for-profit enterprises, private non-profit entities, municipally run or volunteer services.
1 Non-emergency transportation will only be covered if the ambulance supplier obtains a physicianâs certification indicating that ambulance transportation is necessary because other means of transportation are medically contraindicated. 2  The transportation must be provided by a Medicare-certified provider. Other Important Points: Medicare does not cover wheelchair van transportation. Medicare usually does not pay for paramedic intercepts. Medicare will not pay for transportation from the patientâs home to the patientâs physician office. In a non-emergency situation, if the ambulance provider believes that the transport may be denied coverage by Medicare, the provider must issue an Advance Beneficiary Notice (ABN) to notify the benficiary of his/her potential financial responsibility for the transport.