Most kidney stone surgeries are outpatient procedures, meaning you go home the same day. The two most common approaches, shock wave lithotripsy and ureteroscopy, are both performed on an outpatient basis. The exception is percutaneous nephrolithotomy (PCNL), a more invasive surgery typically requiring a one- to two-day hospital stay.
Which Procedures Are Outpatient
Shock wave lithotripsy (SWL) uses focused sound waves to break kidney stones into smaller pieces that you can pass naturally. It’s performed under general anesthesia, and you’re typically monitored in recovery for an hour or two before heading home. Plan to be at the facility for roughly four hours total.
Ureteroscopy involves threading a thin scope through your urinary tract to reach the stone, then breaking it apart with a laser. This is also outpatient. After the procedure, staff will monitor you in a recovery room for one to two hours, manage any initial pain, and send you home the same day. About 96% of ureteroscopy patients go home as planned. In a study of nearly 1,800 ureteroscopies, only 3.9% resulted in an unplanned hospital admission, and most of those were just overnight observation stays rather than full admissions.
Percutaneous nephrolithotomy (PCNL) is the outlier. This procedure requires a small incision in your back to access and remove larger or more complex stones. Most people stay in the hospital for one to two days afterward. Some medical centers have explored same-day discharge for PCNL in carefully selected patients, but this is limited to people who are younger, have a BMI under 30 to 35, are otherwise healthy, and have an uncomplicated surgery with minimal bleeding.
What Determines Whether You Stay Overnight
Even with procedures designed to be outpatient, certain factors can turn a same-day surgery into an overnight stay. Before surgery, doctors look at your overall health profile. Active heart disease, having only one kidney, and impaired kidney function are common reasons a surgeon may plan for an inpatient stay from the start. A higher BMI or more complex medical history also raises the threshold.
What happens during surgery matters too. If the procedure is more difficult than expected, involves significant bleeding, or requires multiple access points, an overnight stay becomes more likely. After surgery, you’ll need to demonstrate that your pain is manageable with oral medications, your vital signs are stable, you don’t have a fever, and you can urinate. Uncontrolled pain, signs of infection, or hemodynamic instability are all reasons the surgical team will keep you longer.
Recovery at Home
For shock wave lithotripsy and ureteroscopy, most people return to normal activities within two to three days. PCNL recovery takes longer, usually one to two weeks before you’re back to your regular routine.
After ureteroscopy, your surgeon will often place a temporary ureteral stent, a small flexible tube that keeps the ureter open while you heal. Stents stay in for a few days to a few weeks depending on your situation. They’re effective but not comfortable. Up to 80% of people with stents experience side effects like bladder irritation, frequent urination, blood in their urine, or a sensation of pain in the kidney area when urinating. Some blood in your urine is normal and may come and go until the stent is removed. These symptoms are expected and generally manageable, though they can be the most bothersome part of recovery for many patients.
Cost Differences
Where your procedure is performed affects the price significantly. Shock wave lithotripsy averages about $437 at a freestanding surgical center compared to $776 at a hospital outpatient department. For more involved procedures like PCNL, the gap widens: roughly $1,045 at a surgical center versus $1,768 in a hospital setting.
Insurance classification also depends on the setting. For Medicare patients, outpatient procedures fall under Part B, which covers 80% of the cost after a $257 annual deductible in 2025, leaving you responsible for the remaining 20%. If your surgery requires a hospital stay, it shifts to Part A coverage, which has its own separate deductible structure. Private insurance plans generally follow a similar inpatient versus outpatient distinction, though your specific copays and deductibles will vary by plan. Knowing in advance whether your procedure is classified as outpatient can help you anticipate your out-of-pocket costs and avoid billing surprises.