CPT® Code 90385

The Rho(D) immune globulin (RhIg) is a specialized immunizing agent that is administered intramuscularly to provide passive immunity. This product is formulated as a concentrated solution of antibodies, which are derived from the pooled blood of multiple donors. The primary function of RhIg is to confer short-term protection against hemolytic reactions that can occur when Rh-positive blood from a fetus or newborn interacts with Rh-negative blood from the mother. In such cases, the mother's immune system may produce antibodies against the Rh-positive red blood cells, leading to potential complications. However, the administration of Rho(D) immune globulin prevents this immune response by supplying ready-made antibodies, thus offering immediate but temporary protection without stimulating the recipient's immune system to produce its own antibodies. This passive immunity is crucial in obstetric care, particularly in preventing Rh incompatibility issues during pregnancy and after childbirth. The distinction between the various codes for Rho(D) immune globulin is important; for instance, CPT® Code 90384 represents a full dose of RhIg, while Code 90385 specifically denotes a mini-dose, and Code 90386 is used for the intravenous formulation of RhIg. These codes are strictly for reporting the product used and do not encompass any additional services or procedures associated with its administration.