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Extracorporeal shock wave therapy (ESWT) is a noninvasive method that may be used to treat pain using shock or sound waves directed from outside the body onto the area to be treated, eg, the heel in the case of plantar fasciitis. Shock waves may be generated at high- or low-energy intensity, and treatment protocols may include more than one treatment. ESWT has been investigated for use in a variety of musculoskeletal conditions.
ESWT, also known as orthotripsy, has been available since the early 1980s for the treatment of renal stones and has been widely investigated for the treatment of biliary stones. ESWT uses externally-applied shock waves to create a transient pressure disturbance, which disrupts solid structures, breaking them into smaller fragments, thus allowing spontaneous passage and/or removal of stones. The mechanism by which ESWT might have an effect on musculoskeletal conditions is not well-defined. Chronic musculoskeletal conditions (eg, tendinitis) can be associated with a substantial degree of scarring and calcium deposition. Calcium deposits may restrict motion and encroach on other structures, such as nerves and blood vessels, causing pain and decreased function. One hypothesis is that disruption of these calcific deposits by shock waves may loosen adjacent structures and promote resorption of calcium, thereby decreasing pain and improving function.
Other mechanisms are also thought to be involved in the mechanism of ESWT. Physical stimuli are known to activate endogenous pain control systems, and activation by shock waves may “reset” the endogenous pain receptors. Damage to endothelial tissue from ESWT may result in increased vessel wall permeability, causing increased diffusion of cytokines, which may in turn promote healing. Microtrauma induced by ESWT may promote angiogenesis and thus aid healing. Finally, shock waves have been shown to stimulate osteogenesis and promote callous formation in animals, which is the basis for trials of ESWT in delayed union or non-union of bone fractures.
Plantar fasciitis is a very common ailment characterized by deep pain in the plantar aspect of the heel, particularly on arising from bed. While the pain may subside with activity, in some patients the pain persists, interrupting activities of daily living. On physical examination, firm pressure will elicit a tender spot over the medial tubercle of the calcaneus. The exact etiology of plantar fasciitis is unclear, although repetitive injury is suspected. Heel spurs are a common associated finding, although it has never been proven that heel spurs cause the pain and asymptomatic heel spurs can be found in up to 10% of the population. Most cases of plantar fasciitis are treated with conservative therapy, including rest or minimization of running and jumping, heel cups, and nonsteroidal-anti-inflammatory drugs. Local steroid injection may also be used. Improvement may take up to one year in some cases.
Tendinitis and Tendinopathies
ESWT has been investigated for a variety of tendinitis/tendinopathy syndromes. Some of the more common tendinitis syndromes are summarized in the table below. Many tendinitis and tendinopathy syndromes are related to overuse injury. Conservative treatment often involves rest, activity modifications, physical therapy, and anti-inflammatory medications.
Tendinitis and Tendinopathy Syndromes
NSAIDs: nonsteroidal anti-inflammatory drugs
Fracture Nonunion and Delayed Union
The definition of a fracture nonunion has remained controversial, particularly the duration necessary to define a condition of nonunion. One proposed definition is failure of progression of fracture-healing for at least 3 consecutive months (and at least 6 months following the fracture) accompanied by clinical symptoms of delayed/nonunion (pain, difficulty weight bearing). For purposes of policy development, the following criteria have been used to define nonunion:
Delayed union can be defined as a decelerating healing process, as determined by serial radiographs, together with a lack of clinical and radiologic evidence of union, bony continuity, or bone reaction at the fracture site for no less than 3 months from the index injury or the most recent intervention. (In contrast, nonunion serial radiographs show no evidence of healing.)
Other Musculoskeletal and Neurologic Conditions
ESWT has been investigated for various other musculoskeletal conditions, including medial tibial stress syndrome, osteonecrosis (avascular necrosis) of the femoral head, coccydynia, and painful stump neuromas.
Spasticity refers to a motor disorder characterized by increased velocity-dependent stretch reflexes. It is one characteristic of upper motor neuron dysfunction, which may be due to a variety of pathologies.
Currently, six (6) ESWT devices have been approved by the U.S. Food and Drug Administration (FDA) through the premarket approval process for orthopedic use.
Both high-dose and low-dose protocols have been investigated. A high-dose protocol consists of a single treatment of high-energy shock waves (1300mJ/mm²). This painful procedure requires anesthesia. A low-dose protocol consists of multiple treatments, spaced one (1) week to one (1) month apart, in which a lower dose of shock waves is applied. This protocol does not require anesthesia. The FDA-labeled indication for the OssaTron® and Epos™ Ultra device specifically describes a high-dose protocol, while the labeled indication for the Sonocur® device describes a low-dose protocol.
In May 2007, Dolorclast® (EMS Electro Medical Systems; Nyon, Switzerland), another type of ESWT, called radial ESWT was approved by the FDA through the premarket approval (PMA). Radial ESWT is generated ballistically by accelerating a bullet to hit an applicator, which transforms the kinetic energy into radially expanding shock waves. Other types of ESWT produce focused shock waves that show deeper tissue penetration with significantly higher energies concentrated to a small focus. Radial ESWT is described as an alternative to focused ESWT and is said to address larger treatment areas, thus providing potential advantages in superficial applications like tendinopathies.
ESWT is a noninvasive procedure for breaking up kidney stones. High intensity shock waves are produced electrically on the treatment area. ESWT treatment consists of approximately 500-1500 shocks delivered over 30-60 minutes. The size and number of stones to be treated usually determines the extent of therapy. The patient may be either submerged in water bath (wet method device) or have water-filled compressible pads positioned in the appropriate area (dry method device). General, spinal, or epidural anesthesia is usually administered with this procedure. Several machines under investigation only require local anesthetics. ESWT treatments can be performed on an inpatient or outpatient basis. Following ESWT, most kidney stone fragments are eventually eliminated in the urine. Adjunctive procedures (e.g., pre-ESWT endoscopy or surgery) are estimated to be required in 7-15% of patients to ensure the complete removal of the stone fragments.
Extracorporeal Shock Wave Treatment (ESWT) for salivary stones is a minimally invasive treatment for symptomatic salivary stones that disintegrates or fragments stones so that spontaneous or induced salivation can flush out the sandy material. There are two types of lithotripters designed to deliver shock waves to a small focus, decreasing the chance of damaging adjacent tissue. Thus, it is possible to disintegrate salivary stones into concretions of < 2 mm in diameter. The goals of treatment are removal of stones, restoration of saliva flow, and relief of symptoms.
POLICYExtracorporeal shock wave therapy (ESWT), using either a high- or low-dose protocol or radial ESWT, is considered investigational as a treatment of musculoskeletal conditions, including but not limited to plantar fasciitis; tendinopathies including tendinitis of the shoulder, tendinitis of the elbow (lateral epicondylitis, tennis elbow), Achilles tendinitis, and patellar tendinitis; spasticity; stress fractures, delayed union and non-union of fractures; and avascular necrosis of the femoral head.
Extracorporeal Shock Wave Treatment (ESWT) is considered investigational for salivary stones.
Extracorporeal Shock Wave Treatment (ESWT) for kidney stones is considered eligible for coverage.
Federal Employee Program (FEP) may dictate that all FDA-approved devices, drugs or biologics may not be considered investigational and thus these devices may be assessed only on the basis of their medical necessity.
In 2000, Medstone, a manufacturer of an ESWT device, received FDA approval for ESWT in conjunction with urosdiol as a treatment of "symptomatic, solitary, radiolucent non-calcified gallstones (between 4 and 20 mm in maximum diameter) in adult patients for whom surgical removal of the gallbladder is medically contraindicated and in symptomatic high-risk patients who have actively refused surgery."
The coverage guidelines outlined in the Medical Policy Manual should not be used in lieu of the Member's specific benefit plan language.
Investigative is defined as the use of any treatment procedure, facility, equipment, drug, device, or supply not yet recognized as a generally accepted standard of good medical practice for the treatment of the condition being treated and; therefore, is not considered medically necessary. For the definition of Investigative, “generally accepted standards of medical practice” means standards that are based on credible scientific evidence published in peer-reviewed medical literature generally recognized by the relevant medical community, and physician specialty society recommendations, and the views of medical practitioners practicing in relevant clinical areas and any other relevant factors. In order for equipment, devices, drugs or supplies [i.e, technologies], to be considered not investigative, the technology must have final approval from the appropriate governmental bodies, and scientific evidence must permit conclusions concerning the effect of the technology on health outcomes, and the technology must improve the net health outcome, and the technology must be as beneficial as any established alternative and the improvement must be attainable outside the testing/investigational setting.
POLICY HISTORY3/1993: ESWT for Gallstones approved by Medical Policy Advisory Committee (MPAC)
9/1994: ESWT for Kidney Stone approved by Medical Policy Advisory Committee (MPAC)
4/6/2001: Policy reviewed; Title changed to "ESWT", ESWT for kidney stones policy combined with ESWT for gallstones policy, ESWT for salivary and pancreatic stones added to the policy, Managed Care Requirements deleted, Policy History updated, Sources updated
8/2001: Reviewed by MPAC; ESWT considered investigational for Musculoskeletal conditions, including, but not limited to, plantar fasciitis, chronic plantar fasciitis, heel pain syndrome, epicondylitis, tendonopathies including calcific tendinitis of the shoulder, stress fracture, delayed union and nonunion, and gallstones. Policy exception - FEP subscribers only - for ESWT treatment of gallstones added.
10/2/2001: New 2002 codes added
2/8/2002: Investigational definition added
4/22/2002: Type of Service and Place of Service deleted
5/7/2002: Code Reference section updated, ICD-9 diagnosis code 726.71, 726.72, 726.79, 726.90, 727.00, 727.01, 727.02. 727.03, 727.04, 727.05, 726.06, 727.09, 727.82, 728.71, 728.79, 728.86, 728.89, 729.4 added to non-covered codes
5/2002: Reviewed by MPAC, ESWT criteria for kidney stones deleted, ESWT for chronic plantar fasciitis considered medically necessary as an alternative to surgery with certain criteria, Sources updated, CPT code 0020T moved to covered.
5/29/2002: ICD-9 diagnosis code 593.89 added
6/6/2002: Code Reference section updated
9/20/2002: Code Reference section updated
11/2002: Reviewed by MPAC; no changes
2/3/2003: Code Reference section updated
3/17/2003: Code Reference section updated
4/8/2003: Code Reference section updated, CPT codes 28899, 52353 deleted, ICD-9 diagnosis codes 593.4, 593.81, 593.89 deleted, ICD-9 diagnosis code 726.71, 726.72, 726.79, 726.90, 727.00, 727.01, 727.02, 727.03, 727.04, 727.05, 727.06, 727.09, 727.82, 728.71, 728.79, 728.86, 728.89, 729.4, moved from non-covered to covered codes, ICD-9 diagnosis code 726.73, 788.0 added to covered codes
7/2003: Reviewed by MPAC; ESWT for pancreatic stones remains investigational, FEP exception added, Sources updated
11/2003: Reviewed by MPAC, Dornier Epos™ Ultra extracorporeal shock wave lithotripsy (ESWL) device added to “Description” , policy “Title’ changed from Extracorporeal Shock Wave Lithotripsy (ESWL) to Extracorporeal Shock Wave Treatment (ESWT), ESWL changed to ESWT as appropriate, hyperlink inserted, FEP exception musculoskeletal conditions added
1/21/2004: Code Reference section reviewed; no changes
1/23/2004: Code Reference section updated, ICD-9 diagnosis code range 727.00-727.09 listed separately, non-covered ICD-9 diagnosis codes 527.5, 574.20-574.21, 577.8, 719.47, 719.87, 726.10-726.12, 726.31, 726.32, 726.5, 726.61, 726.64, 726.8, 727.42, 727.60-726.69, 727.81, 727.89, 733.81, 733.82, 733.93, 733.94, 733.95 deleted, all non-covered codes were added 5-7-2002 except 574.00-574.91 code range added 4-8-2003 which was deleted also
6/4/2004: Code Reference section updated, ICD-9 diagnosis code 592.1, 592.9, 726.71, 726.72, 726.73, 726.79, 726.90, 727.00, 727.01, 727.02, 727.03, 727.04, 727.05, 727.06, 727.09, 727.82, 728.71, 728.79, 728.86, 728.89, 729.4, 788.0 deleted from covered codes
7/9/2004: FEP exception for kidney stones added
11/18/2004: Reviewed by MPAC, ESWT for pancreatic stones remains investigational
2/18/2005: Policy reviewed, Sources updated
7/19/2005: Code Reference section updated, CPT code 00872, 00873 added covered codes, ICD-9 procedure code 98.51, 98.59 description revised covered codes, CPT code 48999 added non-covered codes
3/24/2006: Coding updated. CPT4/HCPCS 2006 revisions added to policy
3/28/2006: Policy reviewed, no changes
10/16/2006: Peyronie's Disease added to the policy section as investigational
3/28/2007: Policy reviewed, no changes
6/15/2007: Policy reviewed, description updated to include musculoskeletal conditions plantar fasciitis and lateral epicondylitis. ESWT for plantar fasciitis changed to investigational. Removed the following policy statement: "Extracorporeal Shock Wave Treatment (ESWT) for chronic plantar fasciitis is considered medically necessary as an alternative to surgical therapy. Patients must meet the following criteria: (1) Symptoms persisiting for at least 6 months; AND (2) Lack a response to at least 3 other conservative treatments such as rest, physical therapy, anti-inflammatory medication, local corticosteriod injections, or heel orthotics."
7/19/2007: Reviewed and approved by MPAC
1/6/2009: Policy reviewed, no changes
04/22/2010: Policy description updated regarding FDA status of devices. Policy statement unchanged. FEP verbiage added to the Policy Exceptions section. Deleted outdated references from the Sources section.
08/02/2011: Policy revised to remove references to this procedure for Peyronie's Disease, pancreatic stones, and gallstones. Deleted the following procedure codes from the Code Reference section: 43265, 47999, 48999, 55899, S9034, and 98.52.
03/02/2012: Policy reviewed; no changes.
04/17/2013: Policy reviewed; no changes.
03/19/2014: Policy reviewed; no changes.
08/25/2015: Code Reference section updated for ICD-10.
03/02/2016: Policy title changed from "Extracorporeal Shock Wave Treatment for Plantar Fasciitis, Musculoskeletal and Other Conditions" to "Extracorporeal Shock Wave Treatment for Plantar Fasciitis and Other Musculoskeletal Conditions." Policy desctiption updated regarding tendinitis/tendinopathy syndromes, fracture nonunion and delayed union, and other musculoskeletal and neurologic conditions. Policy statement updated to add the following as investigational for ESWT: radial ESWT, Achilles tendinitis, patellar tendinitis, and spasticity. Investigative definition updated in policy guidelines section. Sources section updated to remove outdated reference.
05/24/2016: Code Reference section updated to add ICD-10 diagnosis code N20.1 as a covered code.
06/01/2016: Policy number added.
08/17/2016: Policy description updated regarding devices. Policy statements unchanged.
SOURCE(S)Blue Cross Blue Shield Association Policy # 2.01.40
CODE REFERENCEThis may not be a comprehensive list of procedure codes applicable to this policy.
The code(s) listed below are ONLY medically necessary if the procedure is performed according to the "Policy" section of this document.
All codes billed for ESWT for salivary stones for this investigational procedure are not eligible for coverage.
Other applications of ESWT as a treatment of musculoskeletal conditions are considered investigational, including but not limited to plantar fasciitis; tendinitis of the elbow (epicondylitis, tennis elbow), tendinopathies including tendinitis of the shoulder, stress fracture, delayed union and nonunion of fractures, and avascular necrosis of the femoral head.