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2025 CPT code 90658

Influenza virus vaccine, trivalent (IIV3), split virus, 0.5 mL dosage, for intramuscular use.

This code should be reported in conjunction with an immunization administration code (e.g., 90471-90474).Modifier 51 should not be used with this code when reported with an administration code.

Modifiers may be applicable in specific circumstances (e.g., modifier 33 for preventive services).

Influenza vaccination is medically necessary for the prevention of influenza, a potentially serious respiratory illness.Medical necessity is generally determined based on age, risk factors (e.g., chronic illnesses, pregnancy), and community prevalence of influenza.

The provider discusses immunization options with the patient (or guardian), explaining the risks, benefits, and potential side effects. After proper preparation, the provider administers the vaccine intramuscularly.

In simple words: This code describes a flu shot given in the muscle. The shot is 0.5 mL and protects against three common types of the flu virus. It does not contain preservatives.

This code represents the administration of a 0.5 mL dose of a trivalent, split virus, influenza vaccine into a muscle.The vaccine is preservative-free and designed to protect against three different strains of influenza.

Example 1: A 5-year-old child receives their annual flu shot., A 60-year-old patient with a history of asthma receives the influenza vaccine., A pregnant woman receives the preservative-free influenza vaccine.

Documentation should specify the product administered (including dosage and type), the administration route (intramuscular), the site of administration, and the purpose (e.g., annual vaccination, high-risk patient).

** For different dosages or forms of influenza vaccines, refer to other relevant CPT codes (e.g., 90655, 90656, 90657). Always ensure accurate documentation and coding to support medical necessity and proper reimbursement.

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