Blood gas study/oxygen saturation test must be performed by a. physician or qualified provider or supplier of laboratory services. that is registered and able to bill for the test. Test performed in. a qualified providerâs office must be reviewed and signed by. patientâs physician or qualified provider. Medicare requires that test results be documented in patientâs. medical record and made available to the oxygen provider. If test. is not taken under these conditions, additional documentation. must be obtained from physician.
President James Monroeâs 1823 annual message to Congress contained the Monroe Doctrine, which warned European powers not to interfere in the affairs of the Western Hemisphere. Understandably, the United States has always taken a particular interest in its closest neighbors â the nations of the Western Hemisphere.
While the Monroe Doctrine had sought to prevent European intervention, the Roosevelt Corollary was used to justify US intervention throughout the hemisphere. In 1934, President Franklin D. Roosevelt renounced interventionism and established his Good Neighbor policy for the Western Hemisphere.