CPT code 37185 defines an add-on endovascular procedure for treating additional arterial occlusions in the same noncoronary, non‑intracranial vascular family using a combined mechanical thrombectomy and pharmacologic thrombolytic injection with fluoroscopic guidance. As an add‑on code, 37185 is reported when the provider treats a second or subsequent artery or arterial bypass graft after performing the initial same-method intervention on an index vessel. Nationally, this code matters because it captures incremental procedural work and resources when multiple vessels require similar endovascular revascularization during the same encounter.

Key payers discussed include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise explanation of the clinical intent and service setting for 37185, along with the typical situations in which the add‑on code applies. The publication provides benchmarks and coding context for hospital and outpatient interventional settings, explains common use cases in peripheral arterial and graft thrombectomy, and summarizes policy and payment considerations that affect reporting of add‑on endovascular procedures. Content is national in scope and focuses on coding, clinical context, and payer coverage landscape. If specific payer policies, exact reimbursement rates, or local coverage determinations are needed, those details are addressed in payer-specific sections elsewhere.