ICD-10-CM Code for Encounter for immunization Z23.
If the immunization is related to exposure (eg, the administration of a Tdap vaccine as a part of wound care), the ICD-10 code describing the exposure should be used as the primary diagnosis code for the vaccine, and Z23 should be used as the secondary code.
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.
Tetanus and Diphtheria Vaccinations Billing GuidelinesCPT CodeICD-1090715S61011A90471S61011AAug 30, 2018
Z23 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. The 2022 edition of ICD-10-CM Z23 became effective on October 1, 2021.
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.
For immunization administration other than COVID-19, codes 90460–90474 are reported for the administration of the vaccine, along with the appropriate vaccine/toxoid code (90476–90756) targeting the organism.
90471: Immunization administration for percutaneous, intra-dermal, subcutaneous or intramuscular injections, initial.
Vaccine Administration Code(s) Administration codes track which dose in the regimen is being administered. NDC 10/NDC11 The National Drug Code (NDC) uniquely identifies human drugs in the United States; it can be found on the vial containing the vaccine.
Medical providers who “buy and bill” for the Tdap vaccine should use the Current Procedural Terminology (CPT) code 90715. For administration of the vaccine, providers should bill CPT code 90471 or 90472, as appropriate.
Article - Billing and Coding: Tetanus Immunization (A52438)