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MP 7.01.08 Extracorporeal Shock Wave Lithotripsy for Kidney Stones

Medical Policy
Section
Surgery
Original Policy Date
12/1/95
Last Review Status/Date
Reviewed by consensus/3:2003
Issue
3:2003
Return to Medical Policy Index

Disclaimer

Our medical policies are designed for informational purposes only and are not an authorization, or an explanation of benefits, or a contract.  Receipt of benefits is subject to satisfaction of all terms and conditions of the coverage.  Medical technology is constantly changing, and we reserve the right to review and update our policies periodically.


Description

Extracorporeal shock wave lithotripsy (ESWL) is a non-invasive treatment option for the management of kidney or ureteral stones. Other options include expectant management (particularly for small stones), percutaneous antegrade nephrostoureterolithotomy, retrograde ureteroscopy with or without intracorporeal lithotripsy, laparoscopic ureterolithotomy, and open ureterolithotomy. The choice of treatment is primarily based on size, location, and composition of the stone. ESWL consists of high-intensity shock waves that are produced electrically, and focused radiographically or ultrasonically on the treatment area. More than one treatment may be required. General, spinal, or epidural anesthesia is usually administered with this procedure.

Following ESWL, most kidney stone fragments are eventually eliminated in the urine. Adjunctive procedures (e.g., pre-ESWL stent placement or stone manipulation, and post-ESWL endoscopy or surgery) are estimated to be required in 7%–15% of patients to ensure the complete removal of the stone fragments.


Policy

The use of extracorporeal shock wave lithotripsy is medically necessary for the treatment of kidney stones.

Indications for extracorporeal shock wave lithotripsy for kidney stones are listed under Policy Guidelines.


Policy Guidelines

Indications for ESWL include:

  • stone no smaller than 3 mm in diameter (these stones generally pass spontaneously);
  • no more than 3 stones present;
  • stone is symptomatic and not likely to pass spontaneously;
  • uncontrolled infections are managed;
  • renal tract obstructions (not related to the stone) are corrected;
  • stone can be visualized after imaging study;
  • patient anatomy allows for proper focusing of the shock wave;
  • treated kidney is functional;
  • absence of any signs of renal artery calcification or aneurysm.

Stones up to 2 cm are generally treated in a single procedure; larger stones may require multiple procedures. Larger stones will often require adjunctive procedures. ESWL should be used with extreme caution in pregnant women and children.


Benefit Application

BlueCard/National Account Issues

This procedure adjudicates under the Surgery benefit. Pre-ESWL stent placement and/or stone manipulation are considered an integral part of the primary procedure (ESWL) and are generally not reimbursed separately.


Rationale

A search of literature was completed through the MEDLINE database for the period of January 1992 through April 1995. The search strategy focused on references containing the following Medical Subject Headings:

– Kidney Calculi
 
– Lithotripsy

Research was limited to English-language journals on humans.

See also:

TEC Evaluation and Coverage 1988: p. 502
 
TEC Strategies: Extracorporeal Shock Wave Lithotripsy: Clinical Assessment, Utilization and Cost Projection; May 1985

 

Codes

Number

Description

CPT 

50590 

Extracorporeal shock wave lithotripsy 

ICD-9 Procedure 

98.51 

ESWL of the kidney, ureter, and/or bladder 

ICD-9 Diagnosis 

592.0 

Calculus of kidney 

HCPCS 

No Code 

Type of Service 

Surgery 

Place of Service 

Inpatient
 
Outpatient
 


Index

Extracorporeal shock wave lithotripsy for kidney stones
Kidney stones, extracorporeal shock wave lithotripsy for
Lithotripsy, extracorporeal shock wave, for kidney stones


Policy History

Date Action Reason
12/01/95 Add to Surgery section New policy
7/31/97 Replace policy Reviewed with changes: Revised Description
7/12/02 Replace policy Policy reviewed without literature review; new review date only.
10/9/03 Replace policy Policy reviewed by consensus without literature review; no change in policy; no further review scheduled.


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