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CPT 51525: Open Excision of Bladder Diverticulum

CPT code 51525 denotes open surgical excision of one or more bladder diverticula — focal herniations of the bladder lining through the muscular wall. This procedure is clinically significant for patients with symptomatic diverticula causing recurrent urinary tract infections, bladder outlet obstruction sequelae, hematuria, or impaired bladder emptying, and it carries implications for surgical resource use and payer coverage nationally.

Key payers addressed in the analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. The publication provides a national perspective on clinical context, coding considerations, and typical sites of service for 51525 as well as benchmarking where available. Readers will find concise clinical background on indications for bladder diverticulectomy, expected care settings (operating room, ambulatory surgery center, or inpatient hospital), and the types of documentation that commonly support medical necessity.

The piece also outlines what to expect from payer coverage discussions and highlights areas where policy updates or documentation practices may affect claims processing. Data not available in the input is explicitly noted where applicable. The content is intended for clinicians, billing professionals, and policy analysts seeking a clear, national overview of CPT code 51525 and its practical clinical and administrative implications.

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Billing Code Overview

CPT code 51525 describes the surgical incision into the urinary bladder with excision of one or more bladder diverticula. Bladder diverticula are congenital or acquired outpouchings of the bladder wall in which the lining protrudes through the muscular layer.

Service type: Surgical — open excision of bladder diverticulum.

Typical site of service: Inpatient or outpatient surgical setting, commonly performed in an operating room or ambulatory surgery center depending on clinical indication and patient status.

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CPT 51525: Open Excision of Bladder Diverticulum

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Get alerted when payer policies referencing 51525 are released or updated.

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Billing Code Overview

Service type: Surgical — open excision of bladder diverticulum.

Typical site of service: Inpatient or outpatient surgical setting, commonly performed in an operating room or ambulatory surgery center depending on clinical indication and patient status.

Clinical & Coding Specifications

Clinical Context

A typical patient is a middle-aged to older adult presenting with recurrent urinary tract infections, bladder outlet obstruction symptoms, or persistent post-void residuals. Diagnostic workup often includes urinalysis, urine culture, renal and bladder ultrasound or CT urogram, and cystoscopy, which identifies one or more bladder diverticula and evaluates nearby mucosa for inflammation or tumor. The urologist discusses risks and benefits with the patient; operative planning includes preoperative labs, anesthesia evaluation, and informed consent. In the operating room or ambulatory surgery center, under general or regional anesthesia, the surgeon makes a suprapubic or transvesical incision into the urinary bladder, identifies the diverticulum(s), excises them, examines the bladder for additional pathology, and closes the bladder wall in layers. Postoperative care includes monitoring urine output, managing catheter drainage (indwelling Foley or suprapubic catheter), pain control, infection prophylaxis as indicated, and follow-up imaging or cystoscopy to confirm healing and resolution of diverticular disease.

Coding Specifications

Modifier	Description	When to Use
`00`	No modifier	Standard reporting when no modifier applies
`11`	Principal physician of record	Use when the submitting physician is the primary surgeon responsible for the procedure
`22`	Increased procedural services	Use when the procedure required substantially greater effort or time than typical (document rationale)
`52`	Reduced services	Use when this procedure was partially reduced or not completed as planned
`53`	Discontinued procedure	Use when the procedure was started but terminated due to extenuating circumstances
`59`	Distinct procedural service	Use when another procedure performed in the same session is separate and distinct from the diverticulectomy
`62`	Two surgeons	Use when two surgeons work together as primary surgeons performing distinct portions of the procedure
`78`	Return to OR for related procedure by same physician	Use for an unplanned return to the operating room for a related procedure during the postoperative period
`79`	Unrelated procedure or service by same physician during postoperative period	Use when an unrelated procedure is performed during the global period
`LT`	Left side	Use if laterality is relevant and specified (e.g., single diverticulum on left lateral bladder wall)
`RT`	Right side	Use if laterality is relevant and specified (e.g., single diverticulum on right lateral bladder wall)
`QX`	Qualified non-physician practitioner	Use when a clinical nurse specialist, NP, or PA performs services within their scope under physician supervision
`QY`	Qualified non-physician assistant	Use when a physician assistant performs services incident to the physician's services per payer rules
`AS`	Physician assistant, nurse practitioner, or clinical nurse specialist services in primary care as delegated	Use according to payer policies when appropriate

Taxonomy Code	Specialty	Notes
208U00000X	Urology	Primary specialty performing bladder diverticulectomy
207K00000X	General Surgery	Some complex pelvic surgeries or open approaches may involve general surgeons
363A00000X	Anesthesiology	Provides anesthesia care for the operative procedure
207P00000X	Surgical Oncology	Engaged if malignancy within diverticulum is suspected or confirmed
2080P0203X	Pediatric Urology	Performs pediatric bladder diverticulectomy when the patient is a child

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`N32.89`	Other specified disorders of bladder	Used for non-specific bladder pathology including symptomatic diverticula when a more specific code is not applicable
`N31.9`	Neuromuscular dysfunction of bladder, unspecified	Associated when detrusor dysfunction contributes to diverticulum formation due to chronic high intravesical pressure
`N13.7`	Hydronephrosis with ureteral stricture, unspecified	May be present if bladder outlet obstruction from diverticulum or associated pathology causes upper tract dilation
`N20.0`	Calculus of kidney	Included because urinary stasis in diverticula can promote stone formation requiring evaluation or concurrent management
`N39.0`	Urinary tract infection, site not specified	Common presenting problem leading to evaluation and diverticulectomy due to recurrent infections localized to a diverticulum
`R33.9`	Retention of urine, unspecified	Chronic retention related to bladder outlet obstruction or diverticulum-related dysfunction prompting surgical correction
`C67.9`	Malignant neoplasm of bladder, unspecified	Relevant when diverticular mucosa harbors malignancy; may alter surgical approach and coding considerations

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`52000`	Cystourethroscopy, diagnostic, with or without collection of specimen(s) by brushing or washing	Diagnostic endoscopic evaluation often performed before or during planning for diverticulectomy
`52005`	Cystourethroscopy, with ureteroscopy and/or pyeloscopy	Performed if upper tract evaluation is needed or concurrent endoscopic procedures are indicated
`52332`	Cystourethroscopy, with fulguration of bladder lesion(s)	May be performed if small intradiverticular lesions are treated endoscopically instead of open excision
`51520`	Excision of bladder diverticulum, endoscopic or transurethral approach	Related technique when diverticulum is approached endoscopically rather than open transvesical excision (note: this code is for transurethral management)
`51701`	Irrigation of bladder, simple, washout and/or instillation	Performed postoperatively for clot evacuation or bladder irrigation if indicated
`52010`	Cystourethroscopy with biopsy of bladder mucosa	Used when biopsy of suspicious diverticular mucosa is performed during evaluation or at time of surgery

CPT 51500: Excision of Urachal Cyst or Sinus, ± Umbilical Hernia Repair

CPT-51520-BLADDER-NECK-EXCISION

CPT 51520: Excision of Bladder Neck to Relieve Obstruction

CPT-51530-BLADDER-TUMOR-EXCISION

CPT 51530: Incision for Removal of Bladder Tumor

CPT-51535-URETEROCELE-EXCISION-REPAIR-BLADDER-INCISION

CPT 51535: Ureterocele Excision or Repair via Bladder Incision

CPT-51550-PARTIAL-CYSTECTOMY-SIMPLE-CYSTECTOMY-BLADDER-RESECTION

CPT 51550: Partial (Simple) Cystectomy for Bladder Resection

CPT-51555-COMPLEX-PARTIAL-CYSTECTOMY-BLADDER-RESECTION

CPT 51555: Complex Partial Cystectomy for Bladder Resection

CPT-51565-BLADDER-RESECTION-AND-URETERAL-REIMPLANTATION

CPT 51565: Bladder Resection with Ureteral Reimplantation

CPT-51570-RADICAL-CYSTECTOMY-COMPLETE-BLADDER-REMOVAL

CPT 51570: Radical Cystectomy, Complete Urinary Bladder Removal

CPT-51575-RADICAL-CYSTECTOMY-PELVIC-LYMPHADENECTOMY

CPT 51575: Radical Cystectomy with Pelvic Lymph Node Dissection

CPT-51580-RADICAL-CYSTECTOMY-WITH-URINARY-DIVERSION

CPT 51580: Radical Cystectomy with Urinary Diversion

Showing 1–10 of 15

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Jul 29, 2026.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Jul 29, 2026.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Jul 29, 2026.

Published by

Trek Health powers OpenPayer with a leading commercial payer intelligence platform, seamlessly converting fragmented payer data into actionable insights for provider organizations.

Trek Health ingests and normalizes Transparency in Coverage data and payer policy updates to give provider organizations a clear view of how commercial reimbursement behaves across markets, payers, and services. Our platform transforms raw payer disclosures into structured intelligence that supports contract evaluation, payer negotiations, and service line strategy. By combining market benchmarks with ongoing policy visibility, Trek helps teams identify variability, risk, and opportunity in commercial reimbursement. The result is faster insight, stronger negotiating positions, and more informed financial decisions.

Clinical & Coding Specifications

Clinical Context

Coding Specifications

Modifier	Description	When to Use
`00`	No modifier	Standard reporting when no modifier applies
`11`	Principal physician of record	Use when the submitting physician is the primary surgeon responsible for the procedure
`22`	Increased procedural services	Use when the procedure required substantially greater effort or time than typical (document rationale)
`52`	Reduced services	Use when this procedure was partially reduced or not completed as planned
`53`	Discontinued procedure	Use when the procedure was started but terminated due to extenuating circumstances
`59`	Distinct procedural service	Use when another procedure performed in the same session is separate and distinct from the diverticulectomy
`62`	Two surgeons	Use when two surgeons work together as primary surgeons performing distinct portions of the procedure
`78`	Return to OR for related procedure by same physician	Use for an unplanned return to the operating room for a related procedure during the postoperative period
`79`	Unrelated procedure or service by same physician during postoperative period	Use when an unrelated procedure is performed during the global period
`LT`	Left side	Use if laterality is relevant and specified (e.g., single diverticulum on left lateral bladder wall)
`RT`	Right side	Use if laterality is relevant and specified (e.g., single diverticulum on right lateral bladder wall)
`QX`	Qualified non-physician practitioner	Use when a clinical nurse specialist, NP, or PA performs services within their scope under physician supervision
`QY`	Qualified non-physician assistant	Use when a physician assistant performs services incident to the physician's services per payer rules
`AS`	Physician assistant, nurse practitioner, or clinical nurse specialist services in primary care as delegated	Use according to payer policies when appropriate

Taxonomy Code	Specialty	Notes
208U00000X	Urology	Primary specialty performing bladder diverticulectomy
207K00000X	General Surgery	Some complex pelvic surgeries or open approaches may involve general surgeons
363A00000X	Anesthesiology	Provides anesthesia care for the operative procedure
207P00000X	Surgical Oncology	Engaged if malignancy within diverticulum is suspected or confirmed
2080P0203X	Pediatric Urology	Performs pediatric bladder diverticulectomy when the patient is a child

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`N32.89`	Other specified disorders of bladder	Used for non-specific bladder pathology including symptomatic diverticula when a more specific code is not applicable
`N31.9`	Neuromuscular dysfunction of bladder, unspecified	Associated when detrusor dysfunction contributes to diverticulum formation due to chronic high intravesical pressure
`N13.7`	Hydronephrosis with ureteral stricture, unspecified	May be present if bladder outlet obstruction from diverticulum or associated pathology causes upper tract dilation
`N20.0`	Calculus of kidney	Included because urinary stasis in diverticula can promote stone formation requiring evaluation or concurrent management
`N39.0`	Urinary tract infection, site not specified	Common presenting problem leading to evaluation and diverticulectomy due to recurrent infections localized to a diverticulum
`R33.9`	Retention of urine, unspecified	Chronic retention related to bladder outlet obstruction or diverticulum-related dysfunction prompting surgical correction
`C67.9`	Malignant neoplasm of bladder, unspecified	Relevant when diverticular mucosa harbors malignancy; may alter surgical approach and coding considerations

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`52000`	Cystourethroscopy, diagnostic, with or without collection of specimen(s) by brushing or washing	Diagnostic endoscopic evaluation often performed before or during planning for diverticulectomy
`52005`	Cystourethroscopy, with ureteroscopy and/or pyeloscopy	Performed if upper tract evaluation is needed or concurrent endoscopic procedures are indicated
`52332`	Cystourethroscopy, with fulguration of bladder lesion(s)	May be performed if small intradiverticular lesions are treated endoscopically instead of open excision
`51520`	Excision of bladder diverticulum, endoscopic or transurethral approach	Related technique when diverticulum is approached endoscopically rather than open transvesical excision (note: this code is for transurethral management)
`51701`	Irrigation of bladder, simple, washout and/or instillation	Performed postoperatively for clot evacuation or bladder irrigation if indicated
`52010`	Cystourethroscopy with biopsy of bladder mucosa	Used when biopsy of suspicious diverticular mucosa is performed during evaluation or at time of surgery

CPT 51500: Excision of Urachal Cyst or Sinus, ± Umbilical Hernia Repair

CPT-51520-BLADDER-NECK-EXCISION

CPT 51520: Excision of Bladder Neck to Relieve Obstruction

CPT-51530-BLADDER-TUMOR-EXCISION

CPT 51530: Incision for Removal of Bladder Tumor

CPT-51535-URETEROCELE-EXCISION-REPAIR-BLADDER-INCISION

CPT 51535: Ureterocele Excision or Repair via Bladder Incision

CPT-51550-PARTIAL-CYSTECTOMY-SIMPLE-CYSTECTOMY-BLADDER-RESECTION

CPT 51550: Partial (Simple) Cystectomy for Bladder Resection

CPT-51555-COMPLEX-PARTIAL-CYSTECTOMY-BLADDER-RESECTION

CPT 51555: Complex Partial Cystectomy for Bladder Resection

CPT-51565-BLADDER-RESECTION-AND-URETERAL-REIMPLANTATION

CPT 51565: Bladder Resection with Ureteral Reimplantation

CPT-51570-RADICAL-CYSTECTOMY-COMPLETE-BLADDER-REMOVAL

CPT 51570: Radical Cystectomy, Complete Urinary Bladder Removal

CPT-51575-RADICAL-CYSTECTOMY-PELVIC-LYMPHADENECTOMY

CPT 51575: Radical Cystectomy with Pelvic Lymph Node Dissection

CPT-51580-RADICAL-CYSTECTOMY-WITH-URINARY-DIVERSION

CPT 51580: Radical Cystectomy with Urinary Diversion

Showing 1–10 of 15

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Jul 29, 2026.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Jul 29, 2026.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Jul 29, 2026.

Published by

Trek Health powers OpenPayer with a leading commercial payer intelligence platform, seamlessly converting fragmented payer data into actionable insights for provider organizations.

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CPT 51525: Open Excision of Bladder Diverticulum

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Billing Code Overview

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CPT 51525: Open Excision of Bladder Diverticulum

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Billing Code Overview

Clinical & Coding Specifications

Clinical Context

Coding Specifications

Related Diagnoses

Related CPT Codes

Related Codes

References

Clinical & Coding Specifications

Clinical Context

Coding Specifications

Related Diagnoses

Related CPT Codes

Related Codes

References