CCSD code E4400 – Carinal resection with or without pneumonectomy

Key takeaways

CCSD Code E4400 covers carinal resection with or without pneumonectomy, so one code applies whether or not the lung is removed.

E4400 sits in section 8.5 (bronchi/lungs/pleura) of the CCSD schedule with a Complex rating. The robot-assisted operation has its own code, E4401.

UK insurers such as Bupa, AXA Health, Aviva and Vitality generally expect pre-authorization before surgery, with the diagnosis coded in ICD-10.

The operative note must name the carina, describe the reconstruction and state whether a pneumonectomy was performed.

Pabau, our practice management platform, keeps the authorization number on the patient record and checks it before the claim goes to Healthcode.

CCSD Code E4400: Definition and what the code covers

CCSD Code E4400 is the UK private medical insurance code for carinal resection with or without pneumonectomy. Its official descriptor reads Carinal resection +/- pneumonectomy.

The carina is the ridge of cartilage where the trachea divides into the left and right main bronchi. Removing it means the surgeon has to rebuild the airway, and sometimes remove the lung on that side.

E4400 sits in chapter 8 (thorax and intra-thoracic organs), section 8.5 (bronchi/lungs/pleura), and carries a Complex rating.

The +/- notation means E4400 applies whether or not the lung is removed. The schedule has no separate code for carinal resection without pneumonectomy, so both outcomes are billed the same way. A robot-assisted operation is the exception, because it has its own code, E4401.

The procedure: Carinal resection with or without pneumonectomy

Carinal resection removes the point where the trachea divides and reconnects the airway with a primary anastomosis. It is one of the most demanding operations in thoracic surgery. The surgeon has to keep the patient ventilated while the airway is open, often through a right posterolateral thoracotomy.

The operation usually follows these stages:

1. Approach: a posterolateral thoracotomy, usually on the right, to reach the carina and distal trachea.
2. Assessment: bronchoscopy during the operation to confirm the tumor margin and how far it involves the carina.
3. Resection: excision of the carina, with any involved part of the distal trachea and proximal bronchi.
4. Reconstruction: a primary anastomosis that joins the trachea to the remaining bronchi, sometimes with the opposite bronchus reimplanted.
5. Pneumonectomy, if needed: removal of the lung on the same side when the tumor has spread into it, or when its bronchus can’t be saved.

Cardiopulmonary bypass is sometimes used when the airway can’t be ventilated safely during reconstruction. Whether it is needed depends on the surgeon and the case.

Clinical indications for carinal resection

Non-small cell lung cancer (NSCLC) that invades the carina is the most common reason for E4400. The operation is chosen when the tumor or involved nodes reach the carina and a smaller resection can’t clear the margins.

Other accepted indications include:

• Carcinoid tumors arising at or near the carina.
• Tracheal tumors that extend down to the bifurcation.
• Bronchial tumors where a sleeve lobectomy can’t achieve clear margins.
• Benign carinal stenosis, for example after prolonged intubation, which is less common.

UK private claims carry the diagnosis as an ICD-10 code. The codes most often paired with E4400 are C34.0 (main bronchus), C34.1 (upper lobe), C34.2 (middle lobe), C34.3 (lower lobe) and C33 (trachea). Code the principal diagnosis from the confirmed histology, not the working diagnosis on the referral.

What E4400 includes and what is billed separately

E4400 is one surgeon’s fee for the whole operation. The thoracic chapter of the CCSD schedule says a routine rigid bronchoscopy is not charged separately during intra-thoracic surgery. Neither is a chest drain inserted during the operation. The table shows who bills what.

Each insurer sets its own fee for E4400, and fees change. Check the current figure in the insurer’s schedule before you raise an invoice. For Bupa patients, the Bupa CCSD codes guide explains how that schedule works.

Related CCSD codes: Neighbors and common confusables

Several thoracic codes sit near E4400 in chapter 8. The right one depends on three questions. Was the carina itself resected? Was the whole lung removed? Was the operation robot-assisted? The decision tree below takes them in order.

E4600 is the code most often confused with E4400. It covers a sleeve resection of a bronchus or the pulmonary artery alongside a lung resection. Choose E4400 only when the operative note shows the carina itself was removed. For a tracheal resection that stops above the carina, see CCSD Code E3900.

Codes and sections in this table come from the CCSD-based chapter 8 fee schedule published by Freedom Health Insurance in June 2026.

Documentation requirements for CCSD Code E4400

Insurers assess the operative note against the CCSD descriptor. If the note doesn’t clearly support a carinal resection, the insurer has grounds to query or reject the claim. Record each of the following.

• The carina, by name: use “carina” or “carinal resection”. A general phrase such as “central airway resection” may not satisfy the insurer.
• Extent of resection: the length of trachea and bronchus removed, and which bronchi were involved.
• Reconstruction method: end-to-end anastomosis, bronchial reimplantation and any flap used to protect the join.
• Pneumonectomy status: whether the lung was removed or preserved, and which side.
• Surgical approach: open or robot-assisted, because the robotic operation is coded E4401.
• Cardiopulmonary bypass: whether it was used, and why.
• Margins: frozen-section results where they were obtained.
• Diagnosis: the ICD-10 code that matches the confirmed histology.

In Pabau, the operative note sits on the patient’s clinical record alongside the claim. Billing staff can check the note against the descriptor before the invoice goes out.

Pre-authorization: What UK private insurers require for E4400

UK private insurers such as Bupa, AXA Health, Aviva, Vitality and WPA generally expect pre-authorization before elective surgery. The patient usually contacts the insurer to get an authorization number. A claim without a valid number is likely to be rejected, and insurers rarely approve retrospective applications.

Evidence the insurer typically asks for:

• CT and PET-CT imaging that shows the carina is involved.
• The multidisciplinary team (MDT) recommendation and the specialist’s referral.
• Histology, where a biopsy was taken before surgery.
• The proposed code (E4400 or E4401), the hospital and the admission date.

For an urgent admission, contact the insurer as soon as possible. Each insurer sets its own notification rules, so confirm them against the patient’s policy.

How E4400 maps to CPT codes: A cross-reference for US-trained coders

UK private insurers don’t use CPT codes. CCSD claims reach insurers through Healthcode or a similar electronic claims platform. The cross-reference below is for US-trained coders working in UK private hospitals.

The two systems don’t line up one to one. CPT splits the operation into separate codes, while CCSD covers both outcomes with the +/- notation. CPT is maintained by the AMA for US billing, so never put a CPT code on a UK private invoice.

Common E4400 claim denial reasons and how to avoid them

E4400 denials usually trace back to the claim paperwork, such as a missing authorization number or an operative note that never names the carina. Build a pre-submission check for each trigger below into your medical claims management process.

For the appeal process itself, the guide to managing claim denials covers each step.

How Pabau keeps E4400 claims clean from pre-auth to payment

Many thoracic practices still run billing across separate tools. The authorization number sits in an email and the operative note in a document. Then someone keys the claim into Healthcode by hand, and the authorization reference or the approach can drop out along the way.

Pabau keeps the insurer, policy and authorization details on the patient record. When the invoice is ready, it pulls the patient, procedure and insurer details into the claim and sends it to Healthcode. Validation runs first, so a claim can’t go out without the membership number and authorization code.

Each claim then moves through clear stages, from pending and submitted to paid or error. Your billing team can see which E4400 claims need attention without phoning insurers.

Keep complex surgical claims moving

Pabau checks authorization codes and membership numbers before each CCSD claim goes out. It then sends the claim to Healthcode and tracks it through to payment.

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Conclusion

E4400 pays cleanly when the operative note names the carina and the approach matches the code. A valid authorization number has to be on file as well. If the carina wasn’t resected, switch to E4600 or E5410 rather than defending E4400 on appeal.

The trade-off is effort before surgery, because the pre-auth pack and a structured operative note take time. That time costs far less than an appeal weeks later. Book a demo to see how Pabau checks authorization details before each CCSD claim goes to Healthcode.

Continue your research

Coding a resection that stopped short of the carina? CCSD Code E4600 covers sleeve resection of a bronchus or pulmonary artery, the code most often confused with E4400.

Coding an airway repair that leaves the carina intact? CCSD Code E4030 explains how to bill tracheoplasty for UK private practice.

Pairing E4400 with a tracheal tumor diagnosis? ICD-10 code C33 sets out the documentation for a malignant neoplasm of the trachea.

Choosing a system to bill UK private insurers? Best medical billing software in the UK compares the platforms that handle CCSD claims, pre-authorization, and remittance.

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