HCPCS Code J1561: Injection, immune globulin, (gamunex-c/gammaked), non-lyophilized (e.g., liquid), 500 mg

Yes, but the billed units should reflect the total amount given. For example, if 250 mg is administered, report 0.5 units, following payer rounding rules.

J1561 is specific to the non-lyophilized (liquid) form of Gamunex-C or Gammaked in 500 mg doses. Other codes may cover lyophilized (powder) forms, different concentrations, or other brand formulations.

Often yes. Many insurers, including Medicare Advantage plans, require prior authorization for immune globulin therapy. Check the patient’s policy before treatment to avoid delays.