CCSD code L3400 – Open cerebral artery surgery

Key takeaways

CCSD code L3400 covers open operations on a cerebral artery, such as bypass, reconstruction or open embolectomy, performed through a craniotomy.

Aneurysm clipping (L3320), aneurysm reinforcement (L3380) and brain AVM excision (A0260) have their own CCSD codes, so they are not billed as L3400.

Endovascular work, such as coiling, stenting or flow diversion, is catheter-based and is billed under other CCSD codes.

UK private medical insurers such as Bupa, AXA Health, Aviva and Vitality commonly require pre-authorisation before a planned L3400 procedure.

Pabau, the practice software we build, sends CCSD invoices through Healthcode and tracks their status, using the codes your team records.

CCSD code L3400: Definition and clinical scope

CCSD code L3400 is the UK private-insurer code for open operations on cerebral artery. It covers surgery on an intracranial artery that the neurosurgeon reaches directly through a craniotomy. For example, it applies to a cerebral bypass, an arterial reconstruction or an open embolectomy.

OPCS-4, the NHS procedure classification, has a similar category, L34, for other open operations on cerebral artery. It covers reconstruction, anastomosis, open embolectomy and open embolisation. However, CCSD is a separate schedule, so read that category as a guide to scope and confirm it in the L3400 entry.

CCSD has no CPT-style modifiers or sub-codes for side or vessel. Instead, the operative note and the ICD-10 code carry those details. In addition, nearby brain and cranium procedures each have their own entry among our private practice CCSD codes.

Procedures billed under L3400

The descriptor is broad, but its scope is narrower than it looks. Aneurysm surgery and AVM excision sit under their own codes, so L3400 is left with the remaining open arterial work.

• Cerebral bypass (anastomosis): the surgeon joins a donor artery to an intracranial artery to restore flow. For example, a superficial temporal artery to middle cerebral artery bypass is a frequent case.
• Reconstruction of a cerebral artery: the surgeon repairs or rebuilds a damaged segment of the vessel wall.
• Open embolectomy or thrombectomy: the surgeon opens the artery and removes a clot directly. In contrast, catheter-based thrombectomy is a different procedure with its own code.
• Open embolisation: the surgeon occludes a cerebral artery from inside the open operative field rather than through a catheter.

Bypass for moyamoya disease or a symptomatic arterial occlusion is the case billing teams meet most. Finally, check the exact wording and any notes in the CCSD schedule or your insurer’s code search before you invoice.

Key steps documented in the operative report

1. Craniotomy approach: type and side of the bone flap.
2. Arterial target: the named vessel and segment, for example the middle cerebral artery.
3. Operation performed: bypass, reconstruction, embolectomy or embolisation, stated in plain terms.
4. Donor vessel or graft: for a bypass, the donor artery or graft and the anastomosis.
5. Result: flow confirmation, haemostasis and the closure.

What L3400 does not cover

The word “open” is the first filter, and the more specific codes are the second. Each procedure below has its own CCSD entry, so billing it as L3400 is a coding error.

• Aneurysm clipping: clipping of a cerebral artery aneurysm is L3320.
• Aneurysm reinforcement: wrapping an aneurysm that cannot be clipped is CCSD code L3380.
• Brain AVM excision: open removal of an arteriovenous malformation is CCSD code A0260.
• Endovascular treatment: coiling, stenting, flow diversion and catheter thrombectomy are billed under the schedule’s endovascular codes.
• Carotid surgery in the neck: carotid endarterectomy treats the extracranial carotid artery, not a cerebral artery, and is coded separately.
• Stereotactic radiosurgery: a radiation treatment with no open vascular access.

Insurers check the operative note against the code. For instance, a note that describes catheter access, clip placement or AVM removal will not support an L3400 claim. To show this, the diagram below runs those two checks in order, access route first.

ICD-10 diagnosis codes used with L3400

Every L3400 claim needs a paired ICD-10 diagnosis code, and UK private insurers use WHO ICD-10. Check each descriptor in the WHO ICD-10 browser. Otherwise, insurers may query a claim where the diagnosis does not support the procedure.

Q28.2, arteriovenous malformation of cerebral vessels, belongs with A0260 rather than L3400. As a result, pairing L3400 with an AVM code tells the insurer the diagnosis and the procedure disagree. In general, use the most specific code the notes support, because unspecified codes draw closer review.

Related CCSD codes and how they differ from L3400

Section 2.5 of the CCSD schedule groups L3400 with the other open procedures on brain vessels. In addition, the Bupa CCSD codes guide explains how CCSD codes work and how to look them up.

The CCSD schedule lists unacceptable combinations for each code. Therefore, check the L3400 entry before you add craniotomy, dural repair or other vascular lines to the same claim. However, where two separate procedures happen in one session, ask the insurer at pre-authorisation how it wants them claimed.

Pre-authorisation for CCSD code L3400 with UK private insurers

UK private medical insurers commonly require pre-authorisation before a planned L3400 procedure. That includes Bupa, AXA Health, Vitality, Aviva and WPA. However, policies differ by insurer and by the patient’s cover, so check the policy before booking theatre.

The pre-authorisation request for L3400 generally includes these items:

1. Supporting letter: the neurosurgeon names the procedure, the target artery and the indication. The letter also explains why open surgery suits this patient.
2. Imaging reports: CT angiography, MR angiography or digital subtraction angiography (DSA) confirming the vascular problem.
3. Procedure and diagnosis codes: L3400 with the ICD-10 code you intend to claim.
4. Hospital admission: the hospital stay and any critical care are authorised and invoiced by the hospital, not by the surgeon.
5. Written authorisation: record the authorisation number and the approved procedure codes before theatre.

Keep each authorisation number on the patient record next to the theatre booking, so the invoice can carry it. For more detail, our medical billing compliance guide covers the documentation standards that reduce claim risk.

Documentation requirements to support an L3400 claim

UK private insurers may ask for the operative note to validate an L3400 claim, especially given its value. Therefore, have full records ready before you submit the invoice, and keep them for insurer audit.

• Patient details and the date of surgery.
• Pre-operative diagnosis with the affected artery named, for example a left middle cerebral artery occlusion.
• Procedure performed: the specific open operation, such as a superficial temporal artery to middle cerebral artery bypass.
• Craniotomy approach: type, side and exposure technique.
• Donor vessel, graft or material: what was used and where it was joined or placed.
• Imaging: the angiography findings that guided the operation.
• Result: flow confirmation, haemostasis and the immediate neurological observations.
• Surgeon sign-off with the consultant’s name and GMC number.
• Authorisation number from the patient’s insurer.

Patient records that hold this detail are health data under UK GDPR and the Data Protection Act 2018. As a result, store them securely and share them with the insurer only for the claim.

Anaesthetist, hospital and imaging charges alongside L3400

UK insurer fee schedules list a specialist fee and a separate anaesthetist fee against each CCSD code. The consultant anaesthetist invoices the insurer for L3400 under their own name and provider number. As a result, the neurosurgeon does not include the anaesthetic on their invoice.

• Anaesthetist: invoices separately against the same CCSD code, under the anaesthetist fee in the insurer’s schedule.
• Hospital: invoices theatre, ward and critical care stays under its own agreement with the insurer.
• Imaging and neuromonitoring: angiography and monitoring during surgery are billed by their own providers. Check with the insurer whether it accepts them separately.

Why L3400 claims get declined and how to fix them

Most declined L3400 claims trace back to a small set of avoidable problems, each with a fix to make before you resubmit. Claims management software that keeps codes and authorisation numbers on the patient record makes each check quicker.

How Pabau keeps L3400 claims and authorisations on one record

Billing teams for neurosurgery often keep the authorisation letter, the operative note and the invoice in separate places. When one reference goes missing, the claim stalls while someone chases it.

In Pabau, the codes, authorisation number and documents your team records sit on the patient’s record. Its claims management sends the invoice to the insurer through Healthcode and shows each claim’s status, so a declined claim surfaces quickly.

Pabau does not choose codes or obtain authorisations. Instead, your neurosurgeon and billing team make those decisions, and Pabau carries their work through to a submitted, tracked claim.

Keep CCSD claims and their paperwork together

Pabau sends CCSD invoices to UK private insurers through Healthcode and tracks their status. Codes, authorisation numbers and operative notes stay on one patient record, so billing staff spend less time chasing missing details.

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Conclusion

CCSD code L3400 is the code for open arterial surgery that no more specific code describes. Bypass, reconstruction and open clot removal belong here, while clips, wraps and AVM excisions do not.

Get the code choice right from the operative note, pair it with the diagnosis that justified the surgery, and keep unacceptable combinations off the claim. Then make sure the authorisation number travels with the invoice.

Those checks take minutes before submission, while a declined high-value claim can take weeks to reverse. Book a demo to see how Pabau keeps CCSD codes, authorisation numbers and claim follow-up on one patient record.

Continue your research

Billing Bupa patients for neurosurgery? Bupa CCSD codes and fee schedule guide walks through how CCSD procedure codes are structured and submitted to Bupa.

Wrapping an aneurysm instead? CCSD code L3380 covers reinforcement of an aneurysm of a cerebral artery.

Removing a brain AVM? CCSD code A0260 covers open excision of an arteriovenous malformation, one of the codes never billed alongside L3400.

Returning to theatre after a craniotomy bleed? CCSD code A4080 covers craniotomy for post-operative haemorrhage.

Frequently asked questions