Verify current applicability of this policy review with Aetna. Confirm that billing staff correctly apply Aetna's coverage determinations for GBS treatments: (1) CPT 36514 and HCPCS codes J1561, J1566, J1568, J1569 (IVIG administration and immunoglobulin products) are covered only when criteria in CPB 0206 are met; (2) CPT 97810–97814 and S9473 (pulmonary rehabilitation) are covered only when criteria in CPB 0032 are met; (3) CPT 36514 (plasmapheresis) is covered only when criteria in CPB 0285 are met; (4) All HCPCS codes listed for corticosteroids (J0702, J1020, J1030, J1040, J1094, J1100, J1700, J1710, J1720, J2920, J2930, J3300–J3303, J7509, J7510, J7512, J8540), eculizumab (J1299), interferons (J9212–J9216), leukocyte trafficking inhibitors (J2323, J3380, Q5134), rituximab (J9312), acupuncture (97810–97814, S8930), and neuromuscular electrical stimulation (S8930) are NOT covered for GBS treatment as they remain experimental/investigational per this policy. Update claim rejection logic and prior authorization protocols in billing software to deny or require prior auth as appropriate, and educate providers on covered versus non-covered treatment options.