51565

⚕️CPT Code 51565 - Cystotomy, With Repair of Ureterocele

Quick Reference

Descriptor: Cystotomy, with repair of ureterocele ¹
Global Period: 90 days ²
Assistant Surgeon: Payable with modifiers -80, -81, -82, -AS ³
wRVU: 16.31 | Total RVU: 28.85 (Facility) ⁴
NCCI Status: Bundles diagnostic cystoscopy 52000; modifier indicator “1” for distinct procedures ⁵
Approach: Open Surgical (Incision)

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📋 Code Description & Clinical Context

51565 describes an open surgical procedure involving a cystotomy (incision into the urinary bladder) to repair a ureterocele ¹. A ureterocele is a congenital or acquired cystic dilation of the distal ureter as it enters the bladder. This condition can cause obstruction, reflux, infection, or stone formation, necessitating surgical intervention to unroof, excise, or reconstruct the ureterocele and reimplant the ureter if necessary ⁶.

Key Clinical Indications:

• Symptomatic ureterocele causing obstruction or hydronephrosis
• Recurrent urinary tract infections (UTIs) associated with ureterocele
• Vesicoureteral reflux (VUR) secondary to ureterocele
• Stone formation within the ureterocele
• Failure of endoscopic management (e.g., puncture or incision)

Approach Specificity

This code represents an open approach. If the procedure is performed via cystourethroscopy (endoscopic), report 52341 (Cystourethroscopy, with incision of ureterocele) or 52342 (with reimplantation) instead ⁷. Laparoscopic repair may also be reported with unlisted codes or specific laparoscopic ureteral codes depending on payer policy.

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🌲 Code Hierarchy / Tree

Surgery (10000-69990)
└─ Urinary System (50000-55999)
   └─ Bladder (51000-51999)
      └─ Incision (51501-51597)
         ├─ 51501 Cystotomy, with removal of foreign body
         ├─ 51550 Cystotomy, with excision of urachal cyst
         ├─ 51555 Cystotomy, with excision of bladder diverticulum
         └─ 51565 Cystotomy, with repair of ureterocele ← THIS CODE

Parent Category: Incision Procedures on the Bladder ⁸
Endoscopic Counterpart: 52341 (Incision of ureterocele) or 52342 (Ureteroscopy with reimplantation) ⁷
Related Procedure: 51560 (Cystotomy, with excision of bladder tumor)

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💰 Reimbursement & Valuation

Component	Facility	Non-Facility	Notes
Work RVU	16.31	16.31	Physician effort component 4
Practice Expense RVU	9.86	11.50	Overhead/equipment (higher in office) 4
Malpractice RVU	2.68	2.68	Liability component 4
Total RVU	28.85	30.49	Base for payment calculation
Global Period	90 days	90 days	Major surgery; includes 1 pre-op + surgery day + 90 post-op days 29

Assistant Surgeon Payable: Yes

• Report with modifiers: -80 (Assistant Surgeon), -81 (Minimum Assistant), -82 (Assistant when resident unavailable), or -AS (PA/NP/CNS assistant) ³
• Medicare Status Indicator: “1” (Payment permitted for assistant)
• Reimbursement typically 16 - 25% of primary surgeon fee depending on payer policy

Medicare Payment Estimate: National average ~$1,050-$1,150 (Physician Fee), Facility fees separate ¹⁰

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🚫 Includes / Excludes & NCCI Guidance

✅ Includes

• Open incision into the bladder (cystotomy)
• Identification of ureterocele
• Incision, excision, or unroofing of ureterocele
• Repair of bladder mucosa and ureteral orifice
• Reimplantation of ureter if performed through same incision (often bundled)
• Cystoscopy performed to aid in identification or closure (bundled) ⁵
• Placement of suprapubic tube or urethral catheter (bundled)
• Drain placement (e.g., Penrose or Jackson-Pratt)

❌ Excludes / Bundled Per NCCI

• Diagnostic cystoscopy 52000 (bundled when performed for same reason) ⁵
• Endoscopic incision of ureterocele 52341 (different approach, do not report both)
• Endoscopic reimplantation 52342 (different approach)
• Cystotomy for other purposes (e.g., stone removal) unless distinct separate lesion
• Biopsy of bladder 52204 (bundled if same lesion)

NCCI Edit Critical Note

Diagnostic cystoscopy 52000 is bundled into 51565 with a modifier indicator of “0” in many contexts ¹¹. It cannot be billed separately if used solely to facilitate the open procedure. However, if a distinct diagnostic cystoscopy is performed for a separate indication (e.g., evaluating hematuria unrelated to the ureterocele), modifier 59 may be applicable if the edit allows (Indicator “1”) ⁵.

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🏥 MS-DRG Assignment (Inpatient Facility)

If performed in an inpatient setting (common for complex reconstructions or pediatric cases):

Scenario	MS-DRG	Description
Primary procedure: Kidney & Urinary Tract Procedures for Non-Malignancy with MCC	689	Highest severity/complexity 12
Primary procedure: Kidney & Urinary Tract Procedures for Non-Malignancy with CC	690	Moderate complexity 12
Primary procedure: Kidney & Urinary Tract Procedures for Non-Malignancy without CC/MCC	691	Baseline complexity 12

Note

Inpatient admission must meet severity criteria. Simple ureterocele repairs are increasingly performed outpatient or via endoscopy ¹³.

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🏷️ Common ICD-10-CM Diagnosis Codes

Primary Diagnosis Options

ICD-10-CM Code	Description	HCC Status*
N13.5	Kinking and stricture of ureter without hydronephrosis (includes ureterocele)	❌ Not HCC
Q64.3	Other congenital malformations of bladder and ureter (Congenital ureterocele)	❌ Not HCC
N28.89	Other specified disorders of kidney and ureter	❌ Not HCC
N13.4	Hydroureter	❌ Not HCC
N13.2	Hydronephrosis with renal and ureteral calculous obstruction	❌ Not HCC
N39.0	Urinary tract infection, site not specified	❌ Not HCC
C67.9	Malignant neoplasm of bladder, unspecified	✅ HCC (Cancer)

• HCC Status: Hierarchical Condition Category mapping for Medicare Advantage risk adjustment. Ureterocele and congenital anomaly codes (N13.5, Q64.3) are not HCCs in current CMS-HCC models ¹⁴¹⁵. They are considered acute/episodic or congenital without chronic systemic impact. Chronic Kidney Disease (CKD) codes (e.g., N18.3-, N18.4) are HCCs and should be reported if documented.

Supporting/Comorbid Codes (Document When Applicable)

• N18.30 Chronic kidney disease, stage 3 unspecified (HCC applicable)
• N18.4 Chronic kidney disease, stage 4 (HCC applicable)
• N18.5 Chronic kidney disease, stage 5 (HCC applicable)
• Z87.440 Personal history of urinary (tract) calculi
• R39.15 Urinary retention (if applicable)

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✏️ Modifiers Guidance

Modifier	Use Case for 51565	Payable?
-50	Bilateral Procedure: Not applicable (Bladder is a single midline organ)	❌ Do not use
-51	Multiple Procedures: when performed with other distinct procedures (e.g., hernia repair)	✅ Subject to multiple procedure reduction
-59	Distinct Procedural Service: if cystoscopy is distinct (rarely allowed)	⚠️ Verify NCCI edit indicator first
-80 / -81 / -82 / -AS	Assistant Surgeon services	✅ Payable per Medicare policy 3
-22	Increased Procedural Services: ureterocele exceptionally large, inflamed, or adherent	✅ If documentation supports & NCCI allows
-53	Discontinued Procedure: terminated due to patient risk (e.g., inability to isolate ureterocele)	✅ With operative note detail
-LT / -RT	Left Side / Right Side: Not applicable (Midline organ, though ureter is paired)	⚠️ Use only if specifying ureter side in diagnosis

Modifier -50 Warning

Do not report modifier -50 with 51565. The bladder is not a paired organ. Even if bilateral ureteroceles are repaired, the procedure is on the bladder. Reporting -50 may result in denial ¹⁶.

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📝 Coding Examples

✅ Example 1: Standalone Open Ureterocele Repair

Scenario: 35 y/o F with recurrent UTIs and obstruction. Imaging shows large left ureterocele. Surgeon performs open suprapubic cystotomy, incises ureterocele, excises redundant tissue, repairs bladder mucosa. Cystoscopy performed to ensure patency.
Report:

• 51565 (Cystotomy, with repair of ureterocele)
• N13.5 (Kinking and stricture of ureter without hydronephrosis)
• N39.0 (Urinary tract infection)
  Rationale: Procedure matches descriptor. Cystoscopy is bundled ¹⁷.

❌ Example 2: Billing Cystoscopy Separately (Incorrect)

Scenario: Same as Example 1. Surgeon bills 51565 and 52000 (Cystoscopy).
Report: 51565 + 52000
Rationale: Incorrect. 52000 is bundled into 51565 when performed to facilitate the open procedure ⁵.

⚠️ Example 3: Increased Procedural Services

Scenario: Patient has prior pelvic surgery. Ureterocele is densely adherent to bladder wall. Dissection takes significantly longer than typical.
Report:

• 51565--22
• N13.5
• Operative note details adhesions, time, and complexity
  Rationale: Modifier -22 may be appropriate when work is substantially greater than typically required ¹⁸.

✅ Example 4: Assistant Surgeon Participation

Scenario: Complex reconstruction. Assistant surgeon provides retraction and suturing assistance.
Report:

• Primary: 51565
• Assistant: 51565--80
• Diagnosis: N13.5
  Rationale: Assistant surgeon services are payable for 51565; document assistant’s specific contributions ³.

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🔍 Documentation Essentials for Support

To support 51565 and mitigate audit risk, operative documentation should include:

1. Approach: Explicitly state “open” approach (suprapubic or lower abdominal incision).
2. Indication: Reason for repair (infection, obstruction, reflux).
3. Procedure: Describe cystotomy, identification of ureterocele, incision/excision, and repair.
4. Cystoscopy: Mention cystoscopy was performed (do not bill separately, but document it was done).
5. Complexity: Note any adhesions, inflammation, or proximity to other structures.
6. Closure: Describe method of bladder closure (e.g., two-layer closure).
7. Drains/Catheters: Document placement of Foley or suprapubic tube.
8. Ureteral Patency: Confirm ureteral function post-repair.

Ureteral Patency

Document confirmation of ureteral patency (e.g., via cystoscopy or stent placement) to support successful repair and medical necessity.

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⚠️ Common Pitfalls & Audit Risks

Pitfall	Consequence	Prevention
Reporting 52000 with 51565	Claim denial (Bundled)	Remember cystoscopy is included in descriptor 5
Using 51565 for endoscopic repair	Incorrect coding (Upcoding/Downcoding)	Use 52341 or 52342 for endoscopic approach 7
Using Modifier 50	Denial (Invalid for midline organ)	Remove modifier 50 for bladder procedures 16
Failing to document CKD status	Lost HCC Risk Adjustment	Document Chronic Kidney Disease stage if applicable (e.g., N18.30) 14
Insufficient closure documentation	Query/Denial	Ensure operative note states bladder was closed securely 17

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🔗 Related Codes & Crosswalks

Code Type	Code	Relationship to 51565
CPT®	52341	Cystourethroscopy, with incision of ureterocele (Endoscopic)
CPT®	52342	Cystourethroscopy, with reimplantation of ureter (Endoscopic)
CPT®	51555	Cystotomy, with excision of bladder diverticulum (Open)
CPT®	51560	Cystotomy, with excision of bladder tumor (Open)
CPT®	52000	Cystoscopy, diagnostic (bundled)
ICD-10-PCS	0TB90ZZ	Excision of Bladder, Open Approach (inpatient procedure coding)
HCPCS	None directly	No specific HCPCS Level II code crosswalk

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¹ AMA CPT 2024 Professional Edition
² CMS Global Surgery Factsheet
³ Medicare Claims Processing Manual Ch. 12
⁴ CMS Medicare Physician Fee Schedule 2024
⁵ CMS NCCI Policy Manual 2024
⁶ AUA Guidelines on Ureterocele Management
⁷ NIH VSAC CPT Hierarchy
⁸ NIH VSAC CPT Hierarchy
⁹ Noridian Medicare Local Coverage Determinations
¹⁰ Payer Price Fee Schedule 2026
¹¹ AAPC NCCI Edit Resources
¹² CMS MS-DRG Manual v41.0
¹³ CMS Two-Midnight Rule Guidance
¹⁴ CMS-HCC Model V28 Documentation
¹⁵ Find-A-Code HCC Mapping Tool
¹⁶ Coding Mastery Modifier Guidelines
¹⁷ AAPC Coding Cystotomy Procedures
¹⁸ Medicare Claims Processing Manual Ch. 12