thrombectomy is the surgical or percutaneous extraction of a thrombus (blood clot) from the lumen of a blood vessel in order to re-establish antegrade blood flow and prevent ischemic injury to downstream tissue. It is distinguished from embolectomy (removal of a clot that traveled from a distant site), thrombolysis (chemical dissolution of clot using fibrinolytic agents such as tPA or tenecteplase), and anticoagulation (pharmacologic prevention of new clot formation without direct clot extraction). The underlying mechanism is structural: a solid mass of fibrin, platelets, and trapped erythrocytes occludes the vessel lumen and must be physically dislodged, usually via catheter-based aspiration, stent-retriever deployment, or open surgical arteriotomy/venotomy with Fogarty balloon catheter extraction. It is virtually always a pathological intervention (e.g., acute ischemic stroke, acute limb ischemia, mesenteric ischemia), as thrombus formation in healthy vessels is not a physiological process. The clinically relevant subtypes encountered in coding include intracranial/mechanical cerebral thrombectomy for acute ischemic stroke (I63 codes), peripheral arterial thrombectomy for acute limb ischemia (I74 codes), deep venous thrombectomy for extensive DVT (I82 codes), pulmonary embolectomy/thrombectomy (I26 codes), and coronary thrombectomy during primary PCI for acute MI (I21 codes). thrombectomy is frequently confused with embolectomy — the key distinction is that thrombectomy removes a clot that formed in situ at the site of occlusion, whereas embolectomy removes a clot that originated elsewhere and migrated to the occlusion site; in clinical practice, the same procedural techniques often serve both indications.
The word entered English in the mid-19th century (attested c. 1850s-1870s) as thrombectomy (noun), borrowed via modern medical Latin from the Greek roots θρόμβος + ἐκτομή — literally “cutting out of a clot.” The adjective form thrombectomic (also mid-to-late 19th c.) describes the procedural context (e.g., “thrombectomic extraction”). The root thromb- (“clot, lump”) connects thrombectomy to the entire -thromb- family: thrombus (clot → a solid mass of coagulated blood), thrombosis (clotting condition → pathological formation of a thrombus), thrombolysis (clot dissolution → enzymatic breakdown of clot), thrombocytopenia (clot-cell deficiency → low platelet count), and thrombophlebitis (clot + vein inflammation → inflamed vein with clot). The suffix -ectomy is among the most productive surgical suffixes in medical terminology — it appears in appendectomy, cholecystectomy, mastectomy, nephrectomy, and hysterectomy.
🔀 ALIASES / ALTERNATE TERMS
THROMBECTOMIC(adjective form — clinical collocations include “thrombectomic procedure,” “thrombectomic device,” “thrombectomic intervention”)
CLOT REMOVAL / CLOT EXTRACTION(lay and clinical term; commonly used in patient education and ED documentation — especially in stroke alerts, trauma settings)
MECHANICAL THROMBECTOMY (MT)(define briefly — percutaneous catheter-based clot extraction using stent-retriever or aspiration catheter; the dominant modern approach in acute ischemic stroke)
PERCUTANEOUS MECHANICAL THROMBECTOMY (PMT)(clinical synonym used in interventional radiology and endovascular contexts — coded under CPT 37184-37188)
DIRECT THROMBECTOMY(open surgical clot extraction via arteriotomy/venotomy; often with Fogarty balloon catheter — coded under CPT 34001-34490 series)
ASPIRATION THROMBECTOMY / ADAPT TECHNIQUE(suction-based clot extraction using large-bore aspiration catheter — common in neurointerventional stroke procedures)
STENT-RETRIEVER THROMBECTOMY(etiology/technique subtype — uses a deployable stent to engage and withdraw the thrombus)
CATHETER-DIRECTED THROMBECTOMY(technique subtype — combines mechanical clot maceration with catheter-delivered thrombolytic; often used in iliofemoral DVT)
INTRACRANIAL MECHANICAL THROMBECTOMY(anatomic subtype with ICD-10-CM codes I63.x — the standard-of-care intervention for large vessel occlusion stroke)
PERIPHERAL ARTERIAL THROMBECTOMY(anatomic subtype with ICD-10-CM code range I74.x — performed for acute limb ischemia)
VENOUS THROMBECTOMY(anatomic subtype with ICD-10-CM code range I82.x — performed for massive iliofemoral DVT or phlegmasia cerulea dolens)
PULMONARY THROMBECTOMY / SURGICAL PULMONARY EMBOLECTOMY(anatomic subtype with ICD-10-CM code range I26.x — performed for massive PE with hemodynamic collapse)
🔗 RELATED TERMS
embolectomy — the closest related procedure; removes an embolus (clot that migrated from a distant origin such as the heart or aortic arch) rather than an in-situ thrombus. Same procedural techniques often serve both indications, and both are captured under the CPT 34001-34490 open series and 37184-37188 percutaneous series.
thrombolysis — shares the thromb- root; the chemical/pharmacologic dissolution of clot using fibrinolytic agents (alteplase, tenecteplase, urokinase) rather than physical extraction; often used as an adjunct to or alternative to thrombectomy.
thrombosis — the underlying pathological process being treated; formation of a thrombus within a vascular lumen, the condition that necessitates thrombectomy.
embolism — complex overlapping condition; often the indication for embolectomy rather than thrombectomy, but in practice stroke and PE protocols treat both under similar endovascular workflows.
Fogarty catheter — the classic surgical mechanism/device; a balloon-tipped embolectomy/thrombectomycatheter introduced via arteriotomy and withdrawn to extract clot mechanically.
stent retriever — modern endovascular device class (e.g., Solitaire, Trevo) deployed intracranially or peripherally to capture and retrieve thrombus.
aspiration thrombectomy — suction-based clot-extraction technique that often complements stent-retriever thrombectomy (combined “SWIM” or “Solumbra” technique).
acute ischemic stroke — the highest-volume indication for mechanical thrombectomy; ICD-10-CM codes I63.0xx-I63.9, with large-vessel occlusion subtypes (I63.3x, I63.4x, I63.5x) driving thrombectomy eligibility.
acute myocardial infarction — coronary indication for aspiration or mechanical thrombectomy during primary PCI; ICD-10-CM I21.0x-I21.4x (STEMI) and I21.Ax (MI with documented coronary thrombosis).
heparin-induced thrombocytopenia — prothrombotic disease entity that predisposes to extensive thrombosis requiring thrombectomy; ICD-10-CM D75.82.
digital subtraction angiography] — primary diagnostic/imaging modality used intra-procedurally to localize the thrombus and confirm revascularization post-thrombectomy; CPT 75625, 75710, 75716.
Acute embolism and thrombosis of right popliteal vein
I82.432
Acute embolism and thrombosis of left popliteal vein
I82.441
Acute embolism and thrombosis of right tibial vein
I82.442
Acute embolism and thrombosis of left tibial vein
I82.491
Acute embolism and thrombosis of other specified deep veins of right lower extremity
I82.492
Acute embolism and thrombosis of other specified deep veins of left lower extremity
I82.501
Chronic embolism and thrombosis of unspecified deep veins of right lower extremity
I82.502
Chronic embolism and thrombosis of unspecified deep veins of left lower extremity
I82.601
Acute embolism and thrombosis of unspecified veins of right upper extremity
I82.602
Acute embolism and thrombosis of unspecified veins of left upper extremity
I82.611
Acute embolism and thrombosis of right subclavian vein
I82.612
Acute embolism and thrombosis of left subclavian vein
I82.621
Acute embolism and thrombosis of right axillary vein
I82.622
Acute embolism and thrombosis of left axillary vein
I82.90
Embolism and thrombosis of unspecified vein
I82.91
Embolism and thrombosis of jugular vein
Pulmonary Embolism (I26 — Indication for Surgical Pulmonary Embolectomy/Thrombectomy)
Code
Description
I26.01
Septic pulmonary embolism with acute cor pulmonale
I26.02
Saddle embolus of pulmonary artery with acute cor pulmonale
I26.09
Other pulmonary embolism with acute cor pulmonale
I26.90
Septic pulmonary embolism without acute cor pulmonale
I26.92
Saddle embolus of pulmonary artery without acute cor pulmonale
I26.99
Other pulmonary embolism without acute cor pulmonale
Acute Myocardial Infarction (I21 — Indication for Coronary Thrombectomy During Primary PCI)
Code
Description
I21.01
ST elevation (STEMI) myocardial infarction involving left main coronary artery
I21.02
STEMI involving left anterior descending coronary artery
I21.09
STEMI involving other coronary artery of anterior wall
I21.11
STEMI involving right coronary artery
I21.19
STEMI involving other coronary artery of inferior wall
I21.21
STEMI involving left circumflex coronary artery
I21.29
STEMI involving other sites
I21.3
STEMI of unspecified site
I21.4
Non-ST elevation (NSTEMI) myocardial infarction
I21.A1
Myocardial infarction type 2
I21.A9
Other myocardial infarction type
I21.-
Acute myocardial infarction (category only, not billable — shown for hierarchy reference)
Complications of Vascular Devices and Graft Thrombosis (T82 — Indication for Thrombectomy of Graft/Shunt)
Code
Description
T82.817A
Occlusion of coronary bypass graft, initial encounter
T82.817D
Occlusion of coronary bypass graft, subsequent encounter
T82.817S
Occlusion of coronary bypass graft, sequela
T82.818A
Occlusion of other specified cardiac and vascular prosthetic devices, implants and grafts, initial encounter
T82.867A
Thrombosis due to cardiac prosthetic devices, implants and grafts, initial encounter
T82.868A
Thrombosis due to other vascular prosthetic devices, implants and grafts, initial encounter
T82.868D
Thrombosis due to other vascular prosthetic devices, subsequent encounter
🔧 COMMON CPT CODES (Thrombectomy-Related Procedures)
CPT Code
Description
34001
Embolectomy or thrombectomy, with or without catheter; carotid, subclavian or vertebral artery, by neck incision
34051
Embolectomy or thrombectomy, with or without catheter; innominate, carotid, subclavian artery, by thoracic incision
34101
Embolectomy or thrombectomy, with or without catheter; axillary-brachial artery, by arm incision
34111
Embolectomy or thrombectomy, with or without catheter; radial or ulnar artery, by arm incision
34151
Embolectomy or thrombectomy, with or without catheter; aortoiliac artery, by abdominal incision
34201
Embolectomy or thrombectomy, with or without catheter; femoropopliteal, aortoiliac artery, by leg incision
34203
Embolectomy or thrombectomy, with or without catheter; popliteal-tibio-peroneal artery, by leg incision
34401
Thrombectomy, direct or with catheter; vena cava, iliac vein, by abdominal incision
34451
Thrombectomy, direct or with catheter; innominate and subclavian vein, by neck incision
34471
Thrombectomy, direct or with catheter; axillary and subclavian vein, by arm incision
34490
Thrombectomy, direct or with catheter; femoral and iliac vein, by groin incision
34510
Thrombectomy, direct or with catheter; vena cava, by abdominal incision
34520
Cross-over ilio-iliac vein graft (Palma-Keown procedure) for venous thrombosis
37184
Primary percutaneous transluminal mechanical thrombectomy, noncoronary, arterial or arterial bypass graft, including fluoroscopic guidance and intraprocedural pharmacological thrombolytic injection(s), initial vessel
37185
Primary percutaneous transluminal mechanical thrombectomy, noncoronary — each additional vessel (list separately in addition to 37184)
37186
Secondary percutaneous transluminal thrombectomy, noncoronary, arterial or arterial bypass graft, any method
37187
Percutaneous transluminal mechanical thrombectomy, vein, including intraprocedural pharmacological thrombolytic injections and fluoroscopic guidance
37188
Percutaneous transluminal thrombectomy, vein, secondary (add-on to 37187)
61645
Intracranial mechanical thrombectomy; percutaneous transcatheter removal of thrombus, including access, angiography, and all imaging guidance
92941
Percutaneous transluminal revascularization of acute total/subtotal occlusion during AMI, coronary artery, single vessel (includes coronary thrombectomy)
⚠️ Coding Note: (1) ICD-10-CM codes in the I63, I74, I82, and I26 families all require 6th- or 7th-character laterality and encounter specificity — verify right/left/bilateral designation and initial/subsequent/sequela status before final code selection. (2) Sequencing logic: when thrombectomy is performed for an acute thromboembolic event, code the acute thrombosis/embolism first (e.g., I63.311 or I82.411) followed by any underlying predisposing condition (e.g., atrial fibrillation I48.0, HIT D75.82, hypercoagulable state D68.61); for stroke[thrombectomy], report NIHSS score via R29.7xx codes per payer requirements. (3) Undercoding alert: “acute limb ischemia” or “acute mesenteric ischemia” documented in the H&P should trigger a query to clarify the specific artery involved — many claims default to I74.4 or I74.9 when I74.2 or I74.5 would better capture clinical acuity and resource use. (4) Modifier considerations: append modifier -22 when thrombectomy is unusually complex (e.g., multiple device exchanges, tandem occlusions, intraprocedural hemorrhage); modifier -59 or -XU when bilateral procedures are performed at separate sites on the same date; and modifier -RT/-LT when payer requires laterality on CPT rather than relying solely on ICD-10-CM laterality. Prior authorization is generally exempted for emergent acute ischemic strokethrombectomy (within the 24-hour window per AHA/ASA guidelines) but is often required for elective DVT thrombectomy. (5) Type/specimen specificity: intracranial thrombectomy requires documentation of large-vessel occlusion (ICA, M1, basilar, or proximal M2 segment) on CTA/MRA to support medical necessity and for treatment authorization by most commercial and Medicare Advantage payers; peripheral PMT (37184) requires documentation of failed anticoagulation or limb-threatening ischemia (Rutherford classification IIb/III) to avoid downcoding or denial.
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