51535

CPT 51535: Cystotomy for Excision, Incision, or Repair of Ureterocele

Primary Procedure

• 51535 - Cystotomy for excision, incision, or repair of ureterocele: Detailed Explanation: This is an open surgical procedure. The provider makes a lower abdominal incision to access and open the bladder (cystotomy). They locate the ureterocele (a ballooning or cystic dilation of the lower end of the ureter inside the bladder). The provider then cuts into (incises), completely removes (excises), or reconstructs the ureterocele. The ureter is often re-implanted into the bladder wall to prevent future vesicoureteral reflux. Finally, the bladder and abdominal incisions are closed, usually leaving a catheter in place for drainage.

ICD-10-CM Diagnosis Code(s) (Top 6 Options)

1. Q62.31 - Congenital ureterocele: The most common and specific diagnosis for this procedure, as most ureteroceles are congenital birth defects discovered in infancy or childhood.
2. N28.89 - Other specified disorders of kidney and ureter: Used if the ureterocele is acquired rather than congenital.
3. N13.2 - Hydronephrosis with renal and ureteral calculous obstruction: Used when a stone is trapped within the ureterocele causing upper tract obstruction and dilation.
4. N13.1 - Hydronephrosis with ureteral stricture, not elsewhere classified: Used if the ureterocele causes a stricture effect leading to hydronephrosis.
5. N32.89 - Other specified disorders of bladder: A secondary option if the primary pathology is documented as a bladder-wall defect related to the ureterocele insertion.
6. Q62.11 - Congenital occlusion of ureteropelvic junction: Often seen as a concomitant congenital abnormality requiring complex urinary tract reconstruction.

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CPT/HCPCS Code(s) & Alternatives

• 51535 - Cystotomy for excision, incision, or repair of ureterocele: Open approach.
• Alternative (Endoscopic) - 52300: Cystourethroscopy; with resection or fulguration of orthotopic [ureterocele], unilateral or bilateral. (Use if the procedure was done via scope through the urethra, not an open incision).
• Alternative (Endoscopic) - 52301: Cystourethroscopy; with resection or fulguration of ectopic ureterocele(s), unilateral or bilateral.

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Global Period

• 090: This is considered a major surgical procedure. The global surgical package includes the day before surgery, the day of the procedure, and 90 days of routine postoperative follow-up care.

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HCC Information

• HCC Impact: While CPT 51535 itself does not map to an HCC category, the underlying congenital diagnoses (like Q62.31) or resulting chronic kidney conditions (e.g., Chronic Kidney Disease resulting from prolonged hydronephrosis) may map to HCC risk adjustment categories. Always code the highest degree of chronic kidney disease (CKD) if present.

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Exclusives/Inclusives (Bundling & NCCI Edits)

Inclusives (Commonly Bundled - Do Not Bill Separately)

• 51040: Cystostomy, cystotomy with drainage (The opening of the bladder is the standard approach for 51535 and is strictly bundled).
• 52000: Diagnostic cystourethroscopy. Checking the bladder visually before or after the open procedure is integral to the surgery.
• 51701 / 51702: Insertion of a temporary indwelling bladder catheter (Foley) for post-operative drainage.
• Wound Closure: Standard layered closure of the abdominal wall.

Mutually Exclusives

• 52300 / 52301: Endoscopic ureterocele repair. If an endoscopic approach is attempted but fails and the surgeon converts to an open approach (51535), you can only bill the successful open procedure (51535).
• 51525: Cystotomy; for excision of bladder diverticulum. (If both a diverticulum and ureterocele are excised, verify NCCI edits and check if a -59 modifier is appropriate based on distinct anatomic sites, but they are often mutually exclusive).

Assistant Payable

• Yes: Assistant at surgery (Modifier -80, -82, or -AS) is typically payable. Reconstructive bladder surgery often requires an assistant for retraction and complex suturing.

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Detailed Clinical Context & Documentation Tips

• Open vs. Endoscopic: The most common coding error with ureteroceles is confusing the open approach (51535) with the transurethral endoscopic approach (52300/52301). Ensure the operative report clearly states an abdominal incision was made.
• Ureteral Reimplantation: If the provider also performs a complex ureteral reimplantation (e.g., CPT 50780 Ureteroneocystostomy), check current NCCI edits. Repairing the ureterocele (51535) inherently involves dealing with the ureter’s insertion point, but extensive reimplantation of the ureter higher up the bladder wall may warrant separate coding with a -51 modifier depending on payer rules.
• Bilateral vs. Unilateral: CPT 51535 does not specify unilateral or bilateral in its descriptor. If performed bilaterally, append modifier -50.