The primary diagnosis code is typically Z23 (Encounter for immunization). However, if the immunization is given for a specific reason (e.g., rabies vaccine after an animal bite), the code for the exposure would be the primary diagnosis, with Z23 as a secondary code.

CPT code 90460: Immunization administration of first or only component with counseling
Know more about CPT code 90460, the code for immunization administration of the first or only component of a vaccine/toxoid, its requirements, and guidelines.
Frequently asked questions
Generally, modifier -51 is not appended to the add-on code +90461. Modifier -25 may be appended to an evaluation and management (E/M) code if a significant, separately identifiable E/M service is also performed and documented. Other modifiers might be necessary depending on specific circumstances and payor rules.
Yes, you can bill 90460 for the first or only component of each single-component vaccine administered, provided that counseling is given for each vaccine. For example, if you give a flu shot and a tetanus shot, and provide counseling for both, you would bill 90460 twice.
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