CCSD code A7310 – Biopsy of peripheral nerve

Key takeaways

CCSD code A7310 is the UK CCSD schedule code for biopsy of peripheral nerve, a diagnostic excision of a nerve segment for histopathology.

Insurers apply the CCSD schedule under their own policies, so confirm the patient’s insurer accepts A7310 before you request authorization.

UK private medical insurers such as Bupa, AXA Health, Aviva and Vitality expect pre-authorization before a planned nerve biopsy.

Histopathology is billed separately by the pathologist, so the surgical code covers the excision only.

Most denials trace back to a missing authorization number, an operative note that does not name the nerve, or a mismatched diagnosis.

CCSD code A7310: Definition and schedule position

CCSD code A7310 is the UK procedure code for biopsy of peripheral nerve. Its official descriptor is “Biopsy of peripheral nerve,” and it covers the surgical removal of a small nerve segment for laboratory diagnosis.

The code comes from the schedule maintained by the Clinical Coding & Schedule Development Group (CCSD). UK private medical insurers, including Bupa, AXA Health, Aviva, Vitality and WPA, use that schedule to recognize procedures for payment.

Each insurer applies the schedule under its own policy terms. Before you request authorization or raise an invoice, confirm that the patient’s insurer accepts A7310 for a peripheral nerve biopsy.

Within the schedule, A7310 sits in Chapter 3 (spine, spinal cord and peripheral nerves) under sub-chapter 3.6.0, Peripheral nerves. It is also cross-listed under 16.4.0, Nerves, and carries the legacy reference Fc.100. The CCSD codes hub lists the neighboring codes in the same chapter.

What a peripheral nerve biopsy involves

A peripheral nerve biopsy is a minor surgical procedure performed under local or general anesthesia. The sural nerve at the outer ankle is the site neurologists choose most often. It is a purely sensory nerve, it lies close to the surface, and the wound usually heals well.

The standard surgical steps run in this order:

1. Incision: The surgeon makes a short longitudinal incision over the target nerve, typically behind the lateral malleolus for sural nerve access.
2. Nerve exposure: Subcutaneous tissue is dissected to expose the nerve trunk while protecting the nearby vessels.
3. Segment excision: A short segment of nerve is removed by sharp dissection. Its length follows the pathologist’s protocol.
4. Hemostasis and closure: Bleeding is controlled, and the wound is closed in layers with sutures or staples.
5. Specimen handling: The segment is divided and placed in fixatives for routine histology and, where needed, electron microscopy.

The operative note should record each of these steps, name the nerve, and confirm the side and site. A note that says only “peripheral nerve” gives the insurer no way to check the claim against the descriptor.

Clinical indications for a peripheral nerve biopsy

Nerve biopsy is reserved for cases where nerve conduction studies (NCS), electromyography (EMG) and blood tests have not produced a diagnosis. Insurers review the indication closely, so the request should name the suspected condition. Accepted indications include:

• Vasculitic neuropathy, including mononeuritis multiplex, where histology can confirm inflammation of the vessel walls
• Amyloid neuropathy, where Congo red staining of the specimen confirms amyloid deposits
• Chronic inflammatory demyelinating polyneuropathy (CIDP) with an atypical presentation, where biopsy may show demyelination
• Sarcoid neuropathy, where the pathologist looks for non-caseating granulomas in the nerve
• Undiagnosed peripheral neuropathy after a full electrodiagnostic and metabolic workup

The clinical letter that supports the request should summarize the earlier investigations and explain why a biopsy is the next step. A letter that states only “peripheral neuropathy” is often sent back for more detail.

ICD-10 codes that support a nerve biopsy claim

UK insurers expect a diagnosis alongside the procedure code, recorded in the WHO ICD-10 classification. The table below lists diagnoses commonly paired with a peripheral nerve biopsy.

The diagnosis you submit must match the referral letter and the operative note. A pairing the clinical record cannot support is a common reason for an insurer query.

What A7310 includes and what it does not

The procedure code covers the surgeon’s work only. Other services on the same day are billed by the clinician who provides them, each under their own code.

If both legs are biopsied in one session, record each side clearly in the operative note. Ask the insurer how it wants a bilateral procedure invoiced before you submit the claim.

CCSD codes commonly confused with A7310

Several codes in the same CCSD sub-chapter describe surgery on a peripheral nerve. The deciding question is intent: A biopsy removes tissue to make a diagnosis, while the codes below treat a known problem. Descriptors are taken from the CCSD schedule.

An operative note that describes lesion removal points to A6110, or to A6180 when the lesion sits on a major nerve trunk.

Decompression without a specimen belongs under A6700 instead. The chart below maps each finding in the note to its code.

The CCSD Technical Guide explains how the schedule is structured. Check each code on this list against the current schedule before you use it.

Documentation requirements for A7310 claims

Insurers can ask for the operative note and clinical letters before they settle a surgical claim. Keep this minimum set on file for every peripheral nerve biopsy:

• Signed operative note naming the nerve, the side, the length of segment removed, and the approach
• Clinical letter stating the suspected diagnosis and the results of earlier NCS, EMG and blood tests
• Pathology request or report confirming that a tissue specimen reached the laboratory
• ICD-10 diagnosis that matches the clinical letter
• Pre-authorization number from the patient’s insurer, plus the procedure code the insurer approved

Paper notes make missing details harder to spot before the claim goes out. Digital clinical forms in Pabau, the practice management platform we build, can prompt the clinician to record each item at the point of care.

Pre-authorization: What UK insurers require for a nerve biopsy

UK private medical insurers generally require pre-authorization before planned surgery. Bupa, AXA Health, Aviva, Vitality and WPA each set their own process, and the rules vary by policy. The Bupa CCSD codes guide explains how Bupa handles code lookup. Check the patient’s policy before you book the procedure.

A typical authorization request for a peripheral nerve biopsy includes:

1. Specialist letter from the neurologist or surgeon, giving the suspected diagnosis and the reason for biopsy
2. Earlier results, including NCS and EMG reports and relevant blood tests
3. ICD-10 diagnosis that matches the clinical picture
4. CCSD procedure code A7310, confirmed with the insurer as the code it accepts for the biopsy
5. Consultant details, including the insurer’s provider number, the planned date, and the hospital

A procedure performed without authorization is at high risk of rejection. Record the authorization number in the patient file and quote it on the invoice.

Why A7310 claims are denied and how to prevent it

Denials for a peripheral nerve biopsy follow a small set of causes. Tracking them across your claims shows where the billing process keeps breaking down.

How Pabau supports accurate billing for CCSD code A7310

Many practices still raise surgical invoices by hand and chase insurers by email. Codes get keyed wrongly, authorization numbers get lost, and denials surface weeks later.

Pabau keeps the patient record, appointment and invoice in one place. You attach the procedure code to the service, link the diagnosis code, and record the authorization number on the invoice. If an insurer changes the code it accepts, you update it once on the service.

Pabau’s claims management software then tracks each claim from submission to payment. Your team can see which claims are outstanding and which were rejected, and resubmit without rebuilding the invoice.

Bill nerve biopsy claims with the right code

Pabau links procedure codes, diagnosis codes and authorization numbers to each invoice, then tracks the claim to payment. Your team spends less time chasing insurers.

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Conclusion

A CCSD code A7310 claim is settled long before the invoice goes out. Confirm that the patient’s insurer accepts the code, then secure authorization before the procedure is booked.

From there, the operative note carries the claim. A note that names the nerve and a diagnosis that matches the clinical letter leave the insurer little to query.

Book a demo to see how Pabau keeps procedure codes, authorization numbers and claims tracking in one place for your practice.

Continue your research

Need a full reference for Bupa CCSD billing? Bupa CCSD procedure codes guide covers how Bupa applies the CCSD schedule and handles code lookup.

Removing a lesion from a nerve instead? CCSD code A6110 covers excision of a lesion of peripheral nerve.

Operating on a major nerve trunk? CCSD code A6180 explains billing for excision of a lesion of major nerve.

Repairing an injured nerve? CCSD code A6400 covers peripheral nerve repair coding and common denials.

Treating a painful neuroma? CCSD code A6030 covers transection of a peripheral nerve for neuroma.

Frequently asked questions