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Official Description

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

© Copyright 2025 American Medical Association. All rights reserved.

Common Language Description

A trivalent, split virus, preservative-free influenza vaccine (IIV3) is designed for intramuscular administration. This vaccine differs from immune globulins, which provide short-term, passive immunity; instead, it offers active, long-term immunity. The mechanism of action involves exposing the recipient's immune system to altered versions of specific influenza viruses, prompting the immune system to produce its own antibodies. This process enables the body to "remember" how to generate antibodies upon subsequent exposure to the same antigens. The formulation is specifically preservative-free, meaning it does not contain the preservative thimerosal or contains only trace amounts, thus classified as either thimerosal-free or thimerosal-reduced. The U.S. Food and Drug Administration (FDA) recognizes both formulations as preservative-free. The vaccine is administered via intramuscular injection, which is a separate procedure that should be reported independently. The production of the influenza vaccine involves the use of embryonated chicken eggs, where the virus is harvested, inactivated with formaldehyde, concentrated, purified, and chemically disrupted to create a split virus. This trivalent vaccine is formulated to protect against three specific influenza viruses, including two distinct strains of influenza type A and one strain of influenza type B. For coding purposes, the CPT® code 90656 is designated for the 0.5 mL dosage of this vaccine, while code 90655 is used for a 0.25 mL dosage, with both codes solely reporting the vaccine product used.

© Copyright 2025 Coding Ahead. All rights reserved.

1. Indications

The trivalent, split virus, preservative-free influenza vaccine (IIV3) is indicated for the prevention of influenza caused by specific strains of the virus. The vaccine is recommended for individuals who are at risk of influenza complications, including but not limited to:

  • High-Risk Populations Individuals with chronic health conditions, such as asthma, diabetes, or heart disease, who may experience severe illness from influenza.
  • Healthcare Workers Professionals who are in close contact with patients and are at increased risk of exposure to the influenza virus.
  • Older Adults Individuals aged 65 years and older, who are more susceptible to severe influenza-related complications.
  • Pregnant Women Women who are pregnant during the influenza season, as they are at higher risk for severe illness.
  • Children Young children, particularly those under the age of 5, who are at a higher risk for hospitalization due to influenza.

2. Procedure

The administration of the trivalent, split virus, preservative-free influenza vaccine involves several key procedural steps:

  • Step 1: Preparation Prior to administration, the vaccine must be prepared according to the manufacturer's guidelines. This includes ensuring that the vaccine is at the appropriate temperature and that the vial is inspected for any particulate matter or discoloration.
  • Step 2: Patient Assessment The healthcare provider should assess the patient for any contraindications or previous adverse reactions to influenza vaccines. This assessment may include reviewing the patient's medical history and current health status.
  • Step 3: Injection Site Selection The provider selects an appropriate injection site, typically the deltoid muscle of the upper arm for adults and older children, or the anterolateral thigh for infants and young children.
  • Step 4: Administration The vaccine is administered via intramuscular injection. The provider should use a sterile needle and syringe, and the injection should be given at a 90-degree angle to ensure proper delivery into the muscle.
  • Step 5: Post-Administration Care After the injection, the provider should observe the patient for a brief period to monitor for any immediate adverse reactions. The patient should be informed about potential side effects and the importance of reporting any unusual symptoms.

3. Post-Procedure

Post-procedure care for the administration of the influenza vaccine includes monitoring the patient for any immediate adverse reactions, such as allergic responses or injection site reactions. Patients may experience mild side effects, including soreness at the injection site, low-grade fever, or fatigue, which typically resolve within a few days. It is important to provide patients with information regarding these potential side effects and to encourage them to seek medical attention if they experience severe or persistent symptoms. Additionally, patients should be advised to continue practicing preventive measures against influenza, such as hand hygiene and avoiding close contact with sick individuals, especially during flu season.

Short Descr IIV3 VACC NO PRSV 0.5 ML IM
Medium Descr IIV3 VACC PRESERVATIVE FREE 0.5 ML DOSAGE IM USE
Long Descr Influenza virus vaccine, trivalent (IIV3), split virus, preservative free, 0.5 mL dosage, for intramuscular use
Related Drugs Afluria
Status Code Statutory Exclusion (from MPFS, may be paid under other methodologies)
Global Days XXX - Global Concept Does Not Apply
PC/TC Indicator (26, TC) 9 - Not Applicable
Multiple Procedures (51) 9 - Concept does not apply.
Bilateral Surgery (50) 9 - Concept does not apply.
Physician Supervisions 09 - Concept does not apply.
Assistant Surgeon (80, 82) 9 - Concept does not apply.
Co-Surgeons (62) 9 - Concept does not apply.
Team Surgery (66) 9 - Concept does not apply.
Diagnostic Imaging Family 99 - Concept Does Not Apply
APC Status Indicator Influenza, Pneumococcal Pneumonia, Hepatitis B, and Covid-19 Vaccines; Monoclonal Antibody Therapy Product
ASC Payment Indicator Influenza vaccine; pneumococcal vaccine.
Type of Service (TOS) V - Pneumococcal/Flu Vaccine
Berenson-Eggers TOS (BETOS) O1G - Immunizations/Vaccinations
MUE 1
CCS Clinical Classification 228 - Prophylactic vaccinations and inoculations
25 Significant, separately identifiable evaluation and management service by the same physician or other qualified health care professional on the same day of the procedure or other service: it may be necessary to indicate that on the day a procedure or service identified by a cpt code was performed, the patient's condition required a significant, separately identifiable e/m service above and beyond the other service provided or beyond the usual preoperative and postoperative care associated with the procedure that was performed. a significant, separately identifiable e/m service is defined or substantiated by documentation that satisfies the relevant criteria for the respective e/m service to be reported (see evaluation and management services guidelines for instructions on determining level of e/m service). the e/m service may be prompted by the symptom or condition for which the procedure and/or service was provided. as such, different diagnoses are not required for reporting of the e/m services on the same date. this circumstance may be reported by adding modifier 25 to the appropriate level of e/m service. note: this modifier is not used to report an e/m service that resulted in a decision to perform surgery. see modifier 57 for significant, separately identifiable non-e/m services, see modifier 59.
59 Distinct procedural service: under certain circumstances, it may be necessary to indicate that a procedure or service was distinct or independent from other non-e/m services performed on the same day. modifier 59 is used to identify procedures/services, other than e/m services, that are not normally reported together, but are appropriate under the circumstances. documentation must support a different session, different procedure or surgery, different site or organ system, separate incision/excision, separate lesion, or separate injury (or area of injury in extensive injuries) not ordinarily encountered or performed on the same day by the same individual. however, when another already established modifier is appropriate it should be used rather than modifier 59. only if no more descriptive modifier is available, and the use of modifier 59 best explains the circumstances, should modifier 59 be used. note: modifier 59 should not be appended to an e/m service. to report a separate and distinct e/m service with a non-e/m service performed on the same date, see modifier 25.
GC This service has been performed in part by a resident under the direction of a teaching physician
GV Attending physician not employed or paid under arrangement by the patient's hospice provider
Q6 Service furnished under a fee-for-time compensation arrangement by a substitute physician or by a substitute physical therapist furnishing outpatient physical therapy services in a health professional shortage area, a medically underserved area, or a rural area
SL State supplied vaccine
U1 Medicaid level of care 1, as defined by each state
Date
Action
Notes
2017-01-01 Changed Long, Medium and Short descriptions changed.
2016-01-01 Changed First appearance of change in codebook.
2015-07-01 Changed Description Changed
2013-01-01 Changed Description Changed
2008-01-01 Changed Code description changed.
2007-01-01 Changed Code description changed.
2005-01-01 Added First appearance in code book in 2005.
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