Chromogranin A (CgA)
CgA may be considered medically necessary only in the evaluation of suspected or known neuroendocrine tumors, including carcinoid, neuroblastoma and in the assessment of disease progression and treatment efficacy for these conditions. When reported for conditions other than neuroendocrine tumors, CgA is considered experimental/investigational, and therefore, non-covered.
CgA not meeting the criteria as indicated in this policy is considered not medically necessary.
Immunoassay for tumor antigen; other antigen, quantitative, (e.g., CA 50, 72-4, 549) represents immunoassays for tumor antigens other than CgA that are not designated with a specific procedure code.
Immunoassay for tumor antigen; other antigen, quantitative, (e.g., CA 50, 72-4, 549) represents immunoassays for tumor antigens other than CgA not meeting the criteria as indicated in this policy is considered not medically necessary.
Procedure Code
