Surgery & procedures
50590 — Lithotripsy, extracorporeal shock wave
This code covers extracorporeal shock wave lithotripsy (ESWL) — a non-invasive procedure that uses sound waves directed from outside the body to break up kidney stones into small fragments that can pass naturally thro...
- Typical setting: Hospital OR, urology clinic
- National avg charge (illustrative): $800-$1,800 Medicare allowed for physician professional fee (total facility charges: $5,000-$15,000; commercial payers vary widely)
- Most-disputed reason: Billing imaging guidance separately: fluoroscopic or ultrasound guidance used to locate the stone during ESWL is typically included in 50590 — separate imaging codes on the same day may constitute unbundling
What it means
What 50590 actually means
This code covers extracorporeal shock wave lithotripsy (ESWL) — a non-invasive procedure that uses sound waves directed from outside the body to break up kidney stones into small fragments that can pass naturally through urine. It is performed under sedation or anesthesia as an outpatient procedure and eliminates the need for surgical stone removal in many cases.
Common errors with this code
What goes wrong on real bills.
Most bills that look correct still contain at least one of these issues. Up to 49% of medical bills contain errors (CFPB).
- Billing imaging guidance separately: fluoroscopic or ultrasound guidance used to locate the stone during ESWL is typically included in 50590 — separate imaging codes on the same day may constitute unbundling
- Wrong code for surgical ureteroscopy: 50590 is only for non-invasive shock wave lithotripsy — surgical stone removal via ureteroscopy uses different codes (52353-52356)
- Multiple sessions billing: each separate ESWL session is billable as a separate encounter — ensure each session has its own distinct date of service in billing records
If you see 50590 on your bill
Three steps before paying.
1. Get the itemized bill. If your statement only shows a summary, request the CPT-level itemized bill before paying. Generate the request language →
2. Cross-check against the EOB. Compare what your insurer's Explanation of Benefits says you owe versus what the hospital is asking. They disagree more often than people think. Read the bill-vs-EOB guide →
3. Run a free Bill Scan. Upload the bill (and EOB if you have it) and BillBusted will flag the most likely issues with this specific code in your specific state. Run free scan →
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Related BillBusted guides
Plain-English reads if you see 50590 on a bill.
50590 FAQ
Plain-English answers.
What does 50590 usually cost?
$800-$1,800 Medicare allowed for physician professional fee (total facility charges: $5,000-$15,000; commercial payers vary widely). Costs vary by region, payer contract, and whether the service was performed in a hospital outpatient department (which adds a facility fee) versus a free-standing clinic.
What's the most common billing error on 50590?
Billing imaging guidance separately: fluoroscopic or ultrasound guidance used to locate the stone during ESWL is typically included in 50590 — separate imaging codes on the same day may constitute unbundling
What should I do if I see 50590 on my bill?
Request the itemized bill and the matching EOB from your insurer. Compare the units/quantity billed against what you actually received. Run a free BillBusted scan to flag the most likely errors specific to 50590 before paying.
Don't pay 50590 blindly.
The free scan tells you in under 60 seconds whether this charge looks reasonable for your situation.