Conductive gel or paste, for use with electrical device (e.g., tens, nmes), per

A4558 (“Conductive gel or paste, for use with electrical device (e.g., tens, nmes), per”) is a code used to bill for equipment, supplies, drugs, or non-physician services in the HCPCS Level II code set. Whether it is billed — and whether a payer covers it — depends on the clinical setting, documentation, and plan rules.