In simple words: This code covers a flu shot.The doctor gives a shot of medicine (0.25 mL) into a muscle to help protect against the flu.

This CPT code, 90657, represents the administration of an influenza virus vaccine, trivalent (IIV3), split virus, in a 0.25 mL intramuscular dose.The vaccine is designed to provide immunity against three strains of the influenza virus.This code should be reported in conjunction with an immunization administration code (e.g., 90460, 90461, 90471, 90472, 90473, 90474)but not with 90480 (SARS-CoV-2 vaccine administration).Separate codes exist for combination vaccines; do not code each component separately. If a specific vaccine code isn't available, report the unlisted procedure code.

Example 1: A 65-year-old patient presents for their annual influenza vaccination.The provider administers a 0.25 mL dose of the trivalent, split-virus influenza vaccine intramuscularly.Code 90657 is reported along with the appropriate administration code., A pediatric patient receives the 0.25 mL dose of the trivalent split virus influenza vaccine as part of their well-child visit.Code 90657 is reported, along with the administration code and appropriate E&M code., During a routine check-up, a pregnant patient receives the 0.25 mL intramuscular dose of the trivalent, split virus influenza vaccine. Code 90657 is reported, along with the administration code and appropriate E&M code.Documentation should specifically note the pregnancy status and any precautions taken.

* Patient's age and medical history.* Vaccine administered (manufacturer, lot number, expiration date).* Dosage (0.25 mL).* Route of administration (intramuscular).* Site of injection.* Date of administration.* Any adverse reactions.* Pre-immunization counseling documentation.* Informed consent.

** The information provided here is for guidance only.Always refer to the official CPT codebook and relevant payer guidelines for the most up-to-date coding and billing information.