CPT® Code 90393

The CPT® Code 90393 refers to vaccinia immune globulin, human, specifically formulated for intramuscular use. This immunizing agent is a concentrated solution containing antibodies that provide effective, short-term, passive immunity to individuals exposed to the vaccinia virus. Unlike active immunization, where the recipient's immune system is stimulated to produce its own antibodies, the administration of vaccinia immune globulin offers immediate protection through the introduction of pre-formed antibodies. These antibodies circulate in the recipient's body, providing a temporary defense against the vaccinia virus, which is the live virus utilized in the smallpox vaccine. The vaccinia virus can lead to various symptoms, including rash, fever, headache, and body aches, and may result in more severe systemic complications if transmitted from an unhealed vaccination site. It is important to note that this code specifically reports the human-derived vaccinia immune globulin product used for intramuscular administration, without implying any additional procedures or services associated with its use.