CCSD code H5510 – Laying open of low anal fistula

Key takeaways

CCSD code H5510 covers laying open a low anal fistula, and sigmoidoscopy in the same operation is part of the code.

A sigmoidoscopy code billed next to H5510 is an unacceptable combination, so it comes off the claim.

A high fistula laid open bills under H5520, and because one tract gets one classification, the two codes are not claimed together for it.

Plug closure (H5530), seton placement (H5540) and endoscopic ablation (H5580) are different operations with their own codes.

The operative note decides the code, so it has to classify the fistula and say what was divided.

CCSD code H5510 covers more than the cut

CCSD code H5510 is the UK private practice code for laying open of low anal fistula (fistulotomy) (including sigmoidoscopy). The surgeon opens the fistula tract along its length so it heals from the base up. The sigmoidoscopy done in the same operation is part of the fee.

The code sits in Chapter 11 of the CCSD schedule, Abdomen (excluding urinary and reproductive organs), under 11.6 Rectum / Anus. The other anal fistula codes live alongside it in our CCSD codes library.

“Low” is the word that carries the claim. A low fistula crosses little or none of the anal sphincter, so the surgeon can divide the tissue over it with minimal risk to continence. Superficial, intersphincteric and low transsphincteric tracts usually fall here.

The sigmoidoscopy is already paid for

The descriptor names sigmoidoscopy, so the scope the surgeon passes during the fistulotomy is inside H5510. CCSD lists sigmoidoscopy codes, such as H2510, as unacceptable combinations with H5510.

Put one on the same claim and the insurer will strip that line, or query the whole bill.

The rule covers the same operation only. A colonoscopy booked as its own episode, on another day and for its own reason, is coded and claimed on its own.

Low or high decides the code

Several codes in 11.6 deal with anal fistula, and the five below cover the core choices. They split on two questions. Was the tract laid open or treated another way? If it was laid open, was it low or high?

H5510 and H5520 should not be claimed together for the same tract. One tract gets one classification, so the claim carries one of the two codes.

If the note never says low or high, the coder cannot pick between the two. Send it back to the surgeon rather than guessing.

The operative note has to prove it was low

Insurers read the operative note to check the code against the surgery. “Fistulotomy performed” proves an operation happened, but it does not prove H5510. A note that supports the code records five things.

• Fistula classification: the word “low”, or a named type such as intersphincteric or low transsphincteric.
• The tract: where the internal and external openings sit, and the course between them.
• Sphincter involvement: how much muscle the tract crosses, in the surgeon’s own assessment.
• What was divided: the tissue laid open, and confirmation that the whole tract was opened.
• The sigmoidoscopy: a line confirming it was done during the operation, even though it adds no fee.

That last point surprises people. The sigmoidoscopy is part of the descriptor, so a note without it describes a smaller operation than the one being claimed.

The claim starts with the surgeon

H5510 is the consultant surgeon’s code. The surgeon, or their medical secretary, sends the claim to the patient’s insurer under the surgeon’s own provider details.

Other people involved in the operation bill separately. The anesthetist sends a separate claim, and the hospital invoices its facility charges directly. Keeping these lines apart stops one claim from carrying another provider’s work.

Insurers usually expect surgery to be authorized before it happens, but the rules vary by insurer and by policy. Check with each insurer before the date is booked, and put the authorization number on the claim. Your insurer’s code search, such as Bupa’s code search, shows how it lists H5510.

Each insurer sets its own fee for the code. Our Bupa CCSD codes guide shows how one major insurer handles its schedule.

Where H5510 claims go wrong

H5510 queries tend to trace back to three mistakes. Each one is visible on the claim before it leaves the practice.

• Billing the sigmoidoscopy separately: a sigmoidoscopy code next to H5510 is an unacceptable combination. The line is rejected, and the claim may be held while the insurer reviews it.
• Mixing up low and high: H5520 claimed for a tract the note calls low invites a downgrade or an audit. H5510 claimed for a high tract underpays the surgeon.
• A vague operative note: “anal fistula laid open” with no classification, no tract and no sphincter assessment leaves the insurer unable to confirm the code.

Two smaller issues cause delays too. A claim sent without the authorization number stalls, and a diagnosis code that does not describe a fistula raises a mismatch query.

Five checks before you submit

Run this list against every H5510 claim. It takes a couple of minutes with the operative note open next to the claim.

1. The note classifies the fistula as low and describes the tract.
2. The note says what was divided and how much sphincter was involved.
3. The sigmoidoscopy is recorded in the note but missing from the claim lines.
4. H5520 is not on the same claim for the same tract.
5. The insurer’s authorization number and a matching fistula diagnosis are attached.

If any check fails, fix it before submission. A query after the fact costs more time than a question to the surgeon now.

Pabau keeps the note and the claim together

In many surgical practices, the operative note sits in one system and the claim is built in another. The coder then works from memory or a pasted summary, which is where low and high get swapped.

Pabau, the practice management software we build for private practices, stores the operative note, letters and authorization documents on the patient record. The person billing H5510 reads the same note the surgeon signed.

From that record, our claims management software sends the claim to UK insurers through the Healthcode integration. Fewer handoffs mean fewer chances for the sigmoidoscopy to slip onto the claim, or for the classification to go missing.

Claim H5510 from the operative note

Pabau keeps the operative note and supporting documents on the patient record and sends your CCSD claims through Healthcode. See it in a live walkthrough.

Book a demo

Conclusion

H5510 pays cleanly when the note and the claim agree. Let the operative note choose between low and high, keep the sigmoidoscopy off the claim, and leave H5520 for tracts the surgeon calls high.

When the note is thin, the fix is a quick question to the surgeon before submission. That conversation is cheaper than any insurer query.

Book a demo to see how Pabau puts the operative note and the fistula claim on the same record.

Continue your research

Was the fistula high, not low? CCSD code H5520: Laying open of high anal fistula covers the sister code and what its operative note must show.

Billing another rectum and anus procedure? CCSD code H4200: Perineal repair of prolapse of rectum walks through a neighboring Chapter 11 code.

Coding fistula surgery for a US payer? CPT code 46280: Anal fistula surgery billing and rates explains how complex fistula surgery is reported with CPT codes.

Looking up a different CCSD code? CCSD codes lists the procedure codes we cover, chapter by chapter.

Frequently asked questions