CPT code 19298: Breast brachytherapy catheter billing guide

Key takeaways

CPT code 19298 covers placement of multiple tube and button afterloading brachytherapy catheters into the breast after a partial mastectomy.

This is a radiation oncology procedure, not a diagnostic marker or lesion localization service, and imaging guidance is bundled into the code.

Report 19296 for a balloon applicator placed on a separate date, and add-on 19297 when placement happens during the lumpectomy.

Catheter placement never includes the radiation itself, which is billed separately with the high dose rate delivery codes 77770 to 77772.

Practice management software like Pabau keeps placement and delivery claims aligned so neither leg of the episode is denied.

CPT code 19298 covers the placement of multiple tube and button afterloading catheters into the breast for brachytherapy. The implant follows a partial mastectomy and sets up partial breast irradiation.

Despite sitting in the breast surgery range of the codebook, 19298 belongs to radiation oncology. The diagnostic marker codes around it do a completely different job.

This reference covers the official CPT descriptor, the clinical situations that support the code, and the modifiers that apply. It also sets out CY 2026 Medicare rates, the National Correct Coding Initiative (NCCI) bundling rules, and the documentation payers ask for on audit.

Every figure traces back to Medicare or the American Medical Association.

What CPT code 19298 covers

19298 covers a multicatheter interstitial brachytherapy implant placed in the breast after a partial mastectomy. The AMA descriptor runs long, so here it is in two halves.

• Placement of radiotherapy afterloading brachytherapy catheters (multiple tube and button type) into the breast for interstitial radioelement application
• following (at the time of or subsequent to) partial mastectomy, includes imaging guidance

Four phrases in that descriptor carry the billing weight. “Afterloading” means the catheters go in empty and the radioactive source is introduced later. “Multiple tube and button type” means a multicatheter interstitial implant rather than a balloon applicator. “Following partial mastectomy” allows the same session or a later date. “Includes imaging guidance” rules out a separate guidance code.

The code sits in the introduction procedures range of the breast section, which is why it is so often misread. Its neighbors at the low end of that range are diagnostic localization codes. 19298 is not one of them. It exists to get radiation into the tumor bed.

When CPT 19298 is the right code

Report 19298 when a multicatheter interstitial brachytherapy implant is placed in the breast after breast-conserving surgery. The catheters run through the tissue around the surgical cavity and exit the skin, held in place by buttons. A radiation oncologist then loads each channel from a remote afterloader.

• Partial breast irradiation after a lumpectomy, where the implant treats the tumor bed rather than the whole breast
• Cavity geometry that rules out a balloon, such as a thin skin bridge, an irregular seroma, or a cavity close to the chest wall
• A boost to the tumor bed delivered by interstitial brachytherapy after whole-breast external beam radiation
• Re-irradiation of an ipsilateral recurrence in a breast that has already had a lumpectomy and radiation
• Placement on a later date, once final margins and nodal status are confirmed on pathology

Every one of those scenarios shares one requirement. The record has to show a partial mastectomy that the implant follows. Without it the descriptor is not met, and the claim has no clinical support. Solid clinical documentation standards make that link easy for an auditor to trace.

CPT 19298 vs. 19296 and 19297

The three catheter placement codes split by applicator type and by timing. Choose the applicator first, then the date, and the code follows. The table below maps the three codes against the partial mastectomy codes they relate to.

The practical difference between 19296 and 19298 is the hardware. 19296 covers an expandable balloon or strut applicator sitting inside the cavity. 19298 covers a set of plastic catheters threaded through the tissue around it. Because 19298 is not an add-on code, it does not need a primary code beside it on the claim.

Codes this family is often confused with

CPT 19281 through 19288 cover placement of a breast localization device, such as a clip, pellet, or wire, with imaging guidance. Those are diagnostic codes that mark a lesion for biopsy or surgery. They have nothing to do with radiation delivery, and 19298 is never a substitute for them.

The older needle localization wire codes 19290 and 19291 were deleted in CPT 2014. The 19281-19288 series replaced them. Coding references that still carry the wire localization wording are out of date, so check the descriptor in the current codebook before you bill.

Applicators, placement codes, and matching delivery codes

The applicator you place determines both the placement code and the number of channels on the delivery claim. High dose rate delivery, shortened to HDR, is billed by channel count. Payers compare the two claims, and a multicatheter implant billed under 19298 with a single-channel code is an obvious mismatch.

Treat the delivery codes above as the usual pairing, not a rule. Bill the code that matches the channels actually loaded for that fraction. A 14-catheter implant with only 11 channels loaded is reported as 77771, not 77772.

Modifiers for CPT code 19298

Because 19298 is a standalone surgical code rather than an add-on, the full set of surgical modifiers is in play. That is the opposite of the position for 19297, which is exempt from modifier 51. The modifiers below come up most often on breast brachytherapy claims.

Modifier rules move with payer contracts and with each quarterly NCCI update. Check the provider manual before you submit, and keep the choice consistent with the operative note. That alignment is part of maintaining HIPAA-compliant documentation practices.

ICD-10 codes that support the claim

The diagnosis has to establish active breast cancer in the treated breast. Pick the most specific subsite code available, and make the laterality match the modifier. The codes below are the ones that appear most often alongside a brachytherapy implant.

Do not lead with Z85.3, personal history of malignant neoplasm of breast, while disease is being treated. History codes belong on surveillance encounters. Using one as the primary diagnosis undercuts medical necessity for the implant.

Reimbursement for CPT code 19298

Medicare pays 19298 through the Medicare Physician Fee Schedule, and the rate is rebuilt every January. The figures below are CY 2026 national unadjusted amounts, before the geographic practice cost index is applied. Confirm your own locality with the Medicare fee schedule lookup tool.

Physician fee schedule RVUs and rates

The difference between the two settings is all practice expense. A non-facility rate has to cover the applicator, the catheters, and the imaging equipment. In a hospital those same items are paid to the hospital instead.

That is why the facility rate covers only professional work. 19297 pays the same in both columns because add-on codes carry no separate practice expense split.

Those non-facility figures look startling, and they rarely get paid. Interstitial breast brachytherapy is almost always performed in a hospital outpatient department. The alternatives are an ambulatory surgery center or a hospital-affiliated cancer treatment center. Treat the facility column as your working number, and verify the setting before you quote a rate.

Hospital outpatient payment under OPPS

On the hospital side, catheter placement is paid through the Outpatient Prospective Payment System. CPT 19296 carries status indicator J1 and maps to comprehensive Ambulatory Payment Classification (APC) 5093. Almost everything else on that claim then packages into one payment. 19297 carries status indicator N and is never paid separately.

Check the current OPPS Addendum B for the APC and status indicator assigned to 19298 in the year you are billing. Assignments move between years. The HDR iridium-192 source is paid separately as C1717, per source, so the units field has to reflect every source used.

Bundling rules and NCCI edits

Imaging guidance is bundled into 19298 and cannot be reported separately. The NCCI policy manual is explicit about it. Guidance codes such as 76942, 76998, 76000, 77002, and 77003 are not separately payable here. CT guidance for radiation field placement, 77014, is also packaged in the hospital outpatient setting.

What is separately reportable is everything that happens after the catheters are in. The radiation itself is billed with the HDR remote afterloading codes 77770, 77771, and 77772. Brachytherapy isodose planning uses 77316 to 77318, basic dosimetry uses 77300, and simulation uses 77280 to 77290.

Same-date reporting with the lumpectomy needs more care. 19298 is not an add-on code, so pairing it with 19301 or 19302 on one date brings the multiple procedure rules into play. Check the current NCCI pair, then apply modifier 51 or 59 according to the edit indicator and payer policy.

The quietest denial driver is the split claim. Surgery bills the placement while radiation oncology bills the delivery, sometimes from a different department or site of service. When the two claims disagree on date, laterality, or channel count, one of them gets rejected. Dedicated claims management software can hold both legs against the same record.

Documentation that supports the claim

A clean 19298 claim needs the note to prove every clause of the descriptor. Auditors work through it phrase by phrase, so the record should too. Good practice management software features validate these elements before the claim is generated.

• The prior partial mastectomy: its date, its CPT code, and the pathology report with final margin status.
• Applicator and catheter count: how many tube and button catheters were placed, and how many channels will be loaded.
• Imaging guidance used: ultrasound or CT, plus how final catheter position was confirmed.
• Laterality and cavity location: which breast, which quadrant, clock position, and depth.
• Why interstitial rather than balloon: cavity size, skin bridge thickness, or seroma shape that ruled the balloon out.
• Treatment intent: partial breast irradiation, tumor bed boost, or re-irradiation, with the planned dose and fractionation.
• Who did what: the physician who placed the catheters and the physician who will deliver the treatment.

Practices tighten this up by tying the requirements to their pre-procedure checklists and digital intake forms. The note then captures each element while the procedure is fresh. Nothing has to be reconstructed weeks later for an audit response.

Common billing errors and audit triggers

The errors below are the ones that cost breast programs money on 19298. Most of them come from misreading what the code covers. The first two account for the majority of avoidable denials.

• Coding 19298 as a diagnostic marker placement. This is the most damaging error in the family. Clip, pellet, and wire localization belong to 19281-19288, and billing 19298 for one is a false claim.
• Using 19298 for a balloon applicator. MammoSite, Contura, and SAVI placements belong to 19296 or 19297. 19298 is reserved for multicatheter tube and button implants.
• Billing imaging guidance separately. Adding 76942 or 77002 next to 19298 contradicts the descriptor and gets the guidance line denied.
• Reporting 19297 on its own. As an add-on it needs 19301 or 19302 on the same claim, for the same patient and date.
• Billing more than one unit. One unit covers the whole implant, however many catheters were placed. Units per catheter is a recoupment waiting to happen.
• A delivery code that does not fit the implant. Channel count on the 77770-77772 line has to match the applicator described in the placement note.
• Omitting laterality. Payers that require LT or RT will pend or deny the claim without it.
• Leaving C1717 units blank. On the hospital claim the source is paid per source, so a missing unit count means unpaid radiation.

Cross-check anything unclear against AAPC Codify before you submit. Practices with structured EHR integration can turn each item above into a pre-submission edit. That’s far cheaper than working the denial afterward.

How Pabau supports breast brachytherapy billing

Most breast programs run this episode across two systems. Breast and plastic surgery teams document the implant in one place. Billing rebuilds the claim in another, and radiation oncology bills the delivery from a third. Every handoff is a chance for the date, the laterality, or the channel count to drift.

Practice management software like Pabau keeps the clinical record and the claim in one workflow. The operative note, the consent, the applicator details, and the codes all sit against the same patient timeline. Claim edit rules run before submission, so a missing laterality modifier or an unbundled guidance code is caught at the point of coding.

The result is fewer denials to work and a shorter path from procedure to payment. When a payer does ask for records, the documentation that supports the claim is already attached to it. Your team answers the request in minutes instead of rebuilding the episode from three systems.

Stop losing brachytherapy claims between departments

Pabau keeps the operative note, the codes, and the claim in one workflow. Placement and delivery lines stop disagreeing on the details that trigger denials.

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Conclusion

CPT code 19298 rewards coders who read the descriptor literally. It is a multicatheter interstitial brachytherapy implant, placed after a partial mastectomy, with imaging guidance already inside the code. Get the applicator right, keep the delivery codes consistent with it, and most of the denial risk disappears.

The remaining risk sits in the handoff between surgery, billing, and radiation oncology. Pabau keeps that episode on one record and validates code pairing and modifiers before you submit. To see how it would fit your program, book a demo.

Continue your research

Coding another breast surgery this week? CPT code 19305 covers radical mastectomy billing and how the breast surgery codes fit together.

Need the diagnostic localization codes instead? CPT code 19285 explains breast localization device placement and the 19281-19288 family.

Billing the reconstruction side of the same case? CPT code 19342 walks through delayed breast reconstruction with an implant or tissue expander.

Coding a breast biopsy rather than an implant? CPT code 19084 sets out the add-on rules for each additional lesion sampled.

Bringing AI into your clinical documentation? HIPAA compliant AI tools covers what a practice can safely put in front of a model.

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