Can't I bill CPT 17110 when the doctor uses SWIFT?

To answer your question let me first define CPT 17110-Destruction (eg, laser surgery, electrosurgery, cryosurgery, chemosurgery, surgical curettement), of benign lesions other than skin tags or cutaneous vascular proliferative lesions; up to14 lesions.

Next, SWIFT is microwave therapy, it is considered a non-destructive immune therapy, meaning it stimulates the body's own immune system to fight the wart rather than directly destroying the lesion.

Therefore, understand that insurance won't cover immune therapy only destruction, which is typically what insurance plans cover for wart treatment. A good reference article was done in 2017 titled "Microwave therapy for cutaneous human papilloma virus infection" Ivan BRISTOW et al. Eur J Dermatol 2017; 27(5): 511-8.