The ICD-10 code to use for flu vaccination is Z23, encounter for immunization. There are many CPT codes to describe influenza vaccine, varying by manufacturer, product and age group.
According to ICD-10-CM guidelines, clinicians may assign code Z28. 310, “Unvaccinated for COVID-19,” when the patient has not received a dose of any COVID-19 vaccine. Clinicians may assign code Z28.
ICD-10 requires only one code (Z23) per vaccination, regardless if single or combination. Report Z23 for all vaccination diagnoses.
The ICD-10-PCS code assignment for the vaccination is 3E01340 for intramuscular injection of the flu vaccine.
ICD-10-CM Description Clinicians may assign code Z28. 311, “Partially vaccinated for COVID-19,” when the patient has received at least one dose of a multi-dose COVID-19 vaccine regimen, but has not received the doses necessary to meet the CDC definition of “fully vaccinated” at the time of the encounter.
Influenza due to identified novel influenza A virus ICD-10-CM J09. X2 is grouped within Diagnostic Related Group(s) (MS-DRG v39.0):
Use the CPT code for the vaccine administered (90686) and link to the diagnosis code for the immunization. Because qualified counseling occurred for a patient younger than 18 years of age, bill 1 unit of 90460 for administering influenza vaccine. Link to the immunization diagnosis code.
Payment Allowances and Effective Dates for the 2021-2022 Flu Season:CodeLabeler NameEffective Dates90672MedImmune08/26/2021 – 07/31/202290674Seqirus08/11/2021 – 07/31/202290682Sanofi Pasteur08/01/2021 – 07/31/202290685Sanofi Pasteur Seqirus08/01/2021 – 07/31/20226 more rows•Dec 22, 2021
If you administer an injection of the influenza vaccine only, report 90471. If you administer an influenza vaccine in addition to other vaccines, report the influenza injection with 90472. Note that code 90471 or 90473 cannot be reported in conjunction with 90460.
Code Z23, which is used to identify encounters for inoculations and vaccinations, indicates that a patient is being seen to receive a prophylactic inoculation against a disease. If the immunization is given during a routine preventive health care examination, Code Z23 would be a secondary code.