CCSD code E1742 – Lateral rhinotomy into sinuses

Key takeaways

CCSD code E1742 covers lateral rhinotomy into sinuses, an open external approach to the paranasal sinuses that differs from endoscopic surgery such as FESS.

It fits sinonasal tumors, inverted papilloma, and complex chronic rhinosinusitis where endoscopic access isn’t enough.

Freedom Health Insurance bands E1742 as Intermediate complexity but pays £500 for it, close to the £550 it pays for Major-band bilateral FESS.

UK private medical insurers require pre-authorization first, and a claim without an authorization reference is usually declined.

Operative notes must record the sinuses entered, the external approach, the pathology addressed, and whether surgery was unilateral or bilateral.

CCSD code E1742: Definition and clinical description

CCSD code E1742 is the code UK private medical insurers (PMIs) use for lateral rhinotomy into sinuses. The surgeon makes an external incision along the side of the nose and opens one or more paranasal sinuses: the maxillary, ethmoid, frontal, or sphenoid.

The code sits in section 5.5 (nasal sinuses) of the ear, nose and throat chapter of the CCSD schedule. Its official descriptor is Lateral rhinotomy into sinuses. The Freedom Health Insurance fee schedule bands it as Intermediate complexity, with a £500 specialist fee and a £285 anesthetist fee.

Section 5.5 also holds the endoscopic sinus surgery codes, external frontoethmoidectomy (E1410), and transnasal repair of a cerebrospinal fluid (CSF) leak (E1750). The CCSD code index lists the rest of the chapter.

Each insurer applies the schedule with its own fees and rules. The Bupa CCSD codes guide shows how one major insurer does it. Because the neighboring codes describe similar operations, picking the wrong one is a common reason auditors query or reject an ENT claim.

The lateral rhinotomy procedure: What it involves

Lateral rhinotomy is an open operation. The surgeon cuts from the inner corner of the eye (the medial canthus) down the side of the nose to the nasal ala. That external incision is what separates E1742 from the endoscopic sinus codes. The surgeon works under direct vision through an open field instead of through a telescope passed up the nostril.

After the incision, the surgeon lifts the soft tissue to expose the nasal bone and the sinonasal structures beneath it. Part of the lateral nasal wall is then removed to reach the sinuses. When the maxillary sinus is the target, this is often done through a medial maxillectomy approach.

Key procedural steps the operative note should capture:

• Site and length of the external skin incision
• Extent of lateral nasal wall removal or bone work performed
• Specific sinuses entered (maxillary, ethmoid, frontal, sphenoid)
• Nature of the pathology found and tissue removed or biopsied
• Whether a medial maxillectomy was performed as part of the approach
• Closure technique and any packing or stenting placed

The operation is done under general anesthesia. The anesthetist bills separately under the applicable CCSD anesthetic codes, so anesthesia is never bundled into E1742.

Clinical indications: When lateral rhinotomy into sinuses is performed

Lateral rhinotomy is reserved for cases where endoscopic access isn’t enough, or where the extent of disease calls for open visualization. Accepted clinical indications that support this code include:

• Inverted papilloma: a benign but locally aggressive sinonasal tumor that needs wide clearance, with the tumor base in direct view to cut recurrence risk
• Sinonasal malignancy: primary or secondary tumors of the nasal cavity and paranasal sinuses where oncological margins call for an open approach
• Complex chronic rhinosinusitis: cases where earlier endoscopic surgery failed, or where extensive polyposis or new bone growth blocks endoscopic access
• Foreign body removal: large or deeply embedded foreign bodies in the paranasal sinuses that an endoscope can’t reach
• Sinonasal mucocele: large frontal or ethmoid mucoceles that need open drainage and marsupialization

The indication in the operative note and on the claim form must match a valid ICD-10 diagnosis code. Insurers check the CCSD procedure code against that ICD-10 code to confirm medical necessity. A mismatch between the two is a common denial trigger.

E1742 vs related CCSD codes: Avoiding mis-coding

Lateral rhinotomy into sinuses is often confused with nearby codes for endoscopic sinus surgery or polypectomy. The table below shows how E1742 differs from its closest neighbors.

Descriptors and complexity bands above come from the Freedom Health Insurance schedule of fees (chapter 5, effective October 1, 2026). E1750 is sometimes mislabeled as medial maxillectomy, but maxillectomy codes sit in chapter 6, which covers the face, mouth, salivary glands, and thyroid.

The complexity band doesn’t predict the fee as neatly as you might expect. Freedom pays £500 for E1742, twice the £250 for intranasal antrostomy and only £50 below bilateral FESS.

For billing, the deciding factor is the approach. FESS (functional endoscopic sinus surgery) is done entirely through the nostril with no skin incision, and bilateral FESS is billed under E1432. If an external lateral nasal incision was made and a sinus was entered, E1742 is the correct code.

Billing a FESS code for an open rhinotomy, or billing both without separate documentation of each, risks a duplicate billing rejection. Freedom’s schedule also states that FESS already includes polyp removal, antrostomy, and turbinate reduction, so those aren’t charged as extra procedures.

Documentation requirements for a valid E1742 claim

Private medical insurers routinely audit ENT surgical claims. An E1742 claim with a thin operative note is likely to be queried or paid at a reduced rate. Structured digital forms for operative notes make it much harder to leave out a required element before the claim goes out.

The operative note must include all of the following to support a valid claim:

• Procedure name and CCSD code: state “lateral rhinotomy into sinuses” and reference E1742
• Approach description: confirm an external lateral nasal incision was used, since this separates E1742 from the endoscopic codes
• Sinuses entered: name each paranasal sinus accessed (maxillary, ethmoid, frontal, or sphenoid)
• Pathology addressed: describe the disease found and the tissue removed, biopsied, or drained
• Laterality: state unilateral or bilateral, and if bilateral, document each side separately
• Additional procedures performed: document a medial maxillectomy or septoplasty as a distinct procedure with its own code reference
• Surgeon name, GMC number, and date of surgery
• ICD-10 diagnosis code: code the operative diagnosis, and make sure it justifies the open approach

The Royal College of Surgeons of England sets out what an operative note should contain in its Good Surgical Practice guidance. A note written to that standard gives an insurer’s auditor very little to query.

UK GDPR also governs how patient data in operative notes is stored and shared. Make sure your practice’s data handling policy covers surgical records as well as the clinical file.

Pre-authorization requirements for CCSD code E1742

UK private medical insurers require pre-authorization before lateral rhinotomy is performed. That holds even though fee schedules band E1742 as Intermediate complexity rather than Major. Proceeding without an authorization reference number from the insurer almost always gets the claim declined, however medically necessary the surgery was.

Individual insurer requirements vary. The general framework across Bupa, AXA Health, Vitality, Aviva, and WPA is as follows:

• Referral letter: a letter from the patient’s referring clinician (GP or specialist) stating the clinical indication
• Specialist report: the ENT surgeon’s assessment confirming the diagnosis and the proposed procedure, including why an open approach is needed instead of an endoscopic one
• Imaging: CT or MRI of the paranasal sinuses is typically required, particularly where a tumor or inverted papilloma is suspected
• Evidence of prior treatment: for chronic rhinosinusitis, the insurer will usually want evidence that endoscopic surgery or medical management was tried and failed

Check each insurer’s requirements before you submit the pre-authorization request. The Bupa code search portal and the Vitality fee finder show whether a CCSD code needs pre-authorization and what each insurer pays. Requirements change, so rely on the live insurer portal over old paperwork.

Common claim denial reasons and how to avoid them

For CCSD code E1742, these are the denial triggers to plan around:

Bilateral and staged procedures: Coding rules for E1742

Lateral rhinotomy is usually unilateral, with one side of the nose opened to reach the affected sinus. Watch the wording of the descriptor here. Most section 5.5 codes include “and bilateral,” meaning one code covers both sides, but E1742’s descriptor does not.

So when both sides are operated on in one session, billing depends on the insurer’s contract and current CCSD guidance. The general approach across most UK private medical insurers is:

• Bilateral in one session: bill E1742 twice (one unit per side) and document both sides in the operative note. Record the sinuses entered and pathology addressed on each side. Some insurers want a bilateral modifier or a cover letter confirming both sides were operated on. Confirm the insurer’s bilateral rule before submitting.
• Staged procedures (separate encounters): if the two sides are operated on at different dates, bill each encounter as its own claim. Each one needs its own pre-authorization reference, operative note, and claim form, so never combine them on one invoice.
• Reduced fee for bilateral: several PMIs cut the fee for the second procedure in a bilateral pair. The Aviva fee schedule and similar insurer documents set the reduction for ENT codes. Check the current schedule before quoting the patient a fee.

When in doubt, call the insurer’s provider line before billing. A pre-submission query costs nothing. A rejected bilateral claim means resubmission delays and a possible shortfall in the practice’s revenue.

How Pabau supports CCSD billing for ENT and surgical practices

Private ENT practices juggle pre-authorization status, operative notes, and claim submission across several insurers, each with its own rules and fees. Pabau keeps those pieces together on one patient record. Its private practice claims software tracks each claim from the pre-authorization request to payment, with an audit trail for any insurer query.

For CCSD billing workflows, Pabau supports:

• Storing insurer pre-authorization reference numbers against the patient record, so they’re ready at invoicing
• Generating invoices with the CCSD code, ICD-10 diagnosis code, surgeon details, and operative date in the format UK insurers require
• Tracking outstanding claims by insurer, so the practice can follow up before aged debt builds up
• Keeping a complete billing record alongside the clinical record for audits

When the authorization reference, CCSD code, and ICD-10 code sit on the same invoice, the insurer’s claims team has fewer reasons to send it back. Your team spends less time resubmitting paperwork and more time on the next patient.

Manage CCSD billing and pre-authorization in one place

Pabau helps private ENT and surgical practices track CCSD codes, pre-authorization status, and claim submissions, so every invoice reaches the insurer complete.

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Conclusion

E1742 claims rarely fail because of the surgery itself. They fail on paperwork: a missing authorization reference, a note that never mentions the external incision, or a FESS code billed alongside it. Every one of those is fixed before the patient reaches the operating room.

Check the patient’s insurer schedule for the fee and the bilateral rule first, because the Intermediate band on E1742 says little about what it pays. Then write the operative note to the standard an auditor expects.

Book a demo to see how Pabau keeps pre-authorization references, operative notes, and CCSD invoices together for private ENT practices.

Continue your research

Reaching the ethmoids through the maxillary sinus? CCSD code E1440 explains billing for transantral ethmoidectomy.

Exploring the frontal sinus endoscopically? CCSD code E1480 covers endoscopic frontal sinus exploration and its documentation.

Frequently asked questions