Clinical Context
A 62-year-old patient presents with progressive unilateral lower extremity swelling, pain, and decreased dorsalis pedis pulse over 24–48 hours. Duplex ultrasound demonstrates extensive acute deep venous thrombosis of the femoral and popliteal veins with concern for limb-threatening ischemia or significant symptom burden. Interventional radiology evaluates the patient and recommends catheter-directed thrombolysis for targeted clot dissolution. On the initial treatment day the interventionalist obtains informed consent, performs venous access (commonly popliteal or common femoral), advances a multi-sidehole infusion catheter into the thrombus, administers a thrombolytic agent via the catheter, and provides radiological supervision and interpretation (fluoroscopic guidance, contrast injections to confirm position). Post-procedure care includes ICU or step-down monitoring for bleeding and neurovascular checks, serial labs (hematology and fibrinogen), and imaging follow-up. Typical sites of service are the hospital interventional suite or the inpatient radiology department, often billed as an inpatient procedure on day 0 (initial day of catheter-directed thrombolytic infusion).
Coding Specifications
| Modifier | Description | When to Use |
|---|
11 | Normally reported service | Use when the service represents the usual, standard performance of the procedure. |
| 22 | Increased procedural services | Use when work, time, and complexity significantly exceed the typical service.
| 52 | Reduced services | Use when the procedure is partially reduced or not completed as described.
| 53 | Discontinued procedure | Use when the procedure is started but halted due to extenuating circumstances.
| 59 | Distinct procedural service | Use to indicate a separate and distinct service not normally reported together.
| 62 | Two surgeons | Use when two surgeons share responsibility for a complex case.
| 78 | Unplanned return to the operating/procedure room by same physician following initial procedure for a related procedure during the postoperative period | Use for a reintervention related to complications of the initial thrombolysis.
| RT | Right side | Use to designate the right extremity when laterality is required.
| LT | Left side | Use to designate the left extremity when laterality is required.
| QX | Physician modifier: ordering/servicing/performing practitioner criteria met | Use when the supervising physician also performs qualifying duties per payer policy.
| QK | Medical direction of two, three, or four qualifying individuals | Use when the reporting physician medically directs multiple qualified individuals.
| QY | Attending/performing physician meets specific requirements | Use where the physician meets criteria to bill the service directly.
| ET | Educational or training service for a resident | Use when the service involves a teaching physician with resident participation per payer rules.
| 62 | Two surgeons | Use when co-surgeon performs separate portions of the procedure.
| 79 | Unrelated procedure or service by the same physician during the postoperative period | Not in the provided list; not included.
| Taxonomy Code | Specialty | Notes |
|---|
207P00000X | Vascular Surgery | Primary specialty performing venous thrombolysis and hybrid vascular procedures. |
| 207RP1001X | Interventional Radiology | Common provider performing catheter-directed thrombolysis and image guidance.
| 208000000X | General Surgery | General surgeons with vascular expertise who may perform venous interventions.
| 207L00000X | Cardiovascular Disease (Interventional) | Interventional cardiologists who perform endovascular venous procedures in some centers.
| 3336C0002X | Critical Care Medicine | Intensivists involved in post-procedure monitoring and management.
Related Diagnoses
| ICD-10 Code | Description | Clinical Relevance |
|---|
I82.401 | Acute embolism and thrombosis of unspecified deep veins of right lower extremity | Right-sided acute DVT often treated with catheter-directed thrombolysis when limb-threatening or severe. |
| I82.402 | Acute embolism and thrombosis of unspecified deep veins of left lower extremity | Left-sided acute DVT indication for targeted thrombolytic infusion when appropriate.
| I82.409 | Acute embolism and thrombosis of unspecified deep veins of unspecified lower extremity | General code for acute lower-extremity DVT when laterality unspecified.
| I82.90 | Acute embolism and thrombosis of unspecified vein, unspecified site | Use when thrombus location is not otherwise specified but thrombolysis is performed.
| I82.891 | Chronic embolism and thrombosis of other specified veins | Chronic thrombotic disease may require catheter-directed therapy in select circumstances.
| I82.403 | Acute embolism and thrombosis of deep veins of bilateral lower extremities | Bilateral extensive DVT potentially requiring more complex intervention and monitoring.
| T81.0XXA | Hemorrhage and hematoma complicating a procedure, initial encounter | Relevant as a potential complication monitored after thrombolytic infusion.
Related CPT Codes
| CPT Code | Description | Relationship to This Procedure |
|---|
37211 | Catheter-directed thrombolysis, peripheral; infusion only (initial treatment day) | Often billed for subsequent days of continuous infusion when no vascular access or thrombolytic infusion catheter placement is performed that day; complements 37212 when infusion continues. |
| 37213 | Catheter-directed thrombolysis, peripheral, including radiological supervision and interpretation, and power injection(s) when performed; infusion followed by pharmacomechanical thrombolysis (initial treatment day) | Used when pharmacomechanical thrombolysis (mechanical fragmentation or aspiration) is performed in addition to catheter-directed infusion on the initial day.
| 36010 | Introduction of needle or intracatheter, central venous access, without subcutaneous port or pump, age 5 years or older | May be used if separate central venous access is required for infusion unrelated to the thrombolysis catheter (billing dependent on documentation).
| 75989 | Other vascular interpretation, including radiological supervision and interpretation | Used for additional diagnostic venography or advanced interpretation procedures performed during the intervention.
| 93970 | Duplex scan of extremity veins including responses to compression and other maneuvers; complete bilateral study | Commonly performed pre- and post-procedure to document clot burden and procedural outcome.