G0249 HCPCS - PROVISION OF TEST MATERIALS AND EQUIPMENT FOR HOME INR MONITORING OF PATIENT WITH EITHER MECHANICAL HEART VALVE(S), CHRONIC ATRIAL FIBRILLATION, OR VENOUS THROMBOEMBOLISM WHO MEETS MEDICARE COVERAGE CRITERIA; INCLUDES: PROVISION OF MATERIALS FOR USE IN THE HOME AND REPORTING OF TEST RESULTS TO PHYSICIAN; TESTING NOT OCCURRING MORE FREQUENTLY THAN ONCE A WEEK; TESTING MATERIALS, BILLING UNITS OF SERVICE INCLUDE 4 TESTS