2025 CPT code 90668

Injection of an inactivated influenza virus into a muscle to provide immunity against a pandemic influenza.

This code should not be reported for seasonal influenza vaccines. Refer to other CPT codes for non-pandemic influenza vaccines or combination vaccines.

The use of modifiers is allowed for codes like 90668, but only when circumstances justify an adjustment to payment based on factors such as reduced services or discontinued procedures. 

Medical necessity is established by the presence of a declared influenza pandemic or an increased risk of contracting the pandemic influenza virus based on the patient's health status, occupation, or other risk factors as determined by public health guidelines.

The healthcare provider prepares the patient and administers the split-virus influenza vaccine into the upper arm muscle. They also counsel the patient, providing instructions and precautions before administering the vaccine.

In simple words: The doctor injects a shot of flu vaccine into your arm to protect you against a type of flu that could spread across a large area. This vaccine uses a weakened form of the flu virus and is designed to boost your immunity and prevent you from getting sick.

Influenza virus vaccine, pandemic formulation, split virus, for intramuscular use.

Example 1: A patient is seen in a clinic during a declared pandemic due to a novel influenza strain. The patient has no known allergies and requests the pandemic influenza vaccine. Code 90668 is reported for the vaccine itself, along with the appropriate administration code., A healthcare worker receives the mandatory pandemic influenza vaccine as part of their employment requirement during an outbreak. Code 90668 and an administration code are reported., A patient at high risk for influenza complications receives the pandemic influenza vaccine ahead of flu season. Along with an administration code, 90668 is reported. 

Documentation should include the type of vaccine administered (pandemic formulation, split virus), the dosage, the route of administration (intramuscular), the site of injection, and any patient reactions or adverse events. 

  • Revenue Code: O1G
  • Payment Status: Active
  • Specialties:Internal Medicine, Family Practice, Pediatrics, Public Health, Occupational Health
  • Place of Service:"Office", "Inpatient Hospital", "Outpatient Hospital", "Public Health Clinic", "Pharmacy"
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