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The rules say that plans must pay for a medical service or item if regular Medicare would pay for it in this case. 
You can find this rule at 42 Code of Federal Regulations (CFR) Section 422.101. 
 
The rules say Treatment of Muscle Atrophy: 
 
Coverage of NMES to treat muscle atrophy is limited to the treatment of disuse atrophy where nerve supply to 
the muscle is intact, including brain, spinal cord and peripheral nerves, and other non-neurological reasons for 
disuse atrophy. Some examples would be casting or splinting of a limb, contracture due to scarring of soft 
tissue as in burn lesions, and hip replacement surgery (until orthotic training begins). (See ?160.13 of the NCD 
Manual for an explanation of coverage of medically necessary supplies for the effective use of NMES.) 
 
 Use for Walking in Patients with Spinal Cord Injury (SCI): 
 
The type of NMES that is use to enhance the ability to walk of SCI patients is commonly referred to as 
functional electrical stimulation (FES). These devices are surface units that use electrical impulses to activate 
paralyzed or weak muscles in precise sequence. Coverage for the use of NMES/FES is limited to SCI patients 
for walking, who have completed a training program which consists of at least 32 physical therapy sessions 
with the device over a period of three months. The trial period of physical therapy will enable the physician 
treating the patient for his or her spinal cord injury to properly evaluate the person's ability to use these devices 
frequently and for the long term. Physical therapy necessary to perform this training must be directly performed 
by the physical therapist as part of a one-on-one training program. 
 
The goal of physical therapy must be to train SCI patients on the use of NMES/FES devices to achieve 
walking, not to reverse or retard muscle atrophy. 
 
Coverage for NMES/FES for walking will be covered in SCI patients with all of the following characteristics: 
 
1. Persons with intact lower motor units (L1 and below) (both muscle and peripheral nerve); 
    2. Persons with muscle and joint stability for weight bearing at upper and lower extremities that can 
demonstrate balance and control to maintain an upright support posture independently; 
    3. Persons that demonstrate brisk muscle contraction to NMES and have sensory perception electrical 
stimulation sufficient for muscle contraction; 
    4. Persons that possess high motivation, commitment and cognitive ability to use such devices for walking; 
    5. Persons that can transfer independently and can demonstrate independent standing tolerance for at least 3 
minutes; 
    6. Persons that can demonstrate hand and finger function to manipulate controls; 
    7. Persons with at least 6-month post recovery spinal cord injury and restorative surgery; 
    8. Persons without hip and knee degenerative disease and no history of long bone fracture secondary to 
osteoporosis; and 
    9. Persons who have demonstrated a willingness to use the device long-term. 
 
 NMES/FES for walking will not be covered in SCI patient with any of the following: 
 
    1. Persons with cardiac pacemakers; 
    2. Severe scoliosis or severe osteoporosis; 
    3. Skin disease or cancer at area of stimulation; 
    4. Irreversible contracture; or 
   5. Autonomic dysflexia. 
 
 The only settings where therapists with the sufficient skills to provide these services are employed, are 
inpatient hospitals; outpatient hospitals; comprehensive outpatient rehabilitation facilities; and outpatient 
rehabilitation facilities. The physical therapy necessary to perform this training must be part of a one-on-one 
training program. 
 
Additional therapy after the purchase of the DME would be limited by our general policies in converge of 
skilled physical therapy. 
 
You can find this information in Medicare's National Coverage Determination (NCD) for Neuromuscular 
Electrical Stimulation (NMES) (160.12). 
 
If you want to read these Medicare rules, you can go to this website www.medicareappeal.com.