CCSD code A2952 – Acoustic neuroma excision billing guide

Key takeaways

CCSD Code A2952 covers excision of acoustic neuroma (vestibular schwannoma) by a single surgeon where the tumour is less than 2.5 cm.

Tumour size and the surgical team decide the code. A2953 covers tumours more than 2.5 cm or compressing the brain stem, and A2954 covers a combined oto-neurosurgical team at any size.

A2952 is an unacceptable combination with both A2953 and A2954, so only one of the three codes is billed per tumour.

UK private insurers, including Bupa, AXA Health and Aviva, typically require pre-authorisation for this procedure, backed by a documented MRI measurement.

Pabau, the practice management platform we build, supports CCSD code entry, document attachment and insurer submission for A2952 claims.

What is CCSD Code A2952?

CCSD Code A2952 is a neurosurgery procedure code within the Clinical Coding and Schedule Development (CCSD) schedule. It covers excision of an acoustic neuroma (vestibular schwannoma) less than 2.5 cm, performed by a single surgeon. The code sits under the Nerves heading in chapter 2 of the schedule, which covers the brain, cranium and other intracranial organs.

UK private medical insurers, including Bupa, AXA Health, Aviva, Vitality and WPA, use the CCSD schedule to process surgical claims.

Three qualifiers define A2952, and all three must be present for the code to apply:

• Procedure type: open surgical excision of an acoustic neuroma. Stereotactic radiosurgery (Gamma Knife, CyberKnife) and watchful waiting do not qualify.
• Tumour size: less than 2.5 cm in greatest dimension, as measured on pre-operative gadolinium-enhanced MRI, with no compression of the brain stem. A tumour compressing the brain stem is coded A2953, even below 2.5 cm.
• Surgical team: a single surgeon. The descriptor names no specialty, so one otologist or one neurosurgeon both qualify. When a combined oto-neurosurgical team operates, the code is A2954 instead.

Acoustic neuroma is a benign tumour of the vestibular branch of the eighth cranial nerve. It grows within the internal auditory canal (IAC) and may extend into the cerebellopontine angle (CPA) cistern. Despite the name, acoustic neuroma is correctly called a vestibular schwannoma in contemporary clinical and pathological terminology. Both terms appear in private insurer correspondence and operative notes. Either is acceptable, provided the histopathology report confirms the diagnosis.

The procedure: acoustic neuroma excision explained

Acoustic neuroma excision is a posterior fossa craniotomy performed under general anaesthesia. The goal is to remove the tumour while preserving the facial nerve and, where possible, residual hearing. The tumour arises from Schwann cells on the vestibular nerve within the IAC and expands into the CPA cistern. Pre-operative gadolinium-enhanced MRI shows tumour size, extension, and proximity to the facial nerve. That MRI report is the document that establishes whether A2952 or A2953 applies.

Surgical approaches covered under A2952

Three surgical approaches are used for acoustic neuroma excision. A2952 covers the excision regardless of which approach the surgeon selects; the approach does not change the code.

Intraoperative facial nerve monitoring using continuous electromyography (EMG) is standard practice during acoustic neuroma excision. Whether intraoperative neurophysiological monitoring (IONM) is separately billable alongside A2952 depends on each insurer’s schedule. Confirm with the individual insurer before assuming separate reimbursement.

A2952 vs A2953 vs A2954: choosing the correct code

The CCSD schedule splits acoustic neuroma excision into three codes. Tumour size and brain stem involvement separate A2952 from A2953. A combined oto-neurosurgical team moves the case to A2954, whatever the tumour size.

The CCSD schedule has listed A2952 and A2954 as an unacceptable combination since 6 August 2014, so a joint operation is never billed under A2952. The schedule also lists A2952 and A2953 as an unacceptable combination, so only one of the three codes is billed per tumour. Before surgery, confirm with the insurer how each member of a combined team invoices under A2954.

Tumour size comes from the documented MRI measurement, not from the intraoperative impression. The tumour may look larger or smaller once exposed surgically. The pre-operative MRI measurement governs code selection, and the operative note must record it.

Taken in order, three questions settle the code, and the first one that applies decides it.

Other related CCSD codes to know

Several codes in the wider CCSD code library may accompany or be confused with A2952. Knowing which are separately billable and which are bundled prevents both underbilling and overbilling. A lesion of a different cranial nerve is coded A2900 instead, the general intracranial cranial nerve excision code.

The Bupa CCSD procedure code guide includes neurosurgery chapter codes and Bupa’s specific fee schedules. Cross-reference this alongside your insurer’s schedule when building a claim bundle.

Documentation requirements for A2952 claims

UK private insurers will not pay an A2952 claim without a complete clinical record. Missing a single document is enough to trigger a query or outright rejection. Use the following checklist when preparing each submission.

• Pre-operative gadolinium-enhanced MRI report: must state tumour dimensions (maximum diameter in cm), confirm location in the IAC or CPA, and note any brain stem compression. This is the document that supports the choice between A2952 and A2953.
• Operative note: must record the surgical approach (retrosigmoid, translabyrinthine, or middle fossa) and state the pre-operative MRI tumour size. It must also confirm that a single surgeon performed the excision, since a combined team is coded A2954. Intraoperative findings alone are insufficient.
• Histopathology report: must confirm the diagnosis as vestibular schwannoma. Some insurers will not pay without histological confirmation, particularly on initial claims or where the diagnosis was uncertain pre-operatively.
• Intraoperative monitoring record: a record from the IONM neurophysiologist documenting facial nerve EMG monitoring throughout the procedure. Check whether the insurer asks for it before you submit.
• Post-operative facial nerve grading: document facial function using the House-Brackmann grading scale at the first post-operative review. Some insurers include this in outcome reporting requirements for neurosurgical claims.
• Pre-authorisation reference number: if pre-authorisation was obtained (see the next section), include the authorisation number on the invoice. Claims submitted without this number where pre-auth was required will be rejected.

Structured clinical documentation at each stage of the patient pathway makes claim submission faster and appeals easier to prepare. With each document above captured at the point of care, the billing team does not need to chase the surgical team retrospectively.

Pre-authorisation: what insurers require before surgery

Most UK private insurers require pre-authorisation before they will fund acoustic neuroma excision. Proceeding without it risks the entire claim being declined regardless of clinical necessity. While requirements vary by insurer and policy year, the following reflects standard practice for major payers.

1. Consultant referral letter: the treating neurosurgeon or ENT consultant writes to the insurer confirming the diagnosis, MRI findings and tumour size. The letter explains why surgery was chosen over watchful waiting or radiosurgery.
2. MRI report submission: the insurer’s medical assessor typically requires the gadolinium-enhanced MRI report showing the measured tumour size. Without it, the assessor cannot confirm the sub-2.5 cm threshold or rule out brain stem compression, which would make A2953 the correct code.
3. Proposed procedure code notification: notify the insurer that the planned procedure will be billed under CCSD Code A2952. Some insurers also ask for the proposed surgical approach and surgeon details at this stage. If a combined oto-neurosurgical team will operate, say so, because the code becomes A2954.
4. Policy eligibility check: confirm that the patient’s policy covers neurosurgery. Check that it does not exclude pre-existing conditions linked to the tumour, such as longstanding hearing loss or tinnitus.

Bupa’s code search portal allows practices to look up procedure codes and check current authorisation requirements online. AXA Health’s specialist forms portal provides AXA’s procedure fee chapters and authorisation submission routes. Aviva’s fee schedule covers CCSD-coded procedures and their specific pre-authorisation requirements. Always verify with the specific insurer for the policy year in question, as requirements change annually.

If surgery proceeds without pre-authorisation where the insurer requires it, the insurer may decline the claim entirely. In that scenario, the patient becomes personally liable, which creates a significant financial and relationship risk for the practice.

Common reasons A2952 claims are denied

Acoustic neuroma excision claims draw insurer queries because the code qualifiers are specific and the documentation requirements are extensive. These are the denial triggers to guard against.

• Wrong code submitted: A2952 used for a tumour more than 2.5 cm or one compressing the brain stem (A2953), or for a combined-team operation (A2954). The reverse error, A2953 for a small uncomplicated tumour, is queried too.
• Tumour size not documented: the operative note does not state the pre-operative MRI measurement. The insurer’s assessor cannot verify the sub-2.5 cm qualifier from operative findings alone.
• Unacceptable combination: A2952 billed alongside A2953 or A2954. The CCSD schedule lists both pairs as unacceptable combinations, so one of the lines will be refused.
• Pre-authorisation not obtained: the insurer required pre-auth but no reference number appears on the claim. The insurer may decline the claim outright.
• Missing histopathology: the insurer requires pathological confirmation of vestibular schwannoma, particularly for complex or unusual presentations. A claim submitted before the histopathology result is available will often be queried.
• IONM record absent: where the insurer expects evidence of intraoperative facial nerve monitoring, a missing monitoring record leads to a query or reduced payment.
• Bundling error with anaesthesia: anaesthesia fees included in the surgical claim rather than billed separately by the anaesthetist. UK private insurers process surgical and anaesthetic fees through separate claim streams.

How to appeal a denied A2952 claim

A denied A2952 claim can usually be appealed. The appeal window varies by insurer, so check the deadline in the denial letter and start the appeal straight away.

1. Request the denial reason in writing: insurers are required to provide a specific reason. Vague responses (“not clinically necessary”) can themselves be challenged.
2. Assemble the complete clinical file: pre-operative MRI report with measurements, operative note, histopathology report, IONM record, and any post-operative facial nerve grading documentation.
3. Draft a letter of medical necessity: the operating surgeon should confirm in writing that open excision under A2952 suited this tumour size and presentation. The letter should also record why radiosurgery and watchful waiting were considered and ruled out.
4. Reference the CCSD schedule descriptor: cite the official CCSD Code A2952 descriptor verbatim in the appeal letter to show that the claim meets each qualifier. This removes any ambiguity about whether the code was correctly applied.
5. Submit to the insurer’s medical review team: Bupa, AXA Health, and Aviva each have a medical advisory function that reviews disputed claims. Ask for referral to medical review if the initial assessor’s response is unsatisfactory.

Billing A2952 in Pabau

Pabau, the practice management platform we build, includes private practice claims software. It lets UK practices enter CCSD codes, attach clinical documents and submit claims to insurers without switching between systems. For an A2952 claim, the workflow follows the same sequence as the documentation checklist above.

1. Create the treatment record: open the patient’s file after surgery and add the procedure using the CCSD code entry field. Enter A2952 with the pre-operative MRI tumour measurement noted in the record.
2. Attach supporting documents: upload the MRI report, operative note, and histopathology report directly to the patient record. Pabau’s digital forms and document attachment tools keep these to hand for later reference.
3. Record the pre-authorisation number: enter the insurer’s authorisation reference in the billing record before submission.
4. Submit to the insurer: generate the invoice for the insurer with the CCSD code and authorisation number populated. Track claim status within the platform.
5. Handle rejections: Pabau’s billing notes let the team record the denial reason and the appeal correspondence. The claim can then be resubmitted with supplementary evidence attached.

With a structured claims workflow, the code, the MRI report and the appeal trail sit in one patient record. The billing team can then answer an insurer query without going back to the surgical team.

Manage CCSD billing for neurosurgery from one place

Pabau helps UK private practices enter CCSD codes, attach supporting documents, and submit claims to insurers without leaving the platform. Book a demo to see how the claims workflow handles complex neurosurgery cases.

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Conclusion

The code for acoustic neuroma excision is settled before the operation, not after it. Agree A2952 with the insurer at pre-authorisation, on the strength of the radiologist’s measurement and a named single surgeon. If the plan changes to a joint team, or the scan shows brain stem contact, re-authorise under the right code before surgery.

That front-loads the paperwork, but it leaves the assessor little to query once the claim arrives. Pabau keeps the MRI report, operative note and authorisation reference on one patient record, so the claim goes out complete. Book a demo to see how Pabau handles CCSD claims for complex neurosurgery.

Continue your research

Need a structured overview of CCSD billing for Bupa claims? Bupa CCSD procedure codes and billing guide covers the Bupa schedule structure, code lookup and invoicing requirements for UK private practice.

Operating on a larger tumour or one pressing on the brain stem? CCSD Code A2953 explains the single-surgeon code for tumours over 2.5 cm or compressing the brain stem.

Excising a lesion of another cranial nerve? CCSD Code A2900 covers the general code for intracranial cranial nerve lesion excision.

Billing a cranial nerve decompression instead? CCSD Code A3200 walks through coding and documentation for decompression of a cranial nerve by craniotomy.

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