CCSD code C1110 – Excision of lesion of canthus

Key takeaways

CCSD code C1110 covers surgical excision of a lesion at the canthal angle, and Bupa lists it in its MINOR 4 fee category.

The CCSD schedule uses one code for medial and lateral canthus excisions, so the operative note has to name the site.

Pre-authorisation is typically required by Bupa, AXA Health, Aviva, and Vitality, and cosmetic-appearing lesions need additional clinical justification.

Missing operative note detail and absent histology are the two most common reasons UK private insurers deny C1110 claims.

Practice management software like Pabau records, invoices, and submits the CCSD code your coder has selected. It doesn’t assign the code itself.

CCSD Code C1110: what the code covers

CCSD Code C1110 covers the surgical excision of a lesion at the canthus. The canthus is the angle where the upper and lower eyelid margins meet, at the inner (medial) or outer (lateral) corner of the eye. C1110 sits in the eye and orbital contents chapter of the CCSD codes schedule. Bupa lists it in its MINOR 4 fee category.

Use it only when the lesion is cut out. Removal by destruction, curettage, or laser ablation takes a different code.

The CCSD schedule separates C1110 from neighbouring eyelid excision codes. The canthus is anatomically and surgically distinct from the lid margin, conjunctival fornix, and periorbital skin. Before assigning this code, confirm the operative note names the canthal angle as the lesion site, not the lid margin.

Lesions commonly billed under C1110 include basal cell carcinoma (BCC), squamous cell carcinoma (SCC), sebaceous cysts, and papillomas. Chalazia at the canthal angle and melanocytic naevi are billed under it too. Whether the lesion is benign or malignant doesn’t change the code. It does change the documentation insurers expect and how closely they review the claim.

The procedure: what excision of a canthus lesion involves

Canthus lesion excision is usually performed under local anaesthesia. General anaesthesia may be used for anxious patients, children, or extensive lesions that need wide-margin clearance. The surgeon maps the lesion boundaries and plans the incision to protect canthal anatomy and lacrimal drainage. The lesion is then excised with a margin suited to the suspected histology.

Wound management after excision depends on defect size and location. Small defects at the lateral canthus often close primarily. Medial canthal defects are more surgically demanding because of proximity to the lacrimal canaliculi and the medial canthal tendon. Larger defects at either site may require local flap repair or skin grafting, which generates a separate reconstruction code.

The excised specimen should be sent for histopathological analysis in all cases where malignancy is clinically suspected. Most UK private insurers expect a histology request to accompany the operative note when the pre-operative diagnosis includes any malignant differential. Where malignancy isn’t a concern, histology may not be mandatory. Many practices still send every specimen as standard.

Benign vs malignant presentations

Benign lesions tend to involve straightforward excision with primary closure and shorter operative times. Malignant lesions, particularly BCC and SCC at the medial canthus, need wider margins and sometimes intraoperative margin assessment. They are also more likely to need staged reconstruction.

The billing code remains C1110 in either case. For a malignant excision, the operative note should document the suspected diagnosis, the excision margins taken, and specimen labelling. That detail stops the insurer classing the procedure as cosmetic.

Medial vs lateral canthus: does site affect billing?

No, the site doesn’t change the code. The current CCSD schedule uses a single C1110 code, with no published sub-codes for medial or lateral canthus excisions. The schedule is updated regularly, so check the latest CCSD technical guide to confirm this still holds. The table below shows where the two sites differ for documentation and insurer handling.

Related CCSD codes: avoiding common confusion

The canthus sits where several anatomical territories meet. Picking the wrong neighbouring code is one of the most common coding errors for this procedure. The Bupa fee schedule and the CCSD eye chapter both list eyelid, conjunctival, and canthal codes that look alike at first glance. The table below covers the codes most often confused with C1110.

The operative note is the audit trail for code selection. When the site is documented as “medial canthal area” or “outer canthal angle,” C1110 is defensible. When the note says “upper lid margin” or “lower lid skin,” a different code is more accurate. A C1110 claim on that note is likely to be queried. The three questions below follow the order a coder reads the note in.

Documentation requirements for C1110

Insurers audit C1110 claims against the operative note, and incomplete documentation is the fastest route to a rejected or delayed payment. Care Quality Commission standards set the baseline for clinical record content in England. UK private insurers add their own billing requirements on top, and record retention follows Information Commissioner’s Office guidance.

Every C1110 operative note must contain the following minimum content to support a successful claim:

• Lesion site: explicit anatomical location – medial or lateral canthal angle, left or right eye
• Lesion dimensions: clinical measurement of the lesion pre-excision (length x width in millimetres)
• Pre-operative diagnosis: clinical impression before excision (e.g. probable BCC, sebaceous cyst, papilloma)
• Excision technique: incision type, instruments used, margin taken in millimetres
• Wound closure: method used (primary closure, interrupted sutures, delayed closure, or referral for reconstruction)
• Post-operative diagnosis: updated clinical impression at time of closure if histology not yet returned
• Histology request: confirmation that the specimen was sent and to which laboratory, reference number where available
• Consent documentation: pre-operative consent note referencing the procedure and potential complications

A digital operative note template pre-loaded with C1110 fields makes an incomplete note far less likely. A CQC inspection checklist is a useful reference when you review whether those templates meet the standard. If you hold patient records electronically, confirm your retention and access controls meet UK GDPR.

Pre-authorisation: what UK private insurers require

Most UK private medical insurers require pre-authorisation for elective oculoplastic procedures, including canthus lesion excision, before they settle a C1110 claim. Requirements vary by insurer and change periodically, so verify them with the insurer before the procedure.

The following summarises typical pre-authorisation requirements across major UK private medical insurers for C1110. Insurer portals, including the Bupa code search portal and the Vitality fee finder, publish current guidance. Check the relevant one for each case.

• Bupa: pre-authorisation is required for all elective procedures. Send a GP or optometrist referral letter, the pre-operative diagnosis, and clinical justification that separates the excision from cosmetic treatment.
• AXA Health: pre-authorisation runs through the specialist forms portal. Cosmetic-appearing lesions need clinical photography or biopsy evidence supporting medical necessity.
• Aviva: pre-authorisation is required before treatment. Requirements vary by policy, so contact Aviva for case-specific guidance.
• Vitality Health: pre-authorisation runs through the provider portal. Diagnostic imaging or clinical notes must confirm the lesion isn’t primarily cosmetic.

Cosmetic presentations are the most common trigger for additional clinical justification. The insurer’s clinical team may class a visible canthal lesion as cosmetic if it causes no functional impairment. Functional impairment here means visual field restriction, epiphora, or recurrent infection. That can mean a refused claim even after pre-auth was granted.

Where functional impact exists, document it explicitly in the referral and the pre-auth request.

Why C1110 claims get denied

UK private insurers deny C1110 claims for six recurring reasons, from missing pre-authorisation to policy exclusions. Each one needs a different prevention step, set out in the table below.

Billing C1110 alongside reconstruction codes

When the canthal defect needs flap repair, Z-plasty, or skin grafting, a reconstruction code may be billed alongside C1110. Whether insurers accept it depends on the CCSD bundling rules, the insurer’s fee policy, and how well the operative note links the two procedures. The Healix fee schedule publishes explicit unbundling guidelines, which make a useful reference for how reconstruction is treated relative to excision.

The general principle within CCSD is that the excision code and the reconstruction code cover distinct surgical phases. C1110 covers the excision itself. A separate reconstruction code covers the wound repair when that repair goes beyond simple primary closure. Simple interrupted suture closure is typically considered part of C1110 and should not attract a separate reconstruction billing line.

For co-billing to be accepted, the operative note must:

• Narrate the excision and the reconstruction as distinct surgical steps
• Name the reconstruction technique used
• Record the defect dimensions that ruled out primary closure
• Note the time or complexity that separates the reconstruction from routine wound closure

Bundling interpretations vary, and some insurers want additional clinical justification for combined billing. Check the current CCSD technical guide and the insurer’s policy before submitting a reconstruction code with C1110.

Coding tips for oculoplastic and ophthalmic practices

Practices running high volumes of oculoplastic procedures under CCSD cut claim rejections by building coding checks into the clinical workflow. When coding is left as a post-procedure admin task, wrong-code errors only surface after submission.

Practical steps for oculoplastic coding teams:

• Template per code: build a procedure-specific operative note template for C1110 that pre-populates the minimum content fields. Surgeons fill in the clinical specifics, and the structure stops fields being skipped.
• Pre-auth timing: submit pre-authorisation requests at least five working days before the planned procedure date. Last-minute submissions increase the risk of proceeding without a reference number.
• Histology as default: send all canthus excision specimens for histopathological analysis, regardless of the pre-operative impression. A specimen submission costs far less than a denied claim or a missed malignancy.
• Insurer portal submission: use the insurer’s own electronic portal where available. Paper or email submissions take longer to process and are harder to track. Healthcode is the dominant electronic submission route for UK private healthcare invoicing.
• Internal audit cycle: review a sample of C1110 claims each quarter. Check pre-auth numbers, code accuracy, and operative note completeness before problems surface at insurer audit.

Keep your patient data handling up to date as well, because insurer audits increasingly ask for original clinical records alongside the claim.

How claims management software supports C1110 billing

Many oculoplastic practices still raise C1110 invoices by hand and re-key patient and insurer details into each Healthcode submission. Authorisation numbers get chased by email, and every re-keyed field is another chance of a rejection.

Pabau’s medical claims management keeps the patient’s insurer and policy on the patient record. Invoices route to the right insurer automatically, and the Healthcode submission arrives pre-filled. Insurers not on Healthcode get the claim by email from the same dashboard.

Before a claim goes out, Pabau checks that the membership number and authorisation code are in place. The Send button stays disabled until they are. Code selection stays with your coder, and Pabau carries the CCSD code they choose through to the invoice.

Each claim then moves through pending, submitted, processing, paid, or error, so your team can see which C1110 claims need attention today.

Send cleaner CCSD claims to UK insurers

Pabau carries the CCSD code your team selects onto the invoice, checks authorisation numbers before sending, and submits claims through Healthcode or by email.

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Conclusion

A C1110 claim is won or lost in the operative note. If the note names the canthal angle, measures the lesion, and logs the histology reference, the code holds up at audit.

The trade-off is a few extra minutes per note against weeks spent chasing a refused claim. Build the C1110 template once, secure the pre-auth number before booking the date, and audit a sample of notes each quarter.

Book a demo to see how Pabau keeps CCSD invoicing and Healthcode submission in one place for your oculoplastic practice.

Continue your research

Need a structured approach to CCSD procedure billing? Bupa procedure code fee schedule explains how Bupa’s fee schedule is structured across CCSD chapters and what practices need to know before submitting.

Looking up a different Bupa code? Bupa CCSD codes sets out how the codes are organised and where to find each one.

Treating the lacrimal system near the medial canthus? CCSD code C2640 covers incision of the lacrimal sac and the diagnosis code insurers expect alongside it.

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