Aetna modified CPB 1039 for venous stenting in idiopathic intracranial hypertension, effective January 15, 2026. Here's what billing teams need to know before submitting claims.
Aetna, a CVS Health company, updated its Aetna venous sinus stenting coverage policy under CPB 1039 Aetna system, formalizing an 11-point medical necessity framework for CPT 61635 (transcatheter intracranial stent placement). The policy also explicitly blocks reimbursement for intravascular ultrasound under CPT 37252 and 37253 when used for candidate selection in this procedure. If your team handles neurology, interventional radiology, or neurosurgery billing, this policy change has direct financial exposure.
Quick-Reference Table
| Field | Detail |
|---|---|
| Payer | Aetna |
| Policy | Venous Stenting for the Treatment of Idiopathic Intracranial Hypertension |
| Policy Code | CPB 1039 |
| Change Type | Modified |
| Effective Date | January 15, 2026 |
| Impact Level | High |
| Specialties Affected | Interventional Neurology, Interventional Radiology, Neurosurgery, Ophthalmology, Neurology |
| Key Action | Audit prior authorization documentation against all 11 medical necessity criteria before submitting claims for CPT 61635 |
Aetna Venous Sinus Stenting Coverage Criteria and Medical Necessity Requirements 2026
The real issue here is that Aetna now requires 11 distinct criteria to establish medical necessity for venous stent placement in the transverse sinus. Miss one, and you're looking at a claim denial. This isn't a simple checklist — it's a gauntlet.
The procedure is covered under CPT 61635 only for patients with medically refractory idiopathic intracranial hypertension (IIH), also called pseudotumor cerebri. Every criterion below must be documented in the patient record before you submit.
The 11 medical necessity criteria are:
| # | Covered Indication |
|---|---|
| 1 | Ophthalmologic evaluation documents vision loss (visual fields or acuity) and papilledema — CPT 92081, 92082, or 92083 for visual fields, and CPT 92202 for ophthalmoscopy. |
| 2 | Complete neurologic examination shows no focal neurologic deficit, except vision loss and cranial nerve VI palsy. |
| 3 | Neuroimaging excludes intracranial mass, infection, hydrocephalus, structural defects, and venous sinus thrombosis. MRI with and without contrast (CPT 70551–70553) is first-line. CT (CPT 70450, 70460, or 70470) is acceptable only if MRI is contraindicated. |
| 4 | Lumbar puncture documents intracranial pressure (ICP) at or above 25 cm water CSF. The LP must have been performed in the lateral decubitus position within the past three months. Use CPT 62270 or 62328 (with fluoroscopic or CT guidance) to bill the procedure. |
| 5 | CSF analysis is normal — no pleocytosis, elevated protein, hypoglycorrhachia, abnormal cytology, or signs of infection or malignancy. Lab codes include CPT 84157 (total protein), 89050/89051 (cell count), and 83873 (myelin basic protein). |
| 6 | Normal CBC, electrolytes, and PT/PTT are on file. These rule out anemia and hypercoagulable states. Bill CPT 85025 or 85027 (CBC), 85610 (prothrombin time), and 85730 (PTT). Electrolytes include CPT 84132 (potassium), 84295 (sodium), 82435 (chloride), and 82374 (CO2/bicarbonate). |
| 7 | Blood pressure is below 150 mmHg systolic, excluding hypertensive encephalopathy. |
| 8 | The following conditions have been excluded: obstructive sleep apnea, systemic lupus erythematosus, vasculitis, lead poisoning, and neurosarcoidosis. |
| 9 | Magnetic resonance venography (MRV) — CPT 70544, 70545, or 70546 — documents bilateral focal transverse sinus stenosis, or unilateral stenosis with contralateral hypoplasia. |
| 10 | Failure of maximal medical management and CSF shunting is documented. This is your exhaustion-of-alternatives requirement, and it's non-negotiable. |
| 11 | A pressure gradient greater than 8 mmHg across the stenosis must be documented during venography. Aetna does not require this for prior authorization if criteria 1–10 are met — but it must be documented during the procedure itself before stent placement. |
That last point matters for your prior authorization workflow. You can get the PA approved without criterion 11 on file. But if the venographer doesn't document the pressure gradient during the procedure, you've got a coverage policy compliance problem after the fact.
The ICD-10-CM diagnosis code for this procedure is G93.2 (Benign intracranial hypertension — refractory, idiopathic). Make sure this is the primary diagnosis on your claim.
Aetna Venous Sinus Stenting Exclusions and Non-Covered Indications
Aetna draws a hard line on intravascular ultrasound (IVUS) when used for candidate selection in venous sinus stenting. CPT 37252 (IVUS, noncoronary vessel, primary) and CPT 37253 (each additional vessel, add-on) are explicitly not covered for this indication.
The reason Aetna gives: effectiveness of IVUS for optimizing candidate selection in this procedure has not been established. That's the experimental, investigational, or unproven designation — and it means no reimbursement, full stop.
If your interventional team uses IVUS as part of the pre-stent workup, don't bill it to Aetna under this indication. The denial will come, and appeals on experimental designations are a steep climb. If you believe IVUS is clinically necessary for a specific patient, loop in your compliance officer before submitting.
Coverage Indications at a Glance
| Indication | Status | Relevant Codes | Notes |
|---|---|---|---|
| Venous stent placement in transverse sinus for refractory IIH — all 11 criteria met | Covered | CPT 61635; HCPCS C1874–C1877, C2617, C2625, S1091 | Prior authorization required; pressure gradient (criterion 11) not required for PA but must be documented during procedure |
| Intravascular ultrasound for candidate selection in venous sinus stenting | Not Covered (Experimental) | CPT 37252, 37253 | Designated experimental/investigational; effectiveness not established |
| Diagnostic lumbar puncture to document ICP elevation | Related/Supporting | CPT 62270, 62328 | Must show ICP ≥ 25 cm H₂O in lateral decubitus position within prior three months |
| MRI brain and MR venography for stenosis documentation | Related/Supporting | CPT 70551–70553, 70544–70546 | MRV must confirm bilateral or unilateral stenosis with contralateral hypoplasia |
| CT head (MRI contraindicated) | Related/Supporting | CPT 70450, 70460, 70470 | Only covered as MRI substitute — not as add-on |
| Visual field testing and ophthalmoscopy for papilledema/vision loss | Related/Supporting | CPT 92081, 92082, 92083, 92202 | Required as part of ophthalmologic evaluation criterion |
| CBC, coagulation studies, electrolytes | Related/Supporting | CPT 85025, 85027, 85610, 85730, 84132, 84295, 82435, 82374 | Must document normal values; rules out anemia and hypercoagulable state |
| CSF laboratory analysis | Related/Supporting | CPT 84157, 89050, 89051, 83873, 84166, 86325, 86335 | Must be normal — any pleocytosis, elevated protein, or abnormal cytology disqualifies |
| Venography with pressure gradient measurement | Related/Supporting | CPT 75860, 75870 | Required during procedure; gradient > 8 mmHg across stenosis must be documented |
Aetna Venous Sinus Stenting Billing Guidelines and Action Items 2026
This policy has a long documentation trail. Venous sinus stenting billing under CPT 61635 will fail without a complete pre-procedure record. Here's what to do before January 15, 2026.
| # | Action Item |
|---|---|
| 1 | Build a documentation checklist for all 11 criteria. Give it to your neurology and interventional radiology teams now. Every criterion needs a corresponding note, report, or lab result in the chart. If even one is missing, prior authorization will stall and the claim will deny. |
| 2 | Separate the PA workflow from the procedure-day documentation. Aetna does not require criterion 11 (pressure gradient > 8 mmHg) for prior authorization. But your interventional team must document it during venography before placing the stent. Set up a procedure-day checklist that flags this specifically. |
| 3 | Stop billing CPT 37252 and 37253 for this indication. If your team uses IVUS during venous sinus stenting candidate evaluation, those codes will not be reimbursed by Aetna. Remove them from any procedure bundles or charge capture templates tied to IIH stenting. Do this before the effective date of January 15, 2026. |
| 4 | Confirm your stent HCPCS codes match what you're implanting. Aetna covers HCPCS C1874 (coated/covered stent with delivery system), C1875 (coated/covered without delivery system), C1876 (non-coated with delivery system), C1877 (non-coated without delivery system), C2617 (temporary non-coronary without delivery system), C2625 (temporary non-coronary with delivery system), and S1091 (non-coronary temporary with delivery system, Propel). Match the HCPCS code to the specific device used — this is a common source of claim denial on device-intensive procedures. |
| 5 | Verify the G93.2 ICD-10-CM code is your primary diagnosis. G93.2 (Benign intracranial hypertension, refractory, idiopathic) is the covered diagnosis. Anything else in the primary position on the claim creates a mismatch that triggers denial. |
| 6 | Audit your failure-of-alternative-treatments documentation. Criterion 10 requires documented failure of both maximal medical management and CSF shunting. "Attempted" doesn't cut it — the record needs to show what was tried, for how long, and why it failed. Talk to your medical director about standardizing this language in the procedure note template. |
| 7 | Flag complex cases for your compliance officer. If a patient meets nine of the 11 criteria but has a borderline finding on one — say, a blood pressure reading above 150 mmHg systolic, or an equivocal MRV — don't guess. Talk to your compliance officer before submitting a prior authorization request. A denied PA is recoverable. A submitted claim with missing criteria documentation is a different problem. |
| Previous Version | Current Version |
|---|---|
| Coverage is considered experimental and investigational for all indications | Coverage is considered medically necessary when specific criteria are met |
| Prior authorization is not required | Prior authorization is required for initial treatment |
| Documentation must include clinical history | Documentation must include clinical history |
| Re-review every 24 months | Re-review every 12 months with updated clinical documentation |
CPT, HCPCS, and ICD-10 Codes for Venous Sinus Stenting Under CPB 1039
Covered CPT Codes (When Selection Criteria Are Met)
| Code | Type | Description |
|---|---|---|
| 61635 | CPT | Transcatheter placement of intravascular stent(s), intracranial (e.g., atherosclerotic stenosis), including balloon angioplasty |
Covered HCPCS Codes (When Selection Criteria Are Met)
| Code | Type | Description |
|---|---|---|
| C1874 | HCPCS | Stent, coated/covered, with delivery system |
| C1875 | HCPCS | Stent, coated/covered, without delivery system |
| C1876 | HCPCS | Stent, non-coated/non-covered, with delivery system |
| C1877 | HCPCS | Stent, non-coated/non-covered, without delivery system |
| C1885 | HCPCS | Catheter, transluminal angioplasty, laser |
| C2617 | HCPCS | Stent, non-coronary, temporary, without delivery system |
| C2625 | HCPCS | Stent, non-coronary, temporary, with delivery system |
| S1091 | HCPCS | Stent, non-coronary, temporary, with delivery system (Propel) |
Not Covered / Experimental Codes
| Code | Type | Description | Reason |
|---|---|---|---|
| 37252 | CPT | Intravascular ultrasound (noncoronary vessel) during diagnostic evaluation and/or therapeutic intervention | Experimental/investigational for candidate selection in venous sinus stenting |
| 37253 | CPT | Each additional noncoronary vessel (add-on) | Experimental/investigational for candidate selection in venous sinus stenting |
Key ICD-10-CM Diagnosis Code
| Code | Description |
|---|---|
| G93.2 | Benign intracranial hypertension (refractory, idiopathic) |
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