Summary & Overview
CPT 50845: Appendicovesicostomy Using Appendix for Urinary Diversion
CPT code 50845 represents an appendicovesicostomy procedure: creation of a urinary conduit using the appendix with reanastomosis of the bowel to restore intestinal continuity. This reconstructive urologic surgery is performed primarily for patients with neurogenic or congenital bladder dysfunction who require a continent or incontinent urinary diversion. Nationally, the code is relevant for hospital surgical billing, specialty urology coverage decisions, and post-operative care coordination.
Key payers commonly involved in coverage and reimbursement for CPT code 50845 include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise clinical context for the procedure, typical sites of service, and the operational considerations that influence coding and billing for major reconstructive urinary surgery. The publication provides benchmarks on payer coverage policies, notes common modifier usage patterns, and summarizes typical claims processing topics and potential authorization requirements.
This executive summary is intended to orient clinicians, coding professionals, and policy analysts to the clinical intent and billing context of CPT code 50845, highlighting where stakeholders should focus review of coverage rules, payment policies, and documentation practices.
Billing Code Overview
CPT code 50845 describes a surgical urinary diversion using the appendix (appendicovesicostomy with bowel continuity restoration). In this procedure the surgeon detaches the appendix, anastomoses one end to the urinary bladder to create an internal conduit for urine, and brings the other end to the abdominal wall as a stoma for external urinary drainage; the bowel ends are then reconnected to reestablish intestinal continuity.
-
Service type: Surgical urinary diversion (reconstructive urologic surgery)
-
Typical site of service: Inpatient hospital operating room or specialized ambulatory surgery center for major reconstructive urologic procedures
Clinical & Coding Specifications
Clinical Context
A typical patient is a 25–45-year-old with neurogenic bladder from spinal cord injury or a congenital bladder dysfunction (for example, severe bladder exstrophy or spina bifida) leading to chronic urinary retention, high-pressure bladder, recurrent infections, or inability to catheterize cleanly. The patient has failed conservative management (behavioral measures, intermittent catheterization, anticholinergic therapy) and requires a urinary diversion to protect renal function and provide reliable continence management.
Preoperative workflow includes urology evaluation, renal imaging (renal ultrasound, CT urogram as indicated), urodynamic testing, and counseling about stoma care. On the day of surgery in an operating room or ambulatory surgery center, the surgeon performs an appendicovesicostomy: the appendix is harvested, the proximal end is anastomosed to the bladder to create a continent catheterizable channel, and the distal end is brought to the abdominal wall as a stoma. The appendiceal donor site is closed and bowel continuity is restored by suturing the intestinal ends. Postoperative management includes catheter drainage of the new channel, pain control, stoma care education, and monitoring for urinary leak, bowel complications, or infection. Typical inpatient stay ranges from 1–5 days depending on patient comorbidities and complications. Common payors include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, BUCA, and Medicare depending on patient coverage.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
00 |