CPT code 55875 – Prostate brachytherapy billing guide

Key takeaways

CPT code 55875 covers transperineal needle or catheter placement into the prostate. The radiation oncologist bills the radiation source application as a separate step.

C61 (malignant neoplasm of prostate) is the primary supported ICD-10 diagnosis. Payer LCDs add staging, PSA and Gleason criteria on top of it.

Modifier 62 applies when a urologist and radiation oncologist co-perform the procedure. Verify that each payer accepts it rather than modifier 66.

Medicare’s CY2026 national payment for 55875 is about $687.72, from 20.59 total RVUs at the non-QP conversion factor.

Pabau’s claims management, part of the practice software we build, scrubs each claim for missing or invalid details before submission.

CPT code 55875: Official descriptor and procedure overview

CPT code 55875 describes transperineal placement of needles or catheters into the prostate for interstitial radioelement application, with or without cystoscopy. The American Medical Association (AMA), which maintains the CPT code set, assigns it to the surgical treatment step of prostate brachytherapy. Also, the step is performed through the perineum under scan guidance.

Also, the code sits within the Male Genital System group of CPT’s Surgery section (codes 54000-55899). First, it is billed by the urologist or surgeon who places the needles or catheters. In contrast, the radiation oncologist bills the brachytherapy source codes (often from the 77000-series).

Because 55875 is a surgical code, it never carries the radiation oncology work. As a result, two teams bill the same patient visit from two angles, and their codes must stay apart.

Who reports 55875

So each biller in the session reports its own line, whether the case uses LDR seeds or HDR catheters.

• Urologist (surgeon): Reports CPT 55875 for the needle/catheter placement step
• Radiation oncologist: Reports 77778 (interstitial radiation source application, complex) for LDR, or 77770-77772 for HDR, plus the isodose planning codes (77316-77318)
• Radiologist or doing doctor: Reports 76965 for ultrasound guidance when noted on its own
• Facility: Reports the brachytherapy source C-codes and receives its own APC payment

What the procedure involves: Steps that drive your notes

The transperineal approach follows a fixed sequence. In addition, each step maps to a detail the claim depends on. If an op report skips one, it invites a medical-necessity denial.

1. Patient setup: Lithotomy position with perineal access confirmed. Note patient prep and setup in the op note.
2. Scan setup: Transrectal ultrasound (TRUS) or fluoroscopic guidance is in place. Note the scan type and supervision to support its own 76965 claim for ultrasound guidance.
3. Template-guided needle insertion: Needles or catheters placed transperineally into preset coordinates within the prostate. Also, the op report must state the number of needles and where each one sits.
4. Cystoscopy (if performed): Not always done; 55875 bundles cystoscopy when performed during the same session. So do not add cystoscopy CPT codes.
5. Check scan: A scan after the needles go in confirms their position. Include in the notes for dosimetry planning support.

The op report must confirm the transperineal approach clearly. For example, a report that notes only “brachytherapy performed” without listing the route falls short for most Medicare Administrative Contractor (MAC) reviews.

LDR vs HDR brachytherapy: Which approach 55875 covers

CPT code 55875 covers the needle or catheter placement step for both low-dose-rate (LDR) and high-dose-rate (HDR) prostate brachytherapy. However, the distinction between types changes which linked codes follow, not whether 55875 itself applies.

Practices doing HDR work should check current National Correct Coding Initiative (NCCI) edits before billing. This matters because bundling links between 55875 and the HDR codes change with CMS update cycles.

CPT 55875 vs 55876: How to tell the codes apart

CPT 55875 covers transperineal needle or catheter placement for interstitial radioelement application (brachytherapy). CPT 55876 covers placement of interstitial devices, such as fiducial markers or dosimeters, for radiation therapy guidance (via needle, any approach). The two codes share the word “interstitial” but serve two goals, and mixing them up draws payer checks.

A useful shorthand: If the radioactive source goes in during the session, use 55875. If the procedure places a marker so that outside radiation can be aimed correctly later, use 55876.

Linked codes billed with 55875

First, CPT code 55875 covers needle or catheter placement only. The radiation source application, scan guidance, and dosimetry planning are each billed on their own lines when performed and noted. Check current NCCI edits before billing any linked code, since CMS revises the bundling pairs often.

ICD-10 codes that support medical necessity

Most Medicare Local Coverage Determinations (LCDs) covering prostate brachytherapy require C61 as the main diagnosis on a 55875 claim. So billing without it is the most direct path to a medical-necessity denial.

Payer LCDs also specify more criteria beyond the diagnosis code. For example, most require the Gleason score, PSA level, and staging (often T1c-T2c for LDR brachytherapy monotherapy). Then check the specific LCD for your MAC jurisdiction before filing. Part B MACs that process these claims include Novitas Solutions (JH/JL), CGS Administrators (J15), NGS (J6/JK) and WPS (J5/J8).

Medicare reimbursement and 2026 rates

Overall, Medicare pays CPT code 55875 under the Medicare Physician Fee Schedule (MPFS), adjusted for the practice’s locality. The CMS Physician Fee Schedule lookup tool is the authoritative source for current rates. Also, the figures below are the 2026 national base values from the CMS relative value file.

Because CMS sets no second non-facility rate for 55875, the professional payment is the same in a hospital, an ASC or an office. Meanwhile, the facility receives its own Ambulatory Payment Classification (APC) payment for the technical side. The CMS PFS relative value files list the work, practice expense and malpractice RVUs for each code.

After the session, practices should reconcile expected and actual payments by reviewing electronic remittance advice (ERA) files. ERAs show the CARC reason code when a claim is reduced or rejected. As a result, reading them quickly exposes a repeated billing error before it spreads across more claims.

Prior authorization: What payers require before approving 55875

First, prior auth rules for CPT 55875 vary widely by payer and plan. Traditional Medicare (Parts A and B) does not require prior auth for prostate brachytherapy, but Medicare Advantage plans and most private payers do. Treat each non-traditional-Medicare claim as needing prior auth until that specific plan confirms it does not.

Notes that often support medical necessity in a prior auth request include:

• Biopsy lab report showing prostate adenocarcinoma with Gleason score
• PSA level at time of diagnosis and most recent pre-treatment value
• Staging notes (T-stage, N-stage, M-stage per NCCN or AUA guidelines)
• Radiation oncology and urology consultation notes showing the plan to use implants
• Prostate volume assessment (TRUS-based volumetry), as some LCDs set an upper volume threshold

If a payer’s LCD includes comparative-effectiveness criteria, note why implants were chosen over EBRT, radical prostatectomy or active surveillance. Also, that rationale belongs in the record as part of medical billing compliance. Private prior auth often takes 5-10 business days, and Medicare Advantage plans vary. So submit the request at least two weeks before the session date.

Modifiers used with 55875

Correct modifier use on CPT 55875 claims prevents payment reductions and avoids team-surgery audit triggers. So four modifiers apply most often to this code.

When using modifier 62, both the urologist’s and radiation oncologist’s claims must carry modifier 62, and each must note their own part. Still, a single shared op note may not satisfy all payer rules for the two-surgeon modifier.

Top denial reasons and how to fix them

The denials below trace to office and charting problems that a billing team can fix before filing. In addition, each fix follows the root-cause approach used in denial management.

• Missing prior auth: Private and Medicare Advantage plans routinely deny 55875 when no auth number appears on the claim. Fix: Confirm auth rules per plan and attach the auth number in field 23 (CMS-1500) or the equivalent EDI segment before filing.
• Incorrect ICD-10 pairing: Claims submitted without C61 as the main diagnosis, or with only a secondary code, fail LCD criteria. Fix: Always lead with C61; extra codes (staging, PSA level, co-morbidities) follow.
• NCCI bundling with linked codes: Billing 55875 with a linked code that NCCI edits bundle into it, without a supporting modifier, causes a line-level denial. Fix: Run a CCI edit check before filing; check the modifier is correct, not just appended to bypass the edit.
• Thin op-report notes: Denials citing “procedure not backed by records” often trace to a thin op note. For example, it may omit the needle count, the coordinates or an explicit statement of the transperineal approach. Fix: Instead, use a structured implant note template that prompts each required part.
• Place-of-service mismatch: Billing POS 11 (office) for a procedure performed at an ASC (24) or hospital outpatient department (22) applies the wrong fee schedule. As a result, that can trigger a payment error or denial. Fix: Match the POS code to the service location on each claim.
• Coding 55875 by the radiation oncologist: 55875 belongs to the urologist/surgeon doing needle placement. The radiation oncologist bills 77778. If you cross these, you get a duplicate-service denial. Fix: Confirm billing responsibility during pre-procedure coordination.

Review the medical billing denial codes for the full CARC/RARC reference. Then trace each denial to the charting or coding error behind it.

Records checklist for a clean claim

So the following records are required for a 55875 claim to survive payer review. If any one is missing, the payer can request records or deny the claim outright. Use this as a pre-filing checklist before each treatment case is coded and billed. For practical guidance on building a clean claim, review how each part maps to a CMS-1500 field or EDI loop.

• Op report: Confirms transperineal approach clearly; states number of needles or catheters placed and their locations within the prostate
• Scan guidance report: TRUS or fluoroscopy report showing real-time scan supervision and interpretation (supports 76965 billing when applicable)
• Radiation oncology treatment plan: Pre-procedure dosimetry plan listing seed activity, target volume, and isodose objectives
• Pre-surgery staging workup: Biopsy results (Gleason score), PSA value, and T-stage notes within the required timeframe for the payer’s LCD
• Prior auth approval: Auth number and effective date from the payer, noted in the patient record and on the claim form
• Cystoscopy notation: If cystoscopy was performed, it must be noted in the op report as part of the 55875 visit (do not code it on its own)
• Place of service: Written confirmation of the facility where the session took place, matching the POS code on the claim
• Both providers’ notes (if modifier 62): Separate attestations from the urologist and radiation oncologist describing their own contributions

How Pabau keeps 55875 claims complete before filing

A single treatment session produces claim lines from the urologist, the radiation oncologist, imaging and the facility. Each line needs its own auth number, diagnosis pointer and place-of-service code before it goes out.

Pabau’s claims management software scrubs each claim for missing or invalid details before filing. Your team corrects a flagged 55875 claim before a payer ever sees it.

Also, US practices submit through Claim.MD, Pabau’s integrated US clearinghouse partner, which reaches thousands of US payers. It runs real-time eligibility checks before the session date. Once payers respond, Pabau brings ERA files back against the claims they settle and shows the reason for a rejected claim.

Streamline prostate brachytherapy billing

Pabau’s claims management scrubs each CPT 55875 claim for missing or invalid details before submission. US claims then go to thousands of payers through Claim.MD.

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Conclusion

Overall, treat 55875 as one line in a claim set that spans up to four billers. The urologist’s claim holds up when the op note names the transperineal approach and needle count, and C61 leads the diagnoses.

Before the first case, agree with radiation oncology and the facility on who reports 77778 or 77770-77772, 76965 and the source C-codes. If you settle that once, you prevent the duplicate-service denials that would surface in the ERA weeks later.

Pabau routes 55875 claims through the Claim.MD clearinghouse with claim scrubbing and real-time eligibility checks. It brings ERA files back into Pabau against the claims they settle, and shows the reason for a rejected claim. Book a demo to see that workflow on a prostate brachytherapy claim.

Continue your research

Need to track denial codes across multiple 55875 claims? What is revenue cycle management explains how to build a denial tracking workflow that catches repeat patterns early.

Submitting claims through a clearinghouse for the first time? Claim.MD clearinghouse overview walks through how a claim moves from your practice to the payer.

Billing the companion fiducial placement? CPT code 55876 covers the descriptor, documentation and payment rules for prostate fiducial markers.

Coding the diagnosis behind the procedure? ICD-10 code C61 explains when to report malignant neoplasm of prostate as the principal diagnosis.

Preparing your billing team for a payer audit? Superbill creation guide covers how to structure a superbill for surgical procedures that carry multiple companion codes.

Frequently asked questions