Summary & Overview
CPT 51050: Open Bladder Stone Extraction
CPT code 51050 denotes an open surgical incision into the urinary bladder to remove a bladder calculus without resection of the bladder neck. This code captures a definitive, operative approach to bladder stone removal when less invasive methods (transurethral extraction or lithotripsy) are not appropriate or feasible. Nationally, accurate use of 51050 matters for appropriate facility and professional reimbursement, procedure tracking, and quality reporting for urologic surgical care. Key payers discussed include Aetna, Blue Cross Blue Shield (BCBS), Cigna, UnitedHealthcare, and Medicare. Readers will find a concise clinical context for the procedure, common payer coverage considerations, and a summary of typical sites of service. The publication outlines benchmarks and reimbursement themes where available, highlights documentation elements tied to the CPT description, and summarizes policy considerations that affect coding and claims processing. Data not available in the input will be noted where applicable; the content focuses on the code definition, clinical setting, and the principal payer landscape at a national level.
Billing Code Overview
CPT code 51050 describes a surgical procedure in which the provider makes an incision in the urinary bladder to remove a calculus (bladder stone) without performing resection of the bladder neck. This is an open surgical bladder stone extraction rather than an endoscopic or lithotripsy approach.
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Service type: Surgical procedure — open bladder stone removal (cystotomy with stone extraction)
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Typical site of service: Inpatient or outpatient surgical setting such as an operating room in a hospital or an ambulatory surgery center, depending on clinical indications and patient status.
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Clinical & Coding Specifications
Clinical Context
A 62-year-old male presents with lower abdominal pain, urinary frequency, and intermittent gross hematuria. Imaging (KUB radiograph and non-contrast CT) demonstrates a 2.5 cm radiopaque calculus within the urinary bladder causing recurrent urinary tract infections and obstructive voiding symptoms. Conservative removal attempts with transurethral extraction under cystoscopic guidance were unsuccessful due to the stone's size and embedded position. The urologist schedules an open cystolithotomy for direct access to the bladder and stone removal. The clinical workflow includes preoperative evaluation (history, physical, urinalysis, urine culture with targeted antibiotics if infected), informed consent discussing risks (bleeding, infection, injury to adjacent structures), preoperative anesthesia evaluation and site verification, operative incision and cystotomy, stone extraction without bladder neck resection, bladder closure with layers and drain as indicated, postoperative monitoring for hematuria and urinary retention, pain control, and follow-up for wound and bladder healing. Typical perioperative documentation includes indication, imaging reports, operative note describing incision into the bladder and stone removal, estimated blood loss, specimen disposition, and postoperative instructions for urinary catheter management and activity restrictions.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
00 | No modifier reported / not commonly used clinically | Rarely appended; included in raw list but not typically applied to outpatient procedural billing |
11 | Office or other outpatient visit by the same physician | Append when the same provider performs the global service and documents a significant, separately identifiable evaluation and management service on the same day in accordance with payer rules |
22 | Increased procedural services | Use when the cystolithotomy required substantially greater effort, time, or complexity than typical and documentation supports increased work |
23 | Unusual anesthesia | Use when general anesthesia is medically necessary for an otherwise normally local/monitored procedure and anesthesia is unusual for the setting |
26 | Professional component | Use when billing only the physician’s professional component separate from the technical component for diagnostic services (rare for open cystolithotomy) |
50 | Bilateral procedure | Not generally applicable to bladder stone removal; included if an unusual bilateral anatomic approach or bilateral procedures coded separately are performed |
51 | Multiple procedures | Use when additional unrelated procedures are performed at the same operative session and payer requires modifier to indicate multiple procedures |
52 | Reduced services | Use when the procedure is partially reduced or not completed as originally planned and documentation supports the reduction |
53 | Discontinued procedure | Use when the cystolithotomy is started but discontinued due to extenuating circumstances (e.g., unstable patient) with appropriate documentation |
59 | Distinct procedural service | Use when another procedure performed during the same session is distinct and separate from the cystolithotomy (e.g., concurrent unrelated genitourinary procedure) |
62 | Two surgeons | Use when two surgeons of different specialties perform distinct portions of the procedure and documentation supports shared performance |
63 | Procedure performed on infants less than 4 kg | Use if patient is an infant under weight threshold and documentation supports modifier requirement |
76 | Repeat procedure by same physician | Use when the same physician repeats the procedure within the global period for a separate documented reason (not in raw list; not included) |
78 | Unplanned return to operating room by same physician following initial procedure for a related procedure during the global period | Use when the patient returns to the OR for a related complication (e.g., postoperative bleeding requiring re-exploration) |
80 | Assistant surgeon | Use when an assistant surgeon (not a co-surgeon) assists and payer requires modifier to identify assistant involvement |
| Taxonomy Code | Specialty | Notes |
|---|---|---|
| 208800000X | Urology | Primary specialty performing cystolithotomy procedures |
| 207L00000X | General Surgery | May perform open bladder procedures in some settings or trauma cases |
| 2086S0106X | Pediatric Urology | Performs bladder stone removal in pediatric patients when applicable |
| 2080P0206X | Surgery - Urologic | Alternate taxonomy for urologic surgeons in some payer files |
| 207XS0102X | Trauma Surgery | In acute trauma with bladder injury and concomitant stone management, trauma surgeons may be involved |
Related Diagnoses
| ICD-10 Code | Description | Clinical Relevance |
|---|---|---|
N21.0 | Calculus of bladder with hematuria | Direct indication for bladder stone removal when associated with bleeding |
N21.1 | Calculus of bladder without hematuria | Primary diagnosis for symptomatic bladder stones causing voiding symptoms or infection |
N39.0 | Urinary tract infection, site not specified | Recurrent or persistent infections may be an indication for definitive stone removal |
N32.0 | Bladder-neck obstruction | Anatomic obstruction contributing to stone formation or retention; may influence surgical approach but bladder neck not resected in this procedure |
N28.1 | Chronic kidney disease, stage unspecified (placeholder for renal insufficiency) | Renal dysfunction influences perioperative management and fluid/antibiotic decisions; include appropriate specific CKD code in documentation |
Related CPT Codes
| CPT Code | Description | Relationship to This Procedure |
|---|---|---|
51040 | Cystolithotomy, including drainage of diverticulum (separate procedure) | Alternative or related open bladder stone procedure; may be coded when diverticulum drainage is performed with stone removal |
52310 | Cystourethroscopy, diagnostic, with or without collection of specimen(s) by brushing or washing | Often performed preoperatively or intraoperatively for diagnostic visualization prior to deciding open cystolithotomy |
52320 | Cystourethroscopy, diagnostic, with removal of foreign body or calculus by forceps | Performed when transurethral cystoscopic stone extraction is attempted and may precede conversion to open cystolithotomy if unsuccessful |
50590 | Extracorporeal shock wave lithotripsy (ESWL), renal and ureteral stones | Alternative, less invasive treatment for urinary calculi when anatomy and stone characteristics permit; may be considered before open surgery |
51990 | Insertion of temporary bladder catheter (eg, Foley) | Performed preoperatively or postoperatively for bladder drainage and bladder irrigation after cystolithotomy |
11010 | Debridement of skin/soft tissue for wound management (minor) | May be used if the operative incision requires additional soft tissue management or debridement at the same session |