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Official Description

Lithotripsy, extracorporeal shock wave

© Copyright 2025 American Medical Association. All rights reserved.

Common Language Description

Extracorporeal shock wave lithotripsy (ESWL) is a non-invasive medical procedure primarily used for the treatment of renal and ureteral stones, commonly referred to as calculi. This technique utilizes high-energy shock waves to break down stones into smaller fragments, facilitating their passage through the urinary tract. The procedure is favored due to its effectiveness and minimal recovery time compared to more invasive surgical options. The lithotripsy machine is composed of four essential components: a shock-wave generator that produces the energy needed to fragment the stones, a focusing system that directs the shock waves precisely at the stone, a coupling mechanism that ensures effective transmission of the shock waves through the skin, and an imaging unit that aids in locating the stone and monitoring its fragmentation during the procedure. The use of fluoroscopic or ultrasound imaging is critical for accurately positioning the stone within the focus of the shock waves, ensuring optimal treatment outcomes. Overall, ESWL represents a significant advancement in the management of urinary stones, providing patients with a less painful and more efficient alternative to traditional surgical methods.

© Copyright 2025 Coding Ahead. All rights reserved.

1. Indications

Extracorporeal shock wave lithotripsy (ESWL) is indicated for the treatment of specific conditions related to urinary stones. The following are the primary indications for this procedure:

  • Renal Stones The presence of calculi within the kidney that may cause pain, obstruction, or infection.
  • Ureteral Stones Stones located in the ureter that can lead to urinary obstruction and associated symptoms.

2. Procedure

The procedure for extracorporeal shock wave lithotripsy involves several critical steps to ensure effective treatment of the stones. The following outlines the procedural steps:

  • Patient Positioning Depending on the location of the stone, the patient is positioned either on their back or abdomen on the treatment table to optimize the targeting of the stone by the shock waves.
  • Imaging Localization Fluoroscopic or ultrasound imaging is utilized to accurately locate the stone within the urinary tract. This step is essential for ensuring that the shock waves are directed precisely at the stone.
  • Application of Coupling Gel A coupling gel is applied to the skin at the site where the shock tube will be placed. This gel facilitates the transmission of shock waves from the lithotripsy machine to the stone by eliminating air gaps.
  • Shock Tube Placement The shock tube is pressed against the skin, ensuring a secure and effective contact point for the delivery of shock waves.
  • Delivery of Shock Waves Shock waves are delivered through the tube at rates of up to 120 per minute. The fragmentation of the stone is monitored radiographically throughout the treatment to assess the effectiveness of the procedure.
  • Termination of Treatment Once the stone fragments are sufficiently small to allow passage through the kidney and ureter, the ESWL treatment is concluded.

3. Post-Procedure

After the completion of extracorporeal shock wave lithotripsy, patients may experience some discomfort or mild pain as the stone fragments pass through the urinary tract. It is important for patients to stay hydrated to facilitate the passage of these fragments. Follow-up imaging may be required to ensure that all stone fragments have been successfully eliminated. Patients should be monitored for any signs of complications, such as infection or obstruction, and appropriate post-procedure care instructions should be provided to ensure a smooth recovery.

Short Descr FRAGMENTING OF KIDNEY STONE
Medium Descr LITHOTRIPSY XTRCORP SHOCK WAVE
Long Descr Lithotripsy, extracorporeal shock wave
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) 1 - Statutory payment restriction for assistants at surgery applies to this procedure...
Co-Surgeons (62) 0 - Co-surgeons not permitted for this procedure.
Team Surgery (66) 0 - Team surgeons not permitted for this procedure.
Diagnostic Imaging Family 99 - Concept Does Not Apply
APC Status Indicator Hospital Part B services paid through a comprehensive APC
ASC Payment Indicator Non office-based surgical procedure added in CY 2008 or later; payment based on OPPS relative payment weight.
Type of Service (TOS) 2 - Surgery
Berenson-Eggers TOS (BETOS) P5D - Ambulatory procedures - lithotripsy
MUE 1
CCS Clinical Classification 107 - Extracorporeal lithotripsy, urinary
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)
58 Staged or related procedure or service by the same physician or other qualified health care professional during the postoperative period: it may be necessary to indicate that the performance of a procedure or service during the postoperative period was: (a) planned or anticipated (staged); (b) more extensive than the original procedure; or (c) for therapy following a surgical procedure. this circumstance may be reported by adding modifier 58 to the staged or related procedure. note: for treatment of a problem that requires a return to the operating/procedure room (eg, unanticipated clinical condition), see modifier 78.
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).
50 Bilateral procedure: unless otherwise identified in the listings, bilateral procedures that are performed at the same session, should be identified by adding modifier 50 to the appropriate 5 digit code. note: this modifier should not be appended to designated "add-on" codes (see appendix d).
79 Unrelated procedure or service by the same physician or other qualified health care professional during the postoperative period: the individual may need to indicate that the performance of a procedure or service during the postoperative period was unrelated to the original procedure. this circumstance may be reported by using modifier 79. (for repeat procedures on the same day, see modifier 76.)
SG Ambulatory surgical center (asc) facility service
78 Unplanned return to the operating/procedure room by the same physician or other qualified health care professional following initial procedure for a related procedure during the postoperative period: it may be necessary to indicate that another procedure was performed during the postoperative period of the initial procedure (unplanned procedure following initial procedure). when this procedure is related to the first, and requires the use of an operating/procedure room, it may be reported by adding modifier 78 to the related procedure. (for repeat procedures, see modifier 76.)
GC This service has been performed in part by a resident under the direction of a teaching physician
AQ Physician providing a service in an unlisted health professional shortage area (hpsa)
59 Distinct procedural service: under certain circumstances, it may be necessary to indicate that a procedure or service was distinct or independent from other non-e/m services performed on the same day. modifier 59 is used to identify procedures/services, other than e/m services, that are not normally reported together, but are appropriate under the circumstances. documentation must support a different session, different procedure or surgery, different site or organ system, separate incision/excision, separate lesion, or separate injury (or area of injury in extensive injuries) not ordinarily encountered or performed on the same day by the same individual. however, when another already established modifier is appropriate it should be used rather than modifier 59. only if no more descriptive modifier is available, and the use of modifier 59 best explains the circumstances, should modifier 59 be used. note: modifier 59 should not be appended to an e/m service. to report a separate and distinct e/m service with a non-e/m service performed on the same date, see modifier 25.
AG Primary physician
22 Increased procedural services: when the work required to provide a service is substantially greater than typically required, it may be identified by adding modifier 22 to the usual procedure code. documentation must support the substantial additional work and the reason for the additional work (ie, increased intensity, time, technical difficulty of procedure, severity of patient's condition, physical and mental effort required). note: this modifier should not be appended to an e/m service.
52 Reduced services: under certain circumstances a service or procedure is partially reduced or eliminated at the discretion of the physician or other qualified health care professional. under these circumstances the service provided can be identified by its usual procedure number and the addition of modifier 52, signifying that the service is reduced. this provides a means of reporting reduced services without disturbing the identification of the basic service. note: for hospital outpatient reporting of a previously scheduled procedure/service that is partially reduced or cancelled as a result of extenuating circumstances or those that threaten the well-being of the patient prior to or after administration of anesthesia, see modifiers 73 and 74 (see modifiers approved for asc hospital outpatient use).
53 Discontinued procedure: under certain circumstances, the physician or other qualified health care professional may elect to terminate a surgical or diagnostic procedure. due to extenuating circumstances or those that threaten the well being of the patient, it may be necessary to indicate that a surgical or diagnostic procedure was started but discontinued. this circumstance may be reported by adding modifier 53 to the code reported by the individual for the discontinued procedure. note: this modifier is not used to report the elective cancellation of a procedure prior to the patient's anesthesia induction and/or surgical preparation in the operating suite. for outpatient hospital/ambulatory surgery center (asc) reporting of a previously scheduled procedure/service that is partially reduced or cancelled as a result of extenuating circumstances or those that threaten the well being of the patient prior to or after administration of anesthesia, see modifiers 73 and 74 (see modifiers approved for asc hospital outpatient use).
54 Surgical care only: when 1 physician or other qualified health care professional performs a surgical procedure and another provides preoperative and/or postoperative management, surgical services may be identified by adding modifier 54 to the usual procedure number.
73 Discontinued out-patient hospital/ambulatory surgery center (asc) procedure prior to the administration of anesthesia: due to extenuating circumstances or those that threaten the well being of the patient, the physician may cancel a surgical or diagnostic procedure subsequent to the patient's surgical preparation (including sedation when provided, and being taken to the room where the procedure is to be performed), but prior to the administration of anesthesia (local, regional block(s) or general). under these circumstances, the intended service that is prepared for but cancelled can be reported by its usual procedure number and the addition of modifier 73. note: the elective cancellation of a service prior to the administration of anesthesia and/or surgical preparation of the patient should not be reported. for physician reporting of a discontinued procedure, see modifier 53.
74 Discontinued out-patient hospital/ambulatory surgery center (asc) procedure after administration of anesthesia: due to extenuating circumstances or those that threaten the well being of the patient, the physician may terminate a surgical or diagnostic procedure after the administration of anesthesia (local, regional block(s), general) or after the procedure was started (incision made, intubation started, scope inserted, etc). under these circumstances, the procedure started but terminated can be reported by its usual procedure number and the addition of modifier 74. note: the elective cancellation of a service prior to the administration of anesthesia and/or surgical preparation of the patient should not be reported. for physician reporting of a discontinued procedure, see modifier 53.
76 Repeat procedure or service by same physician or other qualified health care professional: it may be necessary to indicate that a procedure or service was repeated by the same physician or other qualified health care professional subsequent to the original procedure or service. this circumstance may be reported by adding modifier 76 to the repeated procedure or service. note: this modifier should not be appended to an e/m service.
77 Repeat procedure by another physician or other qualified health care professional: it may be necessary to indicate that a basic procedure or service was repeated by another physician or other qualified health care professional subsequent to the original procedure or service. this circumstance may be reported by adding modifier 77 to the repeated procedure or service. note: this modifier should not be appended to an e/m service.
99 Multiple modifiers: under certain circumstances 2 or more modifiers may be necessary to completely delineate a service. in such situations modifier 99 should be added to the basic procedure, and other applicable modifiers may be listed as part of the description of the service.
AS Physician assistant, nurse practitioner, or clinical nurse specialist services for assistant at surgery
CR Catastrophe/disaster related
GA Waiver of liability statement issued as required by payer policy, individual case
GV Attending physician not employed or paid under arrangement by the patient's hospice provider
GW Service not related to the hospice patient's terminal condition
KT Beneficiary resides in a competitive bidding area and travels outside that competitive bidding area and receives a competitive bid item
LC Left circumflex coronary artery
Q6 Service furnished under a fee-for-time compensation arrangement by a substitute physician or by a substitute physical therapist furnishing outpatient physical therapy services in a health professional shortage area, a medically underserved area, or a rural area
QJ Services/items provided to a prisoner or patient in state or local custody, however the state or local government, as applicable, meets the requirements in 42 cfr 411.4 (b)
SU Procedure performed in physician's office (to denote use of facility and equipment)
XE Separate encounter, a service that is distinct because it occurred during a separate encounter
XS Separate structure, a service that is distinct because it was performed on a separate organ/structure
XU Unusual non-overlapping service, the use of a service that is distinct because it does not overlap usual components of the main service
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