CPT code 52353 – Ureteroscopy and pyeloscopy with lithotripsy

Key takeaways

CPT 52353 covers ureteroscopic or pyeloscopic lithotripsy. Ureteral catheterization is bundled in and cannot be billed separately.

When a ureteral stent is placed in the same ureter at the same session, bill 52356 instead of 52353 + 52332.

NCCI edits bundle 52332 into 52353 for the same side. Modifier 59 or XS applies only to a contralateral stent.

At the CY2026 conversion factor, 52353 pays about $345 and 52356 about $367 before locality adjustment.

Pabau’s claims management software flags NCCI bundling conflicts before submission, reducing denial rates for urology practices.

CPT code 52353: Official descriptor and procedure overview

CPT code 52353 is the American Medical Association-maintained code for “Cystourethroscopy, with ureteroscopy and/or pyeloscopy; with lithotripsy (ureteral catheterization is included).” A urologist passes a scope from the urethra up to the stone, then fragments it with energy, most often a holmium laser.

The parenthetical on ureteral catheterization carries a bundling rule. Billing 52005 separately alongside 52353 triggers an NCCI edit and a denial every time.

What the code includes and excludes

The AMA CPT Knowledge Base confirms that laser lithotripsy falls under 52353 and that ureteral catheterization is included. The holmium (Ho:YAG) laser is the dominant energy source for ureteroscopic lithotripsy. Coders sometimes ask whether the laser changes code selection. It does not, because 52353 covers lithotripsy whatever the energy modality.

• Included in 52353: cystourethroscopy, scope advancement to the stone, lithotripsy energy delivery, stone fragmentation, basket extraction of fragments, and ureteral catheterization
• Not included, bill separately where applicable: ureteral stent placement (52332 or 52356), fluoroscopy guidance (76000), and a separate diagnostic cystourethroscopy at a different site
• Cannot be unbundled: ureteral catheterization (52005), which is a hard NCCI bundle with no modifier exception

CPT 52353 vs 52356: Choosing the right code when a stent is placed

The most common coding error on ureteroscopy claims is billing 52353 + 52332 when a stent goes into the same ureter. 52356 already includes both the lithotripsy and the stent placement.

Adding 52332 alongside 52353 bills the stent twice. When the urologist fragments a stone and stents that same ureter at one session, 52356 is the only correct code. Two questions settle the line item, and the payment follows from the answers.

Billing 52332 alongside 52353: NCCI bundling rules

CPT 52332 covers cystourethroscopy with insertion of an indwelling ureteral stent. NCCI edits bundle it into 52353 when both are billed for the same ureter at the same session. The edit exists because 52356 is the designated combined code. Overriding the bundle takes a clinical distinction, not just an appended modifier.

Modifier 59 applies when the stent and the lithotripsy are performed on different sides. The X-modifiers are preferred where a payer accepts them: XS for a separate structure, XU for an unusual non-overlapping service.

The operative report has to state the laterality of each procedure. A note reading only “bilateral” does not say which ureter received which service, so it will not support the modifier. Stent placement on the same side as the lithotripsy is never separately reportable, which is the whole reason 52356 exists.

Where 52353 sits in the 52000-series

The 52000-series runs from basic cystoscopy through to complex stone management. Knowing where 52353 sits in that family prevents both under-coding and over-coding. The safest habit is to code from the operative findings rather than from the number your practice bills most often.

Ureteroscopic lithotripsy vs ESWL (50590)

CPT 50590 covers extracorporeal shock wave lithotripsy, a different approach from ureteroscopic lithotripsy. The treatment modality documented in the operative report drives code selection, and stone location alone does not. A ureteral stone treated with ESWL is 50590. The same stone fragmented under direct ureteroscopic vision is 52353.

Medicare reimbursement rates in the 2026 fee schedule

According to the CMS Physician Fee Schedule lookup tool, CPT 52353 carries a work RVU of 7.31 and a total RVU of 10.29. The total is the same in facility and non-facility settings, so the site of service does not change the Medicare allowance for this code.

Multiply the total RVU by the annual conversion factor to get the national allowance. CMS set the CY2026 conversion factor at $33.57 for qualifying APM participants and $33.40 for everyone else. That puts 52353 at roughly $345 and 52356 at roughly $367 before any locality adjustment.

Note: RVU values come from the CY2026 Medicare Physician Fee Schedule. Verify locality-adjusted rates in the CMS lookup tool before you submit, because figures differ by MAC jurisdiction. CMS updates them each January.

Documentation an auditor looks for

A clean claim for CPT 52353 depends on what the operative report captures. Auditors and payers look for five documentation elements when they review 52353 claims. Missing any one of them is grounds for denial or down-coding.

• Scope type and pathway: the report states that a cystourethroscopy was performed and that the ureteroscope or pyeloscope reached the stone
• Lithotripsy confirmation: explicit notation that energy was delivered and fragmentation achieved, including the modality, such as a holmium laser at 20W
• Stone location and laterality: right ureter, left ureter, or renal pelvis, which drives bilateral billing rules and ICD-10 selection
• Absence of a stent: when 52353 is billed, the note should confirm that no stent was placed
• Surgical findings: stone size, degree of fragmentation, and disposition of fragments, which support medical necessity

A urology superbill built around these five elements makes coder review faster and cuts the number of queries sent back to the surgeon. Mapping structured operative-note fields straight to CPT line items removes the manual transcription step where documentation errors enter the claim.

Prior authorization and payer-specific requirements

Medicare does not routinely require prior authorization for 52353, but Medicare Advantage plans and many commercial insurers do. The clinical criteria usually include imaging confirmation of the stone and a stone size above roughly 5 to 6 mm.

Plans also want evidence that conservative management failed or was contraindicated. Checking eligibility before scheduling confirms what each patient’s plan requires.

Compliance turns on two small habits. Record the authorization number on the claim, and make sure the authorized code matches what was actually performed.

If the patient needed 52356 but authorization covered 52353, obtain a revised authorization or the claim denies on code mismatch. Payer policies vary, so confirm the parameters with each plan.

Common denial reasons and how to appeal

The AAPC and CMS NCCI guidance identify six recurring denial patterns for 52353. Each has a specific correction path, and working through them in order is faster than appealing blind.

Tracking denial codes at the code level across 52353 claims shows where the process actually fails, whether in scheduling, documentation or coding. A monthly denial review by CPT code surfaces those patterns early.

ICD-10 codes that support medical necessity

The ICD-10-CM diagnosis code paired with 52353 is what establishes medical necessity. The primary diagnosis should reflect the stone location and laterality documented in the operative report. The CDC/NCHS ICD-10-CM tool lists the N20 category, which covers calculus of kidney and ureter by location.

How Pabau keeps 52353 claims out of the denial queue

Most urology billing teams catch a 52353 bundling error after the remittance comes back. The coder reads the op note and builds the claim. The NCCI edit then surfaces weeks later as a denial that has to be reworked.

Practice management software like Pabau moves that check to the point of claim build. Our claims management software runs the NCCI pairs as the line items go on. A 52332 sitting beside 52353 on the same ureter raises a flag before the claim leaves the practice.

The same check covers modifier requirements and the ICD-10 pairing, and every Pabau subscription includes it. Coders keep the judgment calls that need a clinician’s read, and the edit logic catches the pairs that get missed at volume.

Streamline urology billing with Pabau

Pabau’s claims management software checks NCCI edits, modifier requirements, and ICD-10 pairing before 52353 claims leave your practice. Fewer denials, faster reimbursement.

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Conclusion

Three decisions carry most of the denial risk on a 52353 claim. Whether a stent was placed, which ureter it went into, and whether the op note actually says so. Settle those three before the claim is built and the rest of the code set falls into place.

The allowance difference between 52353 and 52356 is only about $22. The rework is the expensive part. A denied claim costs staff time and delays payment, and some age past the filing window.

If your urology claims keep coming back on NCCI edits, the fix belongs upstream of the clearinghouse. Book a demo to see how Pabau checks 52353 claims before they are submitted.

Continue your research

Need to understand how medical claims move from practice to payer? Medical claims clearinghouse overview explains the submission pathway and how clearinghouse edits catch errors before adjudication.

Want a reference for denial code meanings on 52353 remits? Claim.MD clearinghouse guide covers CARC denial reason codes and how to read ERA remittance detail.

Looking to improve first-pass claim rates across your urology practice? Best medical billing software for US practices reviews the tools urology billing teams use to reduce rework.

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