CMS is now requiring two new HCPCS codes be billed when performing immunohistochemistry stains. G0461, for the first antibody stain, and G0462 for each additional stain are the two codes replacing 88342.
MPLN is now billing G-codes (G0461 and G0462) to government payers, and Medicare advantage plans such as Blue Advantage and Humana Gold. CPT code 88342 will continue to appear on test reports and will be billed to all other payers including our direct bill clients.
G0461 - per specimen; first single or multiplex antibody stain
G0462 - each additional single or multiplex antibody stain (list separately in addition to code for primary procedure)
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