CCSD code E1220 – Caldwell-Luc procedure billing guide

Key takeaways

CCSD Code E1220 covers the Caldwell-Luc procedure, an open approach to the maxillary sinus through the canine fossa.

E1220 is graded Intermediate in section 5.5 Nasal sinuses of Chapter 5 (Ear, nose and throat), not Major.

Its closest neighbours are E1310 antral washout, E1330 intranasal antrostomy, E1350 oro-antral fistula closure and the two FESS codes, E1260 (image-guided) and E1432.

The operative note must record the sublabial incision and canine fossa bone window, because that open access is what separates E1220 from its neighbours.

Claims management software helps practices attach the operative note and authorisation number to the treatment record before the claim goes out.

CCSD Code E1220: definition and clinical descriptor

CCSD Code E1220 is the procedure code for the Caldwell-Luc procedure, also called a radical antrostomy. It is set by the Clinical Coding & Schedule Development Group (CCSD), the body behind the procedure codes that UK private medical insurers use.

CCSD members include Bupa, AXA Health, Aviva and Vitality, and most other UK insurers bill against the same schedule. E1220 sits in Chapter 5 (Ear, nose and throat), section 5.5 Nasal sinuses, and is graded Intermediate. Billing guides for the other CCSD codes follow the same format.

The descriptor is narrow. E1220 covers the open Caldwell-Luc approach only. Antral washout, intranasal antrostomy, flap closure of an oro-antral fistula and endoscopic sinus surgery each have their own section 5.5 code.

What the Caldwell-Luc procedure involves

The Caldwell-Luc procedure opens the maxillary sinus through an incision in the upper buccal sulcus. The surgeon then enters the sinus through a bone window in the canine fossa of the anterior maxillary wall.

ENT surgeons and oral and maxillofacial surgeons both perform it, usually under general anaesthetic. When a consultant anaesthetist is involved, they bill separately under the same code against the schedule’s anaesthetist fee.

The operative sequence typically follows these steps:

1. Sublabial incision: a horizontal incision in the mucosa of the upper buccal sulcus, above the roots of the upper canine and premolars.
2. Canine fossa access: a bone window is opened through the anterior maxillary wall to enter the maxillary antrum.
3. Sinus exploration and clearance: diseased mucosa, polyps, cysts or foreign material are inspected and removed as clinically indicated.
4. Inferior meatal window: a nasal antrostomy into the inferior meatus may be created to drain and ventilate the sinus.
5. Wound closure: the sublabial incision is closed with absorbable sutures, so no facial scar results.

Record each step in the operative note. A note that reads only “Caldwell-Luc performed” leaves the insurer unable to check the code.

Clinical indications for E1220

Insurers look for clinical necessity in the pre-operative records. Typical indications include the following, and the referral letter and operative note should name the one that applies:

• Chronic maxillary sinusitis that has not responded to treatment: disease that persists after documented medical management, such as antibiotics, nasal steroids or antral washout.
• Maxillary sinus cysts or polyps: antral cysts or extensive polyposis that need open access for complete removal.
• Oro-antral fistula with sinus disease: a persistent communication, often after a dental extraction, where the sinus also needs clearing through the canine fossa.
• Displaced root or foreign body in the sinus: a tooth root, implant component or instrument fragment that needs retrieval through open access.
• Biopsy or removal of a benign lesion: where the lesion needs the exposure that the Caldwell-Luc approach gives.

No diagnosis guarantees approval on its own. Each insurer applies its own policy terms, so check the indication against the patient’s cover before surgery.

Where E1220 sits in CCSD section 5.5 Nasal sinuses

Section 5.5 holds every maxillary, frontal and sphenoid sinus code in the ENT chapter. Each code has its own descriptor and complexity grade, and the grade drives the fee.

The fees below come from the Freedom Health Insurance Elite schedule of fees, Chapter 5, dated 1 October 2026. They show how one insurer prices the section. Other insurers publish their own fees for E1220, so check the schedule that applies to the patient’s policy.

Fee figures change with each schedule edition. For a wider view of the codes, see the Bupa CCSD procedure codes guide or the CCSD Technical Guide.

Codes commonly confused with E1220

Five section 5.5 codes are often mixed up with E1220. Each treats the maxillary sinus or its surroundings, but through a different route and with a different scope.

The deciding test is simple. Was there a sublabial incision and a bone window through the canine fossa? If not, the procedure is not E1220. The chart below maps each route an operative note can record to its code.

Where the note describes an endoscopic approach, the billing guides for E1260 and E1432 set out what each FESS code needs on file.

Documentation required to support an E1220 claim

Each document in the claim package answers a question the insurer may ask. A missing document slows payment, and chasing records after discharge takes far longer than collecting them on the day.

A complete E1220 package usually includes:

• Pre-operative imaging: a CT scan of the sinuses, or a cone beam CT or dental panoramic film where the problem is dental in origin. The report should name the sinus and describe the finding.
• Referral letter: from the GP, dentist or referring consultant, stating the diagnosis, the treatment already tried and the reason for surgery.
• Operative note: the sublabial approach, the canine fossa bone window, what was found and removed, any inferior meatal window and the closure. A structured operative note template makes missed fields less likely.
• Anaesthetic record: needed when the procedure was done under GA, and it supports the anaesthetist’s own invoice.
• Histopathology report: needed when tissue was sent to the laboratory.
• Authorisation number: where the insurer issued one, it goes on every invoice for the episode.

Pre-authorisation requirements for CCSD Code E1220

UK private medical insurers generally expect the patient to get authorisation before planned surgery. The insurer then issues an authorisation number for the episode of care.

Rules differ by insurer and by policy, so treat the points below as a checklist rather than a guarantee:

• Who asks: the patient usually contacts their insurer, but the practice often supplies the code and clinical details.
• What to provide: the diagnosis, the proposed procedure with CCSD Code E1220 stated, the treating consultant and the expected admission date.
• If the plan changes: if surgery ends up as a different procedure, tell the insurer and update the code before billing.
• If authorisation was not obtained: the insurer may decline the claim, and the patient can become liable for the fee.

Common reasons E1220 claims are denied

Most E1220 denials trace back to a small set of problems. Checking for them before submission is quicker than appealing afterwards.

• No authorisation: the insurer had no record of the episode before surgery.
• Weak clinical necessity: the records do not show that medical treatment was tried and failed.
• Wrong code: an antral washout or intranasal antrostomy billed as E1220. Use the comparison table above, and make sure the operative note supports the code you submit.
• Policy exclusions: the policy excludes the condition, for example as a pre-existing condition. Exclusions apply whatever the clinical need.
• Unbundling: E1220 and E1350 billed for the same session without a note that describes two distinct procedures.

Run every E1220 claim through a pre-submission checklist built on these five points before it goes to the insurer.

Billing E1220 alongside other CCSD codes

Billing E1220 with another code for the same session can be legitimate. It carries unbundling risk when the note does not keep each procedure separate.

Insurers also publish their own bundling notes. Freedom’s Chapter 5 guidance says FESS includes antrostomy, polyp removal and turbinate reduction, which should not be charged as extra procedures.

Practices that use the Bupa procedure codes fee schedule should also check Bupa’s current guidance on same-day procedures. Where the rules are unclear, ask the insurer in writing and keep the reply.

How claims management software keeps E1220 claims complete

An E1220 claim depends on several documents: the imaging report, the referral letter, the operative note, the anaesthetic record and the authorisation number. In many practices those sit in different systems, and the claim waits while someone collects them.

Pabau, our practice management and billing platform, keeps those documents on the patient’s treatment record. Its claims management software lets the practice attach each supporting document to the episode, alongside its CCSD code.

The result is a claim that leaves the practice complete, with the evidence an insurer may ask for already on file.

Send complete CCSD claims from one record

Pabau helps practices attach operative notes, authorisation numbers and anaesthetic records to each treatment record, so every E1220 claim goes out complete.

Book a demo

Conclusion

E1220 pays at the Intermediate grade, so the claim stands or falls on whether the operative note proves the open approach. Most coding errors on this procedure come from confusing it with E1310, E1330, E1350 or the FESS codes E1260 and E1432.

Confirm the code before surgery, record the authorisation number, and have the surgeon describe the canine fossa access in the note. With those three in place, the insurer can check the code against the note without coming back to you. Book a demo to see how Pabau keeps CCSD claims and their supporting documents together for private practices.

Continue your research

Looking for a broader CCSD reference? Bupa CCSD procedure codes explains how the CCSD schedule works for claims to Bupa and other UK insurers.

Checking how fees are set? Bupa procedure codes fee schedule explains how Bupa sets reimbursement for each CCSD code.

Billing other ENT procedures? CCSD code E3400 covers endoscopic cordectomy from Chapter 5 of the same schedule.

Coding other section 5.5 procedures? CCSD code E1240 covers vidian neurectomy, a Major code from the same section.

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