Electrical Stimulation Guidance

by  Find-A-Code™
Apr 15th, 2026

Electrical stimulation refers to the use of controlled electrical currents applied to the body to stimulate nerves or muscles for therapeutic or diagnostic purposes. It can reduce pain, trigger muscle contractions, improve circulation, and support nerve function or retraining.

This type of therapy works by delivering small electrical impulses through electrodes placed on the skin (or sometimes implanted).

Common types are:

• Transcutaneous Electrical Nerve Stimulation (TENS): Used primarily for pain relief by blocking pain signals
• Spinal Cord Stimulator (SCS): device implanted directly into spine; used for neuropathy and for pain relief 
• Neuromuscular Electrical Stimulation (NMES): Causes muscle contraction; primarily used in rehab (e.g., after injury or stroke)
• Functional Electrical Stimulation (FES): Helps restore functional movement; often used in patients with neurologic conditions (e.g., foot drop)
• Interferential current (IFC): Uses intersecting currents for deeper tissue stimulation; often used in physical therapy
  High-voltage pulsed stimulation (HVPS): used for wound healing and edema control

Properly coding this type of therapy depends on:

• Type of stimulation being done (e.g., TENS)
• Direct vs indirect: supervised or constant one-on-one contact with the patient
• Time spent performing the service

CGS states the following regarding documentation requirements for electrical stimulation:

According to LCD L34049 “Outpatient Physical and Occupational Therapy Services” by CGS Administrators, “Most non-wound care electrical stimulation treatment provided in therapy is often provided in a supervised manner (after skilled application by the qualified professional/auxiliary personnel) without constant, direct contact required throughout the treatment.” Direct constant contact is less commonly performed and documentation should clearly describe that situation. 

LCD L34049 also provides the following guidance for Functional Electrical Stimulation (FES) or Neuromuscular Electrical Stimulation (NMES):

Alert: For Medicare, devices that utilize both ultrasound and electrical stimulation simultaneously (e.g., Medcosound, Rich-Mar) should NOT be billed separately for the same time period. They recommend reporting the stimulation instead of the ultrasound.

Coverage of Electrical Stimulation

Not every condition is covered and there may be differences between payers. The following information from CGS can be helpful: