Question: Pennsylvania Subscriber Answer: The physician might request a brain natriuretic peptide (BNP) test for a patient with chest pain to evaluate the prognosis of a current cardiovascular event. The lab that performs BNP should bill 83880 (Natriuretic peptide). The cardiologist might also order a C-reactive protein (CRP) test to evaluate inflammation that's related to heart disease risk. The lab that performs that test should report 86140 (C-reactive protein). You may see these and other tests referred to as "CVD markers" because they could be an indicator for cardiovascular disease. The term does not encompass a specific test or set of tests, however, so the cardiologist's order and documentation of review should specify the precise tests.