Critical Care is the service rendered by a physician for providing, in an Intensive Care Area, all aspects of care of a critically ill patient excluding ventilatory support and includes initial consultation and assessment, emergency resuscitation, intravenous lines, cutdowns, intraosseous infusion, pressure infusion sets and pharmacological agents, insertion of arterial, C.V.P. or urinary catheters and nasogastric intubation with or without anaesthesia, securing and interpretation of laboratory tests, oximetry, transcutaneous blood gases, and intracranial pressure monitoring interpretation and assessment when indicated (excluding insertion of I.C.P. measuring device). Except when a patient is on a ventilator, these fees are not payable for services rendered to stabilized patients in I.C.U.s, or patients admitted for ECG monitoring or observation alone. If the patient has been transferred from comprehensive care to critical care, the day of the transfer shall be deemed for payment purposes to be the second day of critical care.