CCSD code B3590 – Operations on ducts of nipple

Key takeaways

CCSD code B3590 covers surgical operations on the ducts of the nipple, including microdochectomy and total duct excision (Hadfield’s operation).

UK private medical insurers typically require pre-authorization before a B3590 procedure. Missing it is the leading denial trigger.

Every B3590 claim needs a detailed operative note naming the procedure, laterality, the duct or ducts involved, and specimen disposition.

Pabau, the practice management platform we build, helps private breast surgery practices capture CCSD codes and track pre-authorization before claims go out.

CCSD code B3590: Definition and scope

CCSD code B3590 sits within the breast chapter of the CCSD schedule, the code set that governs procedure billing across UK private healthcare. Its descriptor is “Operations on ducts of nipple.”

The code applies when a consultant breast surgeon performs any recognized surgical intervention on the lactiferous (mammary) duct system. That ranges from a targeted single-duct excision to a complete subareolar duct clearance.

It is billable on funded private medical insurance (PMI) claims and on self-pay invoices, provided the operative note supports the procedure described. If you already bill Bupa CCSD procedure codes, B3590 follows the same submission structure as the other breast codes in our CCSD code library.

B3590 does not represent a single defined operation. It is a category code covering several named procedures that share one anatomical target, the mammary duct. Unlike adjacent breast codes, B3590 concerns the ductal system of the nipple, not the surrounding breast parenchyma, nipple skin, or areola.

What procedures does B3590 cover?

B3590 encompasses four main operative variants performed on the ducts of the nipple. Each involves a different extent of ductal excision and carries different documentation implications for billing.

Microdochectomy is the most frequently billed variant. It targets a single duct identified by perioperative dye injection or lacrimal probe cannulation. The surgeon excises that duct with its surrounding periductal tissue and sends the specimen for histopathology.

Total duct excision (the Hadfield operation) removes all of the subareolar ducts in one procedure. It is typically reserved for bilateral or multi-duct discharge, duct ectasia causing recurrent infection, or cases where a single-duct approach has not resolved symptoms.

Clinical indications: When is B3590 performed?

Operations on the nipple ducts are performed once the cause of pathological nipple discharge has been localized. They usually follow conservative management that has not resolved it. In UK private practice, the referral typically comes from a GP or breast physician after imaging and cytology.

The main clinical indications documented to support a B3590 claim are:

• Pathological nipple discharge (spontaneous, unilateral, single-duct, serous or bloody) where cytology or imaging suggests an intraluminal lesion
• Intraductal papilloma confirmed or suspected on ductoscopy, galactography, or MRI breast
• Ductal ectasia with recurrent periductal mastitis or persistent discharge unresponsive to antibiotics
• Ductal carcinoma in situ (DCIS) presenting with nipple discharge, where duct excision is the planned procedure
• Suspicious cytology from nipple discharge with an underlying lesion requiring surgical characterization

Documentation must state the specific indication clearly. Vague entries such as “nipple discharge” without specifying whether it is unilateral, spontaneous, or associated with a lesion will draw a payer query. The ICD-10 diagnosis code submitted alongside B3590 should match the documented indication precisely.

How the procedure is performed

Understanding the operative steps helps billing teams identify what the operative note must contain and whether companion codes for anesthesia or histopathology are justified.

1. Anesthetic and positioning: Microdochectomy may be performed under local anesthetic with sedation or under general anesthetic. Total duct excision almost always requires general anesthetic. The choice affects which anesthetic CCSD code pairs with B3590.
2. Duct identification: A lacrimal probe or duct dilator is passed into the discharging duct through the nipple. Some surgeons inject methylene blue dye to stain the duct for easier visual identification during dissection.
3. Periareolar incision: An incision is made at the areolar margin, typically following the natural border to minimize visible scarring. The dissection proceeds beneath the areola.
4. Ductal excision: For microdochectomy, the probe-identified duct and surrounding periductal tissue are excised to their proximal extent. For total duct excision (Hadfield’s operation), all major subareolar ducts are divided at the nipple base and dissected free as a cone of tissue.
5. Specimen management: The excised tissue is sent for histopathology. The operative note must record that a specimen was taken and sent. This justifies billing a histopathology code alongside B3590.
6. Closure: The subareolar cavity is closed in layers and the skin incision sutured or closed with adhesive strips. A dressing is applied. Most patients go home the same day.

Codes commonly used alongside CCSD code B3590

B3590 rarely travels alone on a claim. The following companion codes are routinely submitted in the same episode, depending on the specific procedure performed and the clinical circumstances.

UK private insurers work from the WHO edition of ICD-10, so the codes above use its four-character form rather than US ICD-10-CM codes. Diagnosis code pairings are a frequent source of payer queries. The diagnosis code submitted must match the clinical indication documented in the operative note and any pre-operative imaging reports. Submitting D24 (benign neoplasm) when the operative note only documents discharge without confirmed papilloma will draw a query or denial.

B3590 vs adjacent CCSD breast codes: How to choose

Several breast codes can be confused with CCSD code B3590. The distinctions below reflect the anatomical focus and operative intent of each code, not simply the incision site.

The operative note is the deciding document. If the note describes excision of a single identified duct with a lacrimal probe, that is B3590. If it describes excision of a breast lump with no ductal involvement, a parenchymal excision code such as B2800 applies instead. Conflating the two is a frequent miscoding error on nipple-related breast claims.

Documentation requirements for B3590

Every B3590 claim sent to a UK private medical insurer needs supporting documentation. It must confirm the named procedure was performed and that the clinical record matches the code. Digital operative note templates reduce transcription errors and capture key fields before the claim is submitted.

The operative note for B3590 must include all of the following:

• Named procedure: State the specific operation explicitly, for example “microdochectomy of the right breast” or “total duct excision (Hadfield’s operation), left breast.” Generic terms such as “breast operation” are not acceptable.
• Laterality: Specify right, left, or bilateral. Payers routinely flag a note that leaves laterality out.
• Duct(s) involved: For microdochectomy, indicate which duct was targeted and how it was identified (probe-guided, dye-assisted). For total duct excision, confirm that all major subareolar ducts were excised.
• Anesthetic type: Record whether the procedure was performed under general anesthetic, local anesthetic with sedation, or local alone. This determines whether a separate anesthetic code is appropriate.
• Specimen disposition: Confirm the excised tissue was sent for histopathology, including the receiving laboratory. This is required to justify a histopathology companion code.
• Treating consultant’s GMC number: This is a standard requirement on all UK private practice claims. The GMC number identifies the responsible consultant and is checked against the payer’s recognition database.
• Pre-operative imaging reference: Where imaging (ultrasound, galactography, MRI) informed the operative decision, reference the report in the note. Some payers require imaging evidence before authorizing the procedure.

Pre-authorization: What private UK insurers require for B3590

Most major UK PMIs require pre-authorization before a B3590 procedure is performed. Skipping it is the most common reason nipple duct surgery claims go unpaid. A well-written operative note does not rescue a claim the insurer never approved.

Pre-authorization requirements vary by insurer, and the rules change. The table below summarizes general requirements, so verify with the relevant payer portal before booking.

The Bupa fee schedule and each payer’s own portal are the authoritative sources for current fee and authorization data. Registering on every portal early avoids delays when an authorization is needed urgently.

When submitting the authorization request, include the CCSD code B3590, the planned procedure name, the ICD-10 diagnosis code, laterality, and the referring clinician’s details. Some payers want the breast imaging report at the pre-authorization stage, not only with the final claim.

Common claim denial reasons for CCSD code B3590

Most B3590 denials and payer queries are preventable. Automated claims management that checks documentation before submission catches most of these issues before the claim leaves the practice.

• Missing pre-authorization: This is the most frequent denial. The procedure is performed and the note is detailed, but no pre-authorization was obtained. PMIs will not pay without an authorization number, and retrospective authorization is rarely granted for elective procedures.
• Absent or incomplete operative note: A brief note that omits the named procedure, laterality, or duct identification technique does not support the B3590 code. Payers treat an insufficiently detailed note as inadequate evidence that the procedure was performed as coded.
• Incorrect or missing ICD-10 diagnosis code: Submitting B3590 without a paired diagnosis code is a leading cause of claim queries. So is a code that does not match the documented indication. Each payer has an accepted list of diagnosis codes for B3590 procedures, so verify it before submitting.
• Wrong code applied: Billing a breast parenchyma excision code when the operative note describes a duct excision, or vice versa, creates a mismatch. That conflict between the code and the clinical record triggers a query or denial.
• GMC number missing: The treating consultant’s GMC number is required on every private claim. Claims missing this identifier are routinely rejected at the validation stage before they reach clinical review.
• Histopathology unbundling error: Some practices bill a histopathology code without a specimen being sent, or fail to bill it when a specimen was sent. Both create inconsistencies. Bill the histopathology code if and only if the operative note confirms the specimen was sent for laboratory analysis.
• Laterality inconsistency: If the pre-authorization was granted for the right breast and the claim is submitted for the left, the claim will be queried. Laterality on the claim must match laterality on the authorization and in the operative note.

Each of these denials maps to one check that billing staff can run before the claim goes out.

When a claim is denied, the appeal should include:

• A copy of the operative note
• The pre-authorization reference number
• Any imaging reports referenced in the note
• A covering letter citing the CCSD code and the clinical rationale

Checking each claim at the point of care cuts the number of appeals a practice has to write in the first place.

How Pabau keeps B3590 claims clean from consultation to submission

In many private breast surgery practices, operative notes live in one system and pre-authorization numbers sit in email. Billing staff then re-key the claim by hand, which is where laterality and code mismatches creep in.

In Pabau, the operative note template can require the named procedure, laterality, ducts involved and specimen disposition before it is signed. The invoice is raised against the patient’s insurer from the same record, and the claim goes to Healthcode without re-keying.

Each claim is then tracked through clear stages, such as pending and submitted. A queried B3590 claim gets spotted early rather than at month end.

Streamline your CCSD billing from consultation to claim

Pabau helps private breast surgery practices capture CCSD codes accurately and keep pre-authorization details with each claim. Operative notes carry the detail payers need, so fewer claims come back queried.

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Conclusion

For B3590, billing starts before the patient reaches the operating room. Agree the pre-authorization number, laterality and ICD-10 code first, and the operative note only has to confirm them.

The trade-off is extra admin at booking in exchange for fewer queried claims after surgery. Build those checks into your note templates once, and every later claim inherits them.

Book a demo to see how Pabau links operative notes, pre-authorization and Healthcode claims for private breast surgery practices.

Continue your research

Need guidance on Bupa CCSD code submissions? Bupa CCSD procedure codes covers how Bupa structures its code schedule and what billing teams need to know when submitting claims.

Looking for the current Bupa fee schedule? Bupa procedure codes fee schedule breaks down procedure fee categories and submission requirements for UK private practice.

Billing a breast lump excision instead? CCSD code B2800 explains how to bill excision of a breast lump or fibroadenoma.

Coding a core biopsy before surgery? CCSD code B3212 walks through billing a percutaneous suction core biopsy for UK private insurers.

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