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CPT 51555: Complex Partial Cystectomy for Bladder Resection

CPT code 51555 denotes a complex partial cystectomy — a surgical removal of part of the urinary bladder performed when tumor location, prior radiation, or previous surgeries increase procedural complexity. This code is clinically significant because it captures high-acuity urologic surgical care for bladder cancer and distinguishes more complex resection work from routine bladder procedures. Accurate use of the code affects clinical documentation, hospital surgical case mix, and national monitoring of cancer-related surgical services.

Key payers in national analyses include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find context on clinical indications and typical settings for the code, how payers commonly cover complex bladder resections, and which benchmarks and policy topics are relevant for high-complexity urologic surgery. The publication summarizes coding implications for hospitals and surgical teams, highlights payer coverage considerations, and outlines where to look for relevant policy or reimbursement updates.

This summary is intended to inform billing specialists, surgical service line managers, and health policy analysts about the clinical role of CPT code 51555, common sites of service, and the payer landscape relevant to complex partial cystectomy nationally.

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Billing Code Overview

CPT code 51555 describes a complex partial cystectomy, a surgical procedure in which a provider removes part of the urinary bladder. The procedure is designated “complex” when complexity arises from prior radiation therapy, previous surgery, or when the tumor or diseased tissue is in a difficult-to-reach location. The primary clinical indication for this service is treatment of bladder cancer.

Service type: Surgical resection of part of the urinary bladder (complex partial cystectomy)
Typical site of service: Hospital operating room or inpatient surgical setting

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CPT 51555: Complex Partial Cystectomy for Bladder Resection

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Get alerted when payer policies referencing 51555 are released or updated.

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Billing Code Overview

Service type: Surgical resection of part of the urinary bladder (complex partial cystectomy)
Typical site of service: Hospital operating room or inpatient surgical setting

Clinical & Coding Specifications

Clinical Context

A 68-year-old male with muscle-invasive urothelial carcinoma of the bladder presents after prior pelvic radiation for prostate cancer and a prior transurethral resection of bladder tumor (TURBT). Imaging and cystoscopic evaluation demonstrate a recurrent, invasive tumor involving the lateral bladder wall and dome with dense scar tissue from prior surgery and radiation. The surgical team schedules a complex partial cystectomy for bladder preservation because the lesion is solitary and located in a surgically accessible region but complicated by adhesions and altered anatomy from prior treatments.

The clinical workflow includes preoperative staging with CT or MRI pelvis, crossmatch and preop labs, anesthesia evaluation, discussion of surgical consent outlining possible conversion to radical cystectomy, intraoperative exploration, resection of the involved bladder segment with wide margins, possible ureteral reimplantation if trigone involvement is suspected, specimen submission to pathology, and postoperative inpatient monitoring for urinary leak, infection, and oncologic surveillance planning.

Coding Specifications

Modifier	Description	When to Use
`22`	Increased procedural services	Use when the operation required substantially greater effort or time due to prior radiation, dense adhesions, or extensive dissection beyond typical for `51555`.
`23`	Unusual anesthesia	Use if general anesthesia was contraindicated and an unusual anesthetic technique was required.
`26`	Professional component	Use when reporting the surgeon's professional component separate from technical facility charges if payer requires split billing.
`50`	Bilateral procedure	Not routinely applicable; include only if bilateral operative sites are documented and payer recognizes for this code.
`51`	Multiple procedures	Use when `51555` is performed with other distinct procedures during the same operative session.
`52`	Reduced services	Use when the procedure was attempted but substantially reduced or abbreviated.
`53`	Discontinued procedure	Use when the procedure was started but terminated due to extenuating circumstances prior to completion.
`62`	Two surgeons	Use when two surgeons of different specialties work together as primary surgeons performing distinct portions of the complex cystectomy.
`63`	Procedure performed on infants less than 4 kg	Rare for bladder procedures; include only if applicable by patient weight.
`78`	Unplanned return to OR	Use for an unplanned return to the operating room related to the original procedure during the postoperative period.
`80`	Assistant surgeon	Use when a surgical assistant is documented and payer requires separate reporting.
`81`	Minimum assistant surgeon	Use when a minimal assistant contribution is documented.
`82`	Assistant surgeon (when qualified resident not available)	Use when an assistant surgeon is required because a qualified resident is not available.
`TC`	Technical component	Use when reporting only the facility/technical component of the service if billed separately.
`AS`	Physician assistant, nurse practitioner, or clinical nurse specialist	Use to indicate these non-physician advanced practitioners performed diagnostic or therapeutic services under appropriate state law when applicable.

Taxonomy Code	Specialty	Notes
363A00000X	Urology	Primary specialty performing cystectomy procedures.
208800000X	General Surgery	Performs complex pelvic resections and may assist for extensive reconstruction.
207L00000X	Surgical Oncology	Provides oncologic surgical expertise for tumor resection planning and margins.
208000000X	Colon & Rectal Surgery	May assist when pelvic adhesions or rectal involvement require expertise.
207P00000X	Thoracic Surgery	Rarely involved; list included for institutional multidisciplinary teams when upper urinary tract involvement exists.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`C67.0`	Malignant neoplasm of trigone of bladder	Tumors in the trigone may require partial cystectomy with possible ureteral reimplantation.
`C67.1`	Malignant neoplasm of dome of bladder	Lesions at the dome can be amenable to partial cystectomy depending on extent.
`C67.2`	Malignant neoplasm of lateral wall of bladder	Common site for solitary muscle-invasive tumors treated with partial cystectomy in select patients.
`C67.7`	Malignant neoplasm of overlapping sites of bladder	Tumors spanning adjacent bladder sites that may complicate resection.
`D09.0`	Carcinoma in situ of bladder	CIS may influence surgical planning if focal high-grade disease is present.
`N32.0`	Bladder neck obstruction	May be present concomitantly and affect surgical approach and reconstruction.
`T66.XXXA`	Radiation sickness, unspecified, initial encounter	Prior pelvic radiation can cause tissue fibrosis and complicate cystectomy dissection; code selection must follow coding guidance for radiation effects if applicable.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`51045`	Cystostomy, suprapubic; initial placement	May be performed preoperatively or postoperatively for urinary drainage if prolonged bladder diversion is required.
`51701`	Insertion of temporary indwelling bladder catheter; simple (e.g., Foley)	Commonly performed intraoperatively or postoperatively for bladder drainage after partial cystectomy.
`50590`	Lithotripsy, shock wave (ESWL) percutaneous nephrolithotomy (PCNL) not elsewhere classified	Not typical but listed for completeness when simultaneous upper tract procedures are required; include only if clinically relevant.
`50947`	Repair of bladder, open; major	Sometimes reported for extensive bladder reconstruction/repair associated with partial cystectomy when additional complex repair is required.
`51596`	Excision of bladder diverticulum, partial cystectomy or other partial bladder excision (separate code for other partial cystectomy-related resections)	Related bladder excision procedures and may be used for partial bladder resections depending on coding conventions and documentation.
`43450`	Ureteroneocystostomy (reimplantation)	Performed when tumor resection necessitates ureteral reimplantation due to trigonal or distal ureteral involvement.

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-51525-BLADDER-DIVERTICULECTOMY-OPEN-EXCISION

CPT 51525: Open Excision of Bladder Diverticulum

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-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
`22`	Increased procedural services	Use when the operation required substantially greater effort or time due to prior radiation, dense adhesions, or extensive dissection beyond typical for `51555`.
`23`	Unusual anesthesia	Use if general anesthesia was contraindicated and an unusual anesthetic technique was required.
`26`	Professional component	Use when reporting the surgeon's professional component separate from technical facility charges if payer requires split billing.
`50`	Bilateral procedure	Not routinely applicable; include only if bilateral operative sites are documented and payer recognizes for this code.
`51`	Multiple procedures	Use when `51555` is performed with other distinct procedures during the same operative session.
`52`	Reduced services	Use when the procedure was attempted but substantially reduced or abbreviated.
`53`	Discontinued procedure	Use when the procedure was started but terminated due to extenuating circumstances prior to completion.
`62`	Two surgeons	Use when two surgeons of different specialties work together as primary surgeons performing distinct portions of the complex cystectomy.
`63`	Procedure performed on infants less than 4 kg	Rare for bladder procedures; include only if applicable by patient weight.
`78`	Unplanned return to OR	Use for an unplanned return to the operating room related to the original procedure during the postoperative period.
`80`	Assistant surgeon	Use when a surgical assistant is documented and payer requires separate reporting.
`81`	Minimum assistant surgeon	Use when a minimal assistant contribution is documented.
`82`	Assistant surgeon (when qualified resident not available)	Use when an assistant surgeon is required because a qualified resident is not available.
`TC`	Technical component	Use when reporting only the facility/technical component of the service if billed separately.
`AS`	Physician assistant, nurse practitioner, or clinical nurse specialist	Use to indicate these non-physician advanced practitioners performed diagnostic or therapeutic services under appropriate state law when applicable.

Taxonomy Code	Specialty	Notes
363A00000X	Urology	Primary specialty performing cystectomy procedures.
208800000X	General Surgery	Performs complex pelvic resections and may assist for extensive reconstruction.
207L00000X	Surgical Oncology	Provides oncologic surgical expertise for tumor resection planning and margins.
208000000X	Colon & Rectal Surgery	May assist when pelvic adhesions or rectal involvement require expertise.
207P00000X	Thoracic Surgery	Rarely involved; list included for institutional multidisciplinary teams when upper urinary tract involvement exists.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`C67.0`	Malignant neoplasm of trigone of bladder	Tumors in the trigone may require partial cystectomy with possible ureteral reimplantation.
`C67.1`	Malignant neoplasm of dome of bladder	Lesions at the dome can be amenable to partial cystectomy depending on extent.
`C67.2`	Malignant neoplasm of lateral wall of bladder	Common site for solitary muscle-invasive tumors treated with partial cystectomy in select patients.
`C67.7`	Malignant neoplasm of overlapping sites of bladder	Tumors spanning adjacent bladder sites that may complicate resection.
`D09.0`	Carcinoma in situ of bladder	CIS may influence surgical planning if focal high-grade disease is present.
`N32.0`	Bladder neck obstruction	May be present concomitantly and affect surgical approach and reconstruction.
`T66.XXXA`	Radiation sickness, unspecified, initial encounter	Prior pelvic radiation can cause tissue fibrosis and complicate cystectomy dissection; code selection must follow coding guidance for radiation effects if applicable.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`51045`	Cystostomy, suprapubic; initial placement	May be performed preoperatively or postoperatively for urinary drainage if prolonged bladder diversion is required.
`51701`	Insertion of temporary indwelling bladder catheter; simple (e.g., Foley)	Commonly performed intraoperatively or postoperatively for bladder drainage after partial cystectomy.
`50590`	Lithotripsy, shock wave (ESWL) percutaneous nephrolithotomy (PCNL) not elsewhere classified	Not typical but listed for completeness when simultaneous upper tract procedures are required; include only if clinically relevant.
`50947`	Repair of bladder, open; major	Sometimes reported for extensive bladder reconstruction/repair associated with partial cystectomy when additional complex repair is required.
`51596`	Excision of bladder diverticulum, partial cystectomy or other partial bladder excision (separate code for other partial cystectomy-related resections)	Related bladder excision procedures and may be used for partial bladder resections depending on coding conventions and documentation.
`43450`	Ureteroneocystostomy (reimplantation)	Performed when tumor resection necessitates ureteral reimplantation due to trigonal or distal ureteral involvement.

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-51525-BLADDER-DIVERTICULECTOMY-OPEN-EXCISION

CPT 51525: Open Excision of Bladder Diverticulum

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-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 51555: Complex Partial Cystectomy for Bladder Resection

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Billing Code Overview

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CPT 51555: Complex Partial Cystectomy for Bladder Resection

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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