CPT® Code 90636

The CPT® Code 90636 refers to the Hepatitis A and Hepatitis B vaccine (HepA-HepB) specifically formulated for adult dosage and intended for intramuscular administration. Vaccines, unlike immune globulins that offer short-term, passive immunity, are designed to provide active, long-term immunity. This is achieved by introducing altered versions of specific viruses or bacteria into the recipient's immune system, prompting it to produce its own antibodies against these pathogens. The immune system retains a memory of these antibodies, enabling a quicker and more effective response upon subsequent exposures to the same antigens. The Hepatitis A vaccine offers significant protection against severe liver diseases, which can lead to hospitalization or even death, while the Hepatitis B vaccine safeguards against serious health issues, including hepatocellular carcinoma. The vaccine can be derived from the blood plasma of asymptomatic carriers or produced through recombinant technology, where a plasmid containing the hepatitis gene is inserted into common baker's yeast. This yeast is then lysed, and the components are purified to create the vaccine. The codes associated with hepatitis vaccines for intramuscular use include specific codes for different dosages and schedules, with code 90636 designated for the adult dosage of the combined HepA-HepB vaccine.