CCSD code C1640 – Tarsorrhaphy

Key takeaways

CCSD code C1640 covers tarsorrhaphy in any variant (lateral, medial, partial, or total) under a single code.

Lagophthalmos secondary to facial nerve palsy is a common indication, and clinical documentation must confirm the specific diagnosis to support medical necessity.

Proceeding without prior authorization where the insurer requires it is a common cause of C1640 non-payment, so verify pre-auth requirements before scheduling.

Pabau’s claims management tools help private ophthalmology practices track pre-authorization status and spot missing documentation before a C1640 claim goes out.

What is CCSD code C1640?

CCSD code C1640 is the UK private medical insurance billing code whose official descriptor is “Tarsorrhaphy.” It covers surgery in which the upper and lower eyelid margins are sutured together to protect the cornea.

It belongs to the C-series of CCSD codes, which covers ophthalmic surgical procedures. Insurers that use the CCSD framework list it in their fee schedules (Bupa and Freedom both do in 2026). A single C1640 claim covers the tarsorrhaphy construction regardless of whether the approach is lateral, medial, partial, or total.

The CCSD is maintained by a consortium of UK healthcare bodies and insurers. All participating insurers publish their own fee schedules against CCSD codes. So the reimbursement rate for C1640 varies by insurer and by the terms agreed with each consultant.

What is the tarsorrhaphy procedure?

Tarsorrhaphy is a surgical procedure that joins the upper and lower eyelid margins, either partially or fully. It reduces the palpebral aperture and protects the corneal surface. It is performed under local or general anesthetic depending on patient factors and extent of closure required.

There are four main variants, all of which bill under C1640:

• Lateral tarsorrhaphy: The outer (temporal) portion of the lids is sutured together. This commonly performed variant reduces corneal exposure without significantly impairing central vision.
• Medial tarsorrhaphy: The nasal aspect of the lids is joined. It is used less often, typically for medial corneal exposure or post-traumatic defects.
• Partial (or limited) tarsorrhaphy: A defined segment of the lid margin is fused, with the extent tailored to the degree of corneal exposure.
• Total tarsorrhaphy: Full closure of the palpebral aperture. It is reserved for severe corneal threat where partial closure is insufficient.

The surgeon freshens the lid margin epithelium and places sutures through the tarsal plates or lid margins. The sutures are then tied to achieve the desired degree of closure. Temporary tarsorrhaphy uses sutures that are left in place until the underlying cause resolves. Permanent tarsorrhaphy involves tissue apposition that does not spontaneously reverse.

Clinical indications: When is tarsorrhaphy performed?

Tarsorrhaphy is indicated whenever corneal exposure threatens the integrity of the corneal epithelium and conservative measures (lubricants, moisture chambers, scleral lenses) have proved insufficient. Each indication must be documented clearly to support C1640 medical necessity.

What CCSD code C1640 includes and excludes

Understanding the scope of CCSD code C1640 prevents two common billing errors. These are under-claiming (omitting legitimate concurrent codes) and over-claiming (reusing C1640 for procedures it does not cover).

Adjacent and related CCSD codes

Oculoplastic practices billing C1640 routinely encounter the following codes. Review the Bupa CCSD codes reference for full descriptor listings across the ophthalmology chapter.

Always verify concurrent billing rules with each insurer’s current Schedule of Procedures and Prices (SOPP) before submitting. Bundling policies differ between Bupa, AXA Health, and Vitality. If the ptosis repair uses a fascia lata sling, the C1813 guide covers the graft detail insurers expect.

Fees differ by insurer, but one published schedule shows how C1640 compares with these neighbors. Freedom’s 2026 specialist fees put tarsorrhaphy below every ectropion, entropion and ptosis repair in the table.

How CCSD code C1640 maps to CPT codes

Some practices also see international patients billed under US CPT coding. For them, the nearest CPT equivalents to C1640 are 67880 and 67882. CPT 67880 covers construction of intermarginal adhesions, median tarsorrhaphy, or canthorrhaphy. CPT 67882 covers the same procedure with transposition of tarsal plate.

Temporary closure of the eyelids by suture has its own code, CPT 67875. The mapping is approximate, not official. The two systems do not share a published crosswalk.

The key practical difference is that the CCSD does not split C1640 by technique. A temporary suture closure, a permanent intermarginal adhesion and a tarsal-plate transposition all bill as C1640 in the UK private system. In the US, they attract different CPT codes (67875, 67880 and 67882) and different Medicare RVU values.

Practices billing both systems for the same patient should note which technique was used in the operative report, since US payers will ask.

Documentation requirements for CCSD code C1640

Incomplete documentation is a common cause of C1640 claim rejection. Every claim should be supported by a clinical record that contains all of the following elements.

• Confirmed clinical indication: State the diagnosis driving the procedure explicitly, not by implication. Examples include lagophthalmos secondary to Bell’s palsy or exposure keratopathy from thyroid eye disease. Include the relevant ICD-10 diagnostic code where the insurer requires it.
• Conservative treatment history: Document what was tried first (lubricants, moisture chambers, bandage contact lens, punctal plugs) and why it was insufficient. Insurers expect evidence that surgery was not the first-line response.
• Technique and extent of closure: The operative note must specify whether the approach was lateral, medial, partial, or total. It should also give the approximate horizontal extent of the closure in millimeters.
• Anesthetic method: Record whether local anesthetic (LA) or general anesthetic (GA) was used. This affects the anesthetic billing and may affect how the insurer categorizes the procedure.
• Supporting investigations: Corneal photography, slit-lamp findings showing epithelial breakdown, Schirmer test results, or photographs of lagophthalmos on attempted closure all strengthen the claim. They also reduce the risk of a medical necessity challenge.
• Consent documentation: Confirm written informed consent for the tarsorrhaphy procedure was obtained and documented.

An operative note that cites the indication, technique, and extent of closure is one of the most effective ways to avoid a medical necessity challenge. Review your practice’s medical billing compliance process to ensure operative notes are completed and attached before claim submission.

Prior authorization requirements for tarsorrhaphy

Most major UK private insurers require prior authorization before tarsorrhaphy. Proceeding without pre-authorization where it is required is a common cause of C1640 non-payment. Policies differ by insurer, policy type, and clinical urgency, so always verify directly with the individual insurer before scheduling.

A pre-authorization request typically needs the confirmed diagnosis and a brief clinical summary of the conservative treatment tried. Insurers also expect the consultant’s recommendation for tarsorrhaphy and the anticipated procedure date. Submit this before the patient is listed.

Why C1640 claims get denied

C1640 claims are denied for a predictable set of reasons. Each has a straightforward corrective action.

• Missing or inadequate pre-authorization: A common cause of C1640 non-payment. The insurer will not reimburse a procedure it was not notified about in advance, emergencies aside. Corrective action: Always obtain pre-auth before scheduling elective tarsorrhaphy and retain the authorization reference number.
• Insufficient clinical justification: The operative note or consultation letter does not demonstrate that tarsorrhaphy was medically necessary. Corrective action: Ensure every C1640 claim is accompanied by documentation of the indication, supporting investigations, and a record of failed conservative treatment.
• Missing diagnostic code: Some insurers require the corresponding ICD-10 diagnosis code (e.g. H02.2 for lagophthalmos, H18.2 for corneal edema) alongside the CCSD procedure code. Corrective action: Include the relevant diagnosis code on the claim form as required by the individual insurer’s submission guidelines.
• Anesthetic code misalignment: The anesthetic code submitted does not match the procedure category or duration. Corrective action: Confirm with the anesthetist that the code submitted aligns with the insurer’s anesthetic billing rules for C1640.
• Global surgical package confusion: Billing C1640 as part of a bundled episode when the insurer treats it as a discrete event, or vice versa. Corrective action: Check each insurer’s SOPP for post-operative follow-up bundling rules.

A structured denial management workflow ensures rejections are caught, investigated, and resubmitted within the insurer’s appeal window. That window typically runs 30 to 90 days from the original decision.

Billing a tarsorrhaphy takedown

Published 2026 CCSD schedules, including the Bupa CCSD reference, list C1640 Tarsorrhaphy as the only tarsorrhaphy code. None of them lists a separate code for dividing or reversing a tarsorrhaphy.

That means a takedown has no listed CCSD code. Before you schedule one, ask the insurer which code it expects and record its answer alongside the pre-authorization reference.

The operative note should still show that the procedure took down an existing tarsorrhaphy. Record the original site and extent, the reason for reversal, and the technique used.

Reimbursement and fee schedule guidance

CCSD codes do not carry a single national fee. Each insurer publishes its own Schedule of Procedures and Prices (SOPP) that sets the reimbursable amount for C1640 under their policies. The rate a consultant can charge privately may exceed the insurer’s SOPP rate. That shortfall must be discussed with the patient before treatment.

For a published benchmark, Freedom’s Elite schedule (updated January 2026) places C1640 in its Intermediate complexity band. It allows a £250 specialist fee and a £213 anesthetist fee.

• Bupa and AXA Health publish open fee schedules that practices can access through their provider portals. Verify the current C1640 rate in the relevant schedule year, as fees are updated periodically.
• Aviva, Vitality, WPA, and others may require practices to have a direct recognition agreement or contact their provider teams for the applicable rate.
• Shortfall billing: The consultant’s private fee may exceed the insurer’s C1640 rate. In that case, the practice must tell the patient in writing about the expected shortfall before the procedure. Failure to do so can result in billing disputes and GMC complaints.
• Fee schedule version: Always check the SOPP version date. Citing an outdated rate is a common source of invoicing errors, particularly after annual CCSD schedule revisions.

Practices moving from NHS into private ophthalmology should also review the Bupa procedure codes fee schedule. Check how CCSD coding applies to the recognition agreement with each insurer, too.

How claims management software protects C1640 claims

Each denial reason above starts with paperwork that sits outside the billing system. The pre-auth reference lives in an email, or the operative note reaches the insurer after the claim does.

In Pabau’s claims management software, the CCSD submission, the authorization reference and the operative note sit on one patient record. Your team tracks each C1640 claim from submission to payment.

Insurer payments are checked against the expected SOPP fee, and short-paid claims get flagged. That way, you can query a shortfall inside the appeal window instead of finding it at month end.

Managing pre-authorization across multiple insurers?

Pabau helps private ophthalmology and oculoplastic practices track pre-auth status, attach supporting documentation to claims, and reduce the administrative burden of CCSD billing.

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Conclusion

Choosing the code is the easy part of billing tarsorrhaphy. C1640 covers every variant, so the coding decision rarely needs a second look.

Payment turns on the work done before surgery. Confirm pre-authorization, write the indication and extent into the operative note, and check the insurer’s current SOPP rate. A practice that finishes those steps before listing the patient protects the fee.

A takedown is the one case to settle with the insurer first, because no listed CCSD code covers it. Book a demo to see how Pabau keeps pre-auth references, operative notes and CCSD claims on one patient record.

Continue your research

Correcting a droop rather than closing the lid? CCSD code C1813: Fascia lata ptosis correction billing guide covers the graft and harvest-site detail insurers expect in the operative note.

Treating eyelid lesions in the same practice? CCSD code C1230: Eyelid lesion curettage billing guide shows where neighboring eyelid codes trip up claims.

Protecting the cornea with sutures instead? CCSD code C4980: Corneal tension sutures billing guide explains what the code includes and why insurers deny it.

Coding the corneal problem behind the closure? ICD-10 code H18.9: Unspecified disorder of cornea sets out when to swap the unspecified code for a more specific H18 code.

Recording the eyelid condition on the claim? ICD-10 code H02.9: Unspecified disorder of eyelid compares H02.9 with H02.89 and lists the documentation payers expect.

Frequently asked questions