CPT® Code 90685

1. Indications

The quadrivalent influenza virus vaccine (IIV4) is indicated for the prevention of influenza caused by the four specific strains of the virus included in the vaccine formulation. The vaccine is recommended for individuals who are at risk of contracting influenza, particularly during the influenza season. The following conditions and populations may warrant vaccination:

• High-Risk Populations Individuals with chronic health conditions, such as asthma, diabetes, or heart disease, who are more susceptible to severe influenza complications.
• Healthcare Workers Those who work in healthcare settings and are at increased risk of exposure to influenza viruses.
• Pregnant Women Pregnant individuals, as they are at higher risk for severe illness from influenza.
• Children and Elderly Young children and older adults, who are more vulnerable to influenza-related complications.

2. Procedure

The administration of the quadrivalent influenza virus vaccine involves several key procedural steps to ensure proper delivery and effectiveness of the vaccine:

• Step 1: Preparation Prior to administration, the vaccine should be thoroughly inspected for any particulate matter or discoloration. The vaccine vial should be shaken gently to ensure proper mixing of the contents.
• Step 2: Site Selection The healthcare provider should select an appropriate site for intramuscular injection, typically the deltoid muscle of the upper arm for adults and older children, or the anterolateral thigh for infants and young children.
• Step 3: Injection Technique The provider should clean the injection site with an alcohol swab and allow it to dry. Using a sterile syringe and needle, the provider will insert the needle at a 90-degree angle to the skin and inject the 0.25 mL dosage of the vaccine into the muscle. The needle should be withdrawn quickly and a cotton ball or gauze should be applied to the site to minimize bleeding.
• Step 4: Post-Administration Care After the injection, the patient should be monitored for a short period to observe for any immediate adverse reactions. The provider should provide the patient with information regarding potential side effects and the importance of reporting any unusual symptoms.

3. Post-Procedure

Following the administration of the quadrivalent influenza virus vaccine, patients are typically advised to remain in the healthcare setting for a brief observation period to monitor for any immediate allergic reactions or side effects. Common post-vaccination reactions may include soreness at the injection site, mild fever, or fatigue, which usually resolve within a few days. Patients should be informed about the importance of reporting any severe or unusual reactions to their healthcare provider. Additionally, it is essential to remind patients that the vaccine does not provide immediate immunity and that it may take up to two weeks for the body to develop protective antibodies against the influenza virus. Regular follow-up and vaccination during the influenza season are recommended to maintain immunity.