Clinical Context
A 68-year-old patient with symptomatic high-grade intracranial atherosclerotic stenosis of the internal carotid artery presents with recurrent transient ischemic attacks despite optimal medical therapy. The neurointerventional team evaluates the patient in the angiography suite. Under conscious sedation or general anesthesia, the provider obtains percutaneous arterial access (commonly the right common femoral artery), advances a guide catheter to the cervical carotid, and navigates a microcatheter and angioplasty balloon to the intracranial stenotic segment under fluoroscopic guidance. After angiographic confirmation of the lesion and roadmapping, the operator inflates a small compliant or noncompliant balloon to dilate the stenotic artery, restores luminal diameter, and assesses for residual stenosis and complications (dissection, perforation). Postprocedure, the patient is transferred to a monitored setting for neurovascular observation with neuro checks, blood pressure control, and antiplatelet management. Typical documentation includes indication, access site, vessels treated, balloon type and size, inflation pressures and durations, procedural complications, and immediate angiographic result.
Coding Specifications
| Modifier | Description | When to Use |
|---|
00 | Default (no modifier) | Use when no special circumstances apply. |
| 11 | Primary procedure | Rarely used by facilities; may be applied by some payors to indicate the primary billed procedure. |
| 22 | Increased procedural services | Use when work or complexity substantially exceeds typical expectations and documentation supports the increased work for the angioplasty. |
| 23 | Unusual anesthesia | Use when procedure requires general anesthesia for an emergency or extenuating circumstance beyond typical sedation. |
| 26 | Professional component | Use when reporting only the physician's professional component separate from facility technical services. |
| 52 | Reduced services | Apply when the angioplasty is started but not completed as documented (partial procedure). |
| 53 | Discontinued procedure | Use if procedure is halted for patient safety prior to therapeutic dilation. |
| 59 | Distinct procedural service | Use when a separately identifiable service (e.g., a diagnostic angiogram) is performed on a separate vessel or session and must be distinguished from the angioplasty. |
| 62 | Two surgeons | Apply when two surgeons with different specialties perform parts of the procedure and payor allows shared or team reporting. |
| 66 | Surgical team | Use when the procedure is performed by an authorized surgical team with separate reimbursable team members. |
| 78 | Return to OR for related procedure | Use if the patient returns to the operating room within the global period for a related complication (e.g., surgical repair of access site). |
| 80 | Assistant surgeon | Use when an assistant surgeon participates and documentation supports assistant involvement. |
| 81 | Minimum assistant surgeon | Use when minimal assistant surgeon services are furnished and supported. |
| AS | Physician assistant, nurse practitioner, or clinical nurse specialist services | Use when one of these practitioners performs the service and payer accepts their billing for this code. |
| Taxonomy Code | Specialty | Notes |
|---|
| 2084P0800X | Interventional Cardiology | Some interventional cardiologists perform endovascular cerebral interventions in hybrid practices. |
| 2084N0400X | Interventional Radiology | Common specialty performing cerebral angioplasty and endovascular neurointerventions. |
| 207RH0000X | Neurological Surgery | Neurosurgeons with endovascular training commonly perform intracranial angioplasty. |
| 207XS0114X | Vascular Neurology | Vascular neurologists with endovascular credentials participate in diagnosis and procedural planning. |
| 2084P0802X | Endovascular Surgical Neuroradiology | Subspecialty taxonomy for providers focused on neuroendovascular procedures. |
Related Diagnoses
| ICD-10 Code | Description | Clinical Relevance |
|---|
I65.29 | Occlusion and stenosis of unspecified carotid artery | Intracranial or extracranial carotid stenosis that may be treated with angioplasty when symptomatic. |
| I63.9 | Cerebral infarction, unspecified | Ischemic stroke caused by arterial stenosis where revascularization such as angioplasty may be considered in selected cases. |
| G45.9 | Transient cerebral ischemic attack, unspecified | Recurrent TIAs due to high-grade intracranial stenosis prompting angioplasty. |
| I66.9 | Occlusion and stenosis of unspecified cerebral artery | Cerebral artery stenosis amenable to endovascular dilation. |
| I67.829 | Other cerebral atherosclerosis | Underlying atherosclerotic disease leading to focal intracranial stenosis treated by angioplasty. |
Related CPT Codes
| CPT Code | Description | Relationship to This Procedure |
|---|
61630 | Percutaneous transluminal angioplasty of intracranial vessel(s) | Primary procedure: balloon dilation of intracranial atherosclerotic stenosis. |
| 61624 | Percutaneous transluminal angioplasty, intracranial; with angiographic supervision and interpretation | Often reported for diagnostic angiography with separate supervision and interpretation when performed distinct from therapeutic angioplasty. |
| 36215 | Selective catheter placement, cerebral artery, with angiography, radiological supervision and interpretation | Used for selective catheterization and diagnostic angiography of cerebral vessels preceding or during angioplasty. |
| 75898 | Transcatheter therapy, embolization, or infusion procedure for brain, including angioplasty when performed adjunctively (unlisted/adjunct procedure codes may vary) | Used when a related transcatheter therapeutic procedure is performed in conjunction with angioplasty; verify payer policies. |
| 99144 | Moderate sedation services provided by the physician performing the procedure (example code — use payer guidance) | Report if moderate sedation is provided by the same physician and payer allows separate reporting; facility and payor rules vary. |