Summary & Overview
CPT 0645T: Percutaneous Implantation of Coronary Sinus Reduction Device
CPT code 0645T describes a percutaneous, catheter-delivered procedure to place a reduction device in the coronary sinus. This minimally invasive cardiac intervention targets the coronary venous system to alter venous dimensions or flow and can be part of treatments for select cardiac conditions. The code captures a specialized structural heart procedure with implications for hospital outpatient and catheterization lab workflows and payer coverage policies nationwide.
Key payers discussed include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of the clinical context and service setting, benchmarks where available, and the policy and billing considerations that influence coverage and reimbursement. The analysis addresses typical sites of service, common clinical indications implied by the procedure, and how this code fits into ambulatory cardiac intervention portfolios. Where input data is incomplete, the report notes missing elements as "Data not available in the input." The content is intended for payers, hospital revenue leaders, and clinicians involved in structural heart programs who need a clear national-level summary of what CPT code 0645T represents and what to expect when it appears on a claim.
Billing Code Overview
CPT code 0645T describes a catheter-based procedure in which a provider navigates a catheter through the blood vessels to place a reduction device in the coronary sinus, the heart's largest venous structure. This procedure is a minimally invasive cardiac intervention aimed at modifying coronary venous anatomy or function via an implanted or delivered reduction device.
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Service type: Percutaneous transvascular implantation of a coronary sinus reduction device
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Typical site of service: Hospital outpatient department or catheterization laboratory (ambulatory procedure setting is common)
Data not available in the input for associated taxonomies, ICD-10 diagnoses, and related codes.
Clinical & Coding Specifications
Clinical Context
A typical patient is a 65-year-old with chronic ischemic heart disease and refractory angina despite optimized medical therapy and prior revascularization. The patient reports persistent exertional chest pain limiting activities of daily living. Noninvasive testing and coronary angiography demonstrate patent or incompletely revascularized coronary arteries with persistent microvascular ischemia and/or evidence of ischemia in territories not amenable to further percutaneous coronary intervention. The interventional cardiology team evaluates the patient for coronary sinus reduction device placement to increase coronary venous pressure and redistribute myocardial perfusion.
The clinical workflow includes pre-procedure evaluation (cardiology consultation, informed consent, anticoagulation management), vascular access (typically femoral or jugular vein), fluoroscopically guided catheter navigation into the coronary sinus, deployment of the reduction device within the coronary sinus, immediate angiographic and hemodynamic assessment, and post-procedure observation in an outpatient or inpatient cardiology setting depending on patient comorbidity. Imaging and device function are documented, and discharge instructions include antiplatelet/anticoagulation plan and follow-up with cardiology for device assessment and symptom monitoring.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
22 | Unusual procedural services | Use when work required is substantially greater than typically required for 0645T and documentation supports increased complexity. |
23 | Unusual anesthesia | Use when general anesthesia is medically necessary for a procedure that normally requires local or no anesthesia. |
51 | Multiple procedures | Use when 0645T is billed on the same day as other surgical procedures; appended to secondary procedures per payer rules. |
52 | Reduced services | Use when the procedure is partially reduced or not completed but still performed in part. |
53 | Discontinued procedure | Use when the procedure is started but discontinued due to patient safety or unforeseen condition. |
62 | Two surgeons | Use when two surgeons work together as primary surgeons performing distinct portions of the procedure. |
66 | Surgical team | Use when a surgical team services approach is billed for complex procedures requiring multiple surgical specialists. |
73 | Discontinued outpatient procedure prior to anesthesia | Use when outpatient procedure is terminated before anesthesia for reasons related to the patient. |
78 | Unplanned return to the operating room by the same physician following initial procedure | Use when an unplanned return to OR is required for a related procedure after the initial 0645T. |
80 | Assistant surgeon | Use when an assistant surgeon is documented and required for the procedure. |
81 | Minimum assistant surgeon | Use when a minimal assistant surgeon is documented and required. |
82 | Assistant surgeon when qualified resident not available | Use when no qualified resident is available and an assistant surgeon is required. |
AS | Physician assistant, nurse practitioner, or clinical nurse specialist services for assistant at surgery | Use when an advanced practice clinician serves as an assistant at surgery and payer allows payment. |
QX | Qualified nonphysician health care professional | Use when services are furnished by a qualified nonphysician under Medicare rules and modifier QX is required. |
| Taxonomy Code | Specialty | Notes |
|---|---|---|
| 207RC0000X | Interventional Cardiology | Primary specialty performing catheter-based coronary sinus device placement. |
| 207R00000X | Cardiovascular Disease (General Cardiology) | Cardiologists involved in evaluation and follow-up. |
| 207T00000X | Surgical Cardiac Electrophysiology | May be involved when device placement overlaps with electrophysiology procedures or venous access management. |
| 208000000X | Thoracic Surgery | Occasionally involved for complex access or hybrid approaches. |
Related Diagnoses
| ICD-10 Code | Description | Clinical Relevance |
|---|---|---|
I25.110 | Atherosclerotic heart disease of native coronary artery with unstable angina | Refractory ischemia and angina may prompt consideration of coronary sinus reduction device. |
I20.9 | Angina pectoris, unspecified | Symptom indication for therapies aimed at reducing angina burden when revascularization is not feasible. |
I25.810 | Atherosclerosis of coronary artery bypass graft(s) and coronary artery disease of native coronary artery | Persistent ischemia after prior CABG can lead to evaluation for alternative therapies. |
I50.9 | Heart failure, unspecified | Patients with ischemia-induced heart failure symptoms may be candidates when ischemia contributes to symptoms. |
I73.9 | Peripheral vascular disease, unspecified | Common comorbidity impacting vascular access and procedural risk assessment. |
R07.9 | Chest pain, unspecified | Presenting symptom leading to diagnostic evaluation and eventual consideration of coronary sinus device therapy. |
Related CPT Codes
| CPT Code | Description | Relationship to This Procedure |
|---|---|---|
93458 | Catheter placement in coronary artery(s) including intraprocedural injections for coronary angiography, when performed; includes left heart catheterization when performed | May be performed before 0645T for diagnostic coronary angiography and to define coronary anatomy and ischemic territories. |
36010 | Introduction of catheter, non-tunneled, percutaneous, central venous access; for diagnostic purposes, each additional catheter | Used when central venous access (e.g., internal jugular) is obtained to facilitate coronary sinus catheter navigation. |
93533 | Insertion and placement of percutaneous intracoronary stent(s), with coronary angioplasty when performed; intracoronary device procedures | May be contemporaneous if additional interventional coronary procedures are required during the same session. |
93580 | Insertion of flow-directed catheter (e.g., Swan-Ganz) for monitoring, for cardiac hemodynamics | Hemodynamic monitoring may be used peri-procedure in select high-risk patients undergoing 0645T. |
51798 | Complex urethral catheterization, with or without irrigation, with other urologic procedures (listed to show catheter-related codes) | Data not available in the input. |