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Official Description

Ureterolithotomy; middle one-third of ureter

© Copyright 2025 American Medical Association. All rights reserved.

Common Language Description

An ureterolithotomy is a surgical procedure specifically designed to remove a calculus, commonly referred to as a stone, from the ureter, which is the duct that carries urine from the kidney to the bladder. This procedure is indicated when a stone obstructs the ureter, causing pain, infection, or other complications. The surgery involves making an incision in the abdomen, which may be located over the upper, middle, or lower ureter, depending on the precise location of the stone. During the operation, the abdominal wall muscles are carefully divided, and the peritoneum, the lining of the abdominal cavity, is pushed aside to access the ureter. Once the ureter is identified, it is meticulously dissected free from surrounding tissues, including the serosa and periureteral fat. The surgeon then locates the stone, which may be visually identified by a bulge in the ureter or through manual palpation. To facilitate the removal of the stone, vascular loops are placed above and below it to immobilize the ureter. An incision is made directly over the stone, allowing for its extraction. After the stone is removed, a catheter is inserted into the ureter for irrigation, ensuring that any remaining fragments are cleared. A drainage tube, such as a soft Penrose or suction tube, is then placed to facilitate drainage from the ureter. The ureter incision is carefully closed to avoid constriction, and the abdominal incision is closed around the drainage tube. This procedure is categorized under CPT® Code 50620, which specifically refers to the removal of stones from the middle one-third of the ureter, distinguishing it from similar procedures for the upper and lower segments of the ureter.

© Copyright 2025 Coding Ahead. All rights reserved.

1. Indications

The ureterolithotomy procedure is indicated for the following conditions:

  • Ureteral Calculi The presence of stones in the ureter that cause obstruction, pain, or infection.
  • Ureteral Obstruction Blockage of urine flow due to a stone, leading to potential kidney damage or infection.
  • Severe Pain Intense discomfort associated with ureteral stones that may not respond to conservative management.

2. Procedure

The ureterolithotomy procedure involves several critical steps to ensure the successful removal of the stone from the ureter:

  • Step 1: Incision An incision is made in the abdomen over the area corresponding to the middle one-third of the ureter, which is determined based on the location of the stone. This incision allows access to the ureter for the subsequent steps of the procedure.
  • Step 2: Muscle Division The muscles of the abdominal wall are carefully divided to provide a clear pathway to the ureter. This step is crucial for minimizing trauma to surrounding tissues and ensuring proper access.
  • Step 3: Peritoneal Access The peritoneum is gently pushed aside to expose the ureter. This maneuver is essential for visualizing the ureter and surrounding structures during the procedure.
  • Step 4: Ureter Identification The ureter is identified and dissected free from the serosa and periureteral fat. This dissection is performed with precision to avoid damaging the ureter or surrounding tissues.
  • Step 5: Stone Localization The site of the stone is identified either visually, by observing a bulge in the ureter, or manually, by palpating the ureter. This step is critical for ensuring that the stone can be effectively removed.
  • Step 6: Stone Immobilization Vascular loops are placed above and below the stone to immobilize it, providing stability during the incision and removal process.
  • Step 7: Ureter Incision An incision is made directly over the stone, allowing for its removal. This step requires careful technique to minimize damage to the ureter.
  • Step 8: Stone Removal The stone is extracted from the ureter. If any fragments remain, they are removed during the irrigation process.
  • Step 9: Ureter Irrigation A catheter is placed in the ureter, and the ureter is irrigated to ensure that all stone fragments are cleared from the urinary tract.
  • Step 10: Drainage Placement A soft Penrose drainage tube or suction tube is placed to facilitate drainage from the ureter, preventing fluid accumulation and potential complications.
  • Step 11: Ureter Closure The incision in the ureter is carefully closed, ensuring that it does not constrict the ureter, which is vital for maintaining normal urine flow.
  • Step 12: Abdominal Closure Finally, the abdominal incision is closed around the drainage tube, completing the procedure.

3. Post-Procedure

After the ureterolithotomy, patients are typically monitored for any signs of complications, such as infection or bleeding. The placement of a drainage tube allows for the continuous removal of urine and any residual fluid from the surgical site, which aids in recovery. Patients may experience some discomfort and are often prescribed pain management as needed. Follow-up appointments are essential to assess the healing process and ensure that the ureter is functioning properly. Additional imaging studies may be performed to confirm the complete removal of the stone and to monitor for any new stone formation.

Short Descr REMOVAL OF URETER STONE
Medium Descr URTROLITHOTOMY MIDDLE ONE-THIRD URETER
Long Descr Ureterolithotomy; middle one-third of ureter
Status Code Active Code
Global Days 090 - Major Surgery
PC/TC Indicator (26, TC) 0 - Physician Service Code
Multiple Procedures (51) 2 - Standard payment adjustment rules for multiple procedures apply.
Bilateral Surgery (50) 1 - 150% payment adjustment for bilateral procedures applies.
Physician Supervisions 09 - Concept does not apply.
Assistant Surgeon (80, 82) 2 - Payment restriction for assistants at surgery does not apply to this procedure...
Co-Surgeons (62) 1 - Co-surgeons could be paid, though supporting documentation is required...
Team Surgery (66) 0 - Team surgeons not permitted for this procedure.
Diagnostic Imaging Family 99 - Concept Does Not Apply
APC Status Indicator Inpatient Procedures, not paid under OPPS
Type of Service (TOS) 2 - Surgery
Berenson-Eggers TOS (BETOS) P1G - Major procedure - Other
MUE 1
CCS Clinical Classification 112 - Other OR therapeutic procedures of urinary tract
51 Multiple procedures: when multiple procedures, other than e/m services, physical medicine and rehabilitation services or provision of supplies (eg, vaccines), are performed at the same session by the same individual, the primary procedure or service may be reported as listed. the additional procedure(s) or service(s) may be identified by appending modifier 51 to the additional procedure or service code(s). note: this modifier should not be appended to designated "add-on" codes (see appendix d).
AS Physician assistant, nurse practitioner, or clinical nurse specialist services for assistant at surgery
LT Left side (used to identify procedures performed on the left side of the body)
RT Right side (used to identify procedures performed on the right side of the body)
XS Separate structure, a service that is distinct because it was performed on a separate organ/structure
Date
Action
Notes
2011-01-01 Changed Medium description changed.
Pre-1990 Added Code added.
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