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Sympathetic Therapy and Bioelectrical Nerve Block or Electroanalgesic Nerve Block for the Treatment of Pain

Policy Number: MP-015

Latest Review Date: July 2024

Category: Therapy                                                                 


Sympathetic therapy is considered investigational. 

Electroceutical therapy or electroanalgesic nerve block is considered investigational. 


Sympathetic therapy is a method of administering electrical current through the peripheral nerves of the lower legs and feet as well as the arms and hands creating a unique form of stimulation of the sympathetic nervous system.  The effect of Sympathetic Therapy is to normalize the sympathetic nervous system resulting in relief of chronic intractable pain.  The Sympathetic Therapy protocol uses four intersecting stimulation channels of various frequencies (8 electrodes per treatment) with specific electrode placement on the feet, legs, arms, and hands.  Treatment lasts for approximately one hour.  Multiple beat frequencies are generated between 0-1,000 Hz.  Electrodes are applied bilaterally following the peripheral nerve pathways from one side of the body to the other crossing the spine.  Therapy is delivered using the Dynatron STS device during the treatment plan development.  There are over 300 treatment protocols to choose from, therefore, the clinician will select the most appropriate protocol based on multiple factors including the location, and severity of the pain.  Adjustments to the treatment protocol continue to be made during the treatment plan development.  Usually, ten or more clinical treatments are required to complete the treatment plan.  Once the treatment plan has become developed, the Dynatron STS Rx home therapy device can be utilized to maintain pain relief.  The Dynatron STS (Dynatronics Corporation, manufacturer) device and a companion home device, Dynatron STS Rx, are devices that deliver sympathetic therapy.  These devices received U.S. Food and Drug Administration (FDA) clearance in March 2001 through a 510(k) process.  The FDA labeled indication is as follows: “Electrical stimulation delivered by the Dynatron STS and the Dynatron STS Rx is indicated for providing symptomatic relief of chronic intractable pain and/or management of post-traumatic or post-surgical pain.”

Electroceutical therapy, also known as bioelectric nerve block or electroanalgesic nerve block, involves blockade of axonal transmissions.  Electroceutical therapy has been used in the management of both non-malignant and malignant pain, acute and chronic pain.  Electroceutical medicine entails the use of various electrical modalities.  Electroceutical treatments use much higher electrical frequencies than transcutaneous electrical nerve stimulation (TENS) and are only prescribed and administered per a healthcare provider with expertise in this type of therapy.  This Electroceutical therapy is also known as bioelectric therapy, non-invasive neuron-blockade device, electroceutical neuron-blockade devices and bioelectric treatment.  One manufacturer of this electroceutical equipment is Biotronics Research and the device is known as Matrix II.


The most recent literature search was performed through July 5, 2024.

Summary of Evidence

Updated guidelines from the Work Loss Data Institute list sympathetic therapy as an intervention that is currently under study and not specifically recommended. 

There are no published randomized controlled clinical trials of the effectiveness of Sympathetic Therapy in the management of patients with chronic intractable pain. 

There remains a lack of scientific evidence to substantiate the validity of the claims of relief of pain and elimination or drastic reductions in pain medication requirements.  Well-designed, randomized controlled clinical studies are needed to determine the usefulness of electroceutical therapy in the treatment of individuals with acute or chronic pain.

U.S. Preventative Services Task Force Recommendations

Not applicable.


Sympathetic Therapy, Dynatron STS™, Dynatron STS Rx™, electroceutical therapy, bioelectric nerve block, non-invasive neuron-blockade devices, electroceutical neuron-blockade devices, electric analgesic nerve block, bioelectric treatment systems


Dynatron STS received U.S. Food and Drug Administration (FDA) clearance in March 2001 through a 510(k) process. 

Matrix II is approved for sale in Canada


Coverage is subject to member’s specific benefits.  Group-specific policy will supersede this policy when applicable.

ITS: Home Policy provisions apply

FEP: Special benefit consideration may apply.  Refer to member’s benefit plan.


CPT Codes:                   

At this time there are not specific CPT/HCPCS codes for this service. 

Physical Therapy for the treatment plan: 


Unlisted physical medicine rehab service or procedure

Manufacturer suggested CPT Code:  


Unlisted procedure, nervous system.




Unlisted Durable Medical Equipment


  1.  Dynatronics, May 29, 2001,
  2.  Guido, M.D., Ernesto H.  Effects of sympathetic therapy on chronic pain in peripheral neuropathy subjects. Am J. Pain Mgt. January 2002;12(1):31-34.  
  3.  IOM (Institute of Medicine). 2011. Clinical Practice Guidelines We Can Trust. Washington, DC: The National Academies Press.
  4.  Sacks, M.D., Steven M., et al.  Retrospective study of sympathetic therapy for pain attenuation in 197 patients. Unplished. Accessed on the manufacturer’s website.
  5. Schwartz Robert G.  Electric sympathetic block:  Current theoretical concepts and clinical results, Journal of Back and Musculoskeletal Rehabilitation 1998; 10: 31-46. 
  6. Work Loss Data Institute. Pain 2006; National Guideline Clearinghouse. Available at:


Medical Policy Group, July 2001

Medical Policy Group, January 2003

Medical Policy Group, February 2004

Medical Policy Group, September 2005 (1)

Medical Policy Administration Committee, October 2005

Available for comment October 12-November 28, 2005

Medical Policy Group, February 2006 (1)

Medical Policy Administration Committee, March 2006

Medical Policy Group, February 2007 (1)

Medical Policy Group, February 2008 (1)

Medical Policy Group, February 2009 (1)

Medical Policy Group, February 2010 (1) Active Policy but no longer scheduled for regular literature reviews and updates effective February 23, 2010.

Medical Policy Group, June 2019 (3): 2019 Updates to Key Points, References and Key Words: added bioelectric treatment systems. A peer-reviewed literature analysis was completed and no new information was identified that would alter the coverage statement of this policy.

Medical Policy Group, July 2021 (3): 2021 Updates to Key Points. A peer-reviewed literature analysis was completed and no new information was identified that would alter the coverage statement of this policy. Policy statement updated to remove “not medically necessary, “no other changes to policy statement or intent.

Medical Policy Group, June 2022 (3): 2022 Updates to Key Points and References. Reviewed by consensus. A peer-reviewed literature analysis was completed and no new information was identified that would alter the coverage statement of this policy.

Medical Policy Group, July 2023 (3): 2023 Updates to Key Points, Benefit Applications and, References. Reviewed by consensus. A peer reviewed literature analysis was completed, and no new information was identified that would alter the coverage statement of this policy.

Medical Policy Group, July 2024 (3):  Updates to References. Reviewed by consensus. A peer reviewed literature analysis was completed and no new information was identified that would alter the coverage statement of this policy.

This medical policy is not an authorization, certification, explanation of benefits, or a contract. Eligibility and benefits are determined on a case-by-case basis according to the terms of the member’s plan in effect as of the date services are rendered. All medical policies are based on (i) research of current medical literature and (ii) review of common medical practices in the treatment and diagnosis of disease as of the date hereof. Physicians and other providers are solely responsible for all aspects of medical care and treatment, including the type, quality, and levels of care and treatment.

This policy is intended to be used for adjudication of claims (including pre-admission certification, pre-determinations, and pre-procedure review) in Blue Cross and Blue Shield's administration of plan contracts.

The plan does not approve or deny procedures, services, testing, or equipment for our members. Our decisions concern coverage only. The decision of whether or not to have a certain test, treatment or procedure is one made between the physician and his/her patient. The plan administers benefits based on the member's contract and corporate medical policies. Physicians should always exercise their best medical judgment in providing the care they feel is most appropriate for their patients. Needed care should not be delayed or refused because of a coverage determination.

As a general rule, benefits are payable under health plans only in cases of medical necessity and only if services or supplies are not investigational, provided the customer group contracts have such coverage.

The following Association Technology Evaluation Criteria must be met for a service/supply to be considered for coverage:

1. The technology must have final approval from the appropriate government regulatory bodies;

2. The scientific evidence must permit conclusions concerning the effect of the technology on health outcomes;

3. The technology must improve the net health outcome;

4. The technology must be as beneficial as any established alternatives;

5. The improvement must be attainable outside the investigational setting.

Medical Necessity means that health care services (e.g., procedures, treatments, supplies, devices, equipment, facilities or drugs) that a physician, exercising prudent clinical judgment, would provide to a patient for the purpose of preventing, evaluating, diagnosing or treating an illness, injury or disease or its symptoms, and that are:

1. In accordance with generally accepted standards of medical practice; and

2. Clinically appropriate in terms of type, frequency, extent, site and duration and considered effective for the patient’s illness, injury or disease; and

3. Not primarily for the convenience of the patient, physician or other health care provider; and

4. Not more costly than an alternative service or sequence of services at least as likely to produce equivalent therapeutic or diagnostic results as to the diagnosis or treatment of that patient’s illness, injury or disease.