CPT code 37188 designates a repeat endovascular procedure combining mechanical thrombectomy with pharmacologic thrombolytic infusion for venous occlusion on a subsequent day of ongoing thrombolytic therapy. This code captures care when the treating clinician returns to perform additional thrombectomy under fluoroscopic guidance as part of a multi-day thrombolysis course. Nationally, procedures addressing acute venous thromboembolism and catheter-directed thrombolysis are high-cost, resource-intensive services delivered primarily in hospital inpatient and hospital outpatient interventional suites, making accurate coding important for clinical documentation, utilization tracking, and payment adjudication.

Key payers covered in this overview include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise explanation of the clinical intent and typical setting for CPT code 37188, plus an outline of what to expect in benchmarking and policy context: national utilization and payment benchmarks where available, common billing considerations, and the clinical circumstances that support use of this repeat endovascular thrombectomy code. Data not available in the input will be noted as such in detailed tables. The content is aimed at billing professionals, clinical leaders, and policy analysts seeking a clear, national-level summary of this specific CPT code and its clinical role in multi-day thrombolytic therapy.