Billing and Coding: Allergen Immunotherapy (AIT) with Subcutaneous Immunotherapy (SCIT)

CPT 95165 covers physician preparation of non-venom allergen extract vials (does not include injections) when an MD/DO has examined the patient and established a treatment plan; documentation must record dose counts, preparer, preparation date, and full extract component details. Billing is limited by vial volume (bill up to 1 cc aliquot equivalents per cc, with a maximum of 10 billable doses per 10 cc vial by PE calculation), a reasonable supply is defined as ≤12 months, multiple vials may be billed when medically necessary, and maintenance claims require modifier EJ; same-day visits with injection services require documentation of a separately identifiable service.

"CPT 95165 covers physician preparation of vials of non-venom antigens for allergen immunotherapy, including calculations of concentration and volume based on the patient's prior skin test results a..."