Does Medicare cover a TENS unit? What the rules say in 2026

Does Medicare cover a TENS unit?

Sometimes. Medicare covers a TENS unit only for certain kinds of pain, and only when its rules are met. This guide uses the policy as of the revision effective January 1, 2024, the current version in 2026.

The rule is a Local Coverage Determination, or LCD. It is called L33802 and is titled “Transcutaneous Electrical Nerve Stimulators (TENS).” It was first effective October 1, 2015. The page lists Florida under jurisdiction J-C, run by CGS Administrators as the DME MAC.

Coverage is never certain. A clinician’s records, the order, the supplier and your plan all matter. Ask your doctor or physical therapist, then check with Medicare at 1-800-MEDICARE. The Medicare Coverage Database page tells beneficiaries with coverage questions to call that number or visit Medicare.gov.

What kinds of pain does Medicare cover?

The policy covers two uses: chronic, intractable pain and acute post-operative pain. The LCD says: “A TENS is covered for the treatment of beneficiaries with chronic, intractable pain or acute post-operative pain when one of the following coverage criteria, I or II, are met.”

The policy also requires that the ordering practitioner be “the treating practitioner for the disease or condition justifying the need for the TENS unit.” A clinician who does not treat your pain cannot meet this rule.

Which pain does Medicare not cover?

Medicare does not cover chronic low back pain or headache. The LCD says that for chronic pain, the cause “must be a type that is accepted as responding to TENS therapy.” It gives examples of conditions for which TENS “is not considered to be reasonable and necessary” and says the list is not all-inclusive:

• headache
• visceral abdominal pain
• pelvic pain
• temporomandibular joint (TMJ) pain

The LCD adds: “TENS therapy for chronic pain that does not meet these criteria will be denied as not reasonable and necessary.”

Chronic low back pain is its own rule. A 2012 Medicare decision first limited TENS for it to an approved clinical study, and the policy now says it is denied. Read the full story in the TENS for lower back pain guide and in the post on Medicare and chronic low back pain.

A denial for Medicare payment does not mean a clinician cannot suggest TENS. It means Medicare will not pay under this rule.

How do the trial, rental and purchase work?

For chronic pain, you must try the unit first. The LCD says the unit “must be used by the beneficiary on a trial basis for a minimum of one month (30 days), but not to exceed two months. The trial period will be paid as a rental.”

During the trial, your treating practitioner watches how well the unit works. To cover a purchase, the practitioner “must determine that the beneficiary is likely to derive significant therapeutic benefit from continuous use of the unit over a long period of time.”

A 2012 Medicare transmittal explains the logic: “Since TENS falls within the durable medical equipment (DME) benefit, Medicare coverage results in purchase after a brief initial rental period.” See the TENS trial period guide for what a trial looks like. The DME glossary entry explains the term.

A unit with four leads can be used with two or four. If a practitioner orders it for four, the LCD says the “medical record must document why 2 leads are insufficient.”

What supplies does Medicare cover?

Medicare covers supplies only with a covered unit. The LCD says that reimbursement for supplies “is contingent upon use with a covered TENS unit.” Claims for supplies with no covered unit “will be denied.”

The LCD also says suppliers must contact you before they send a refill. It says suppliers “must not deliver refills without a refill request and an affirmative response from a beneficiary.” Contact about a refill can happen no sooner than 30 calendar days before the current supply is expected to end.

What paperwork does Medicare require?

Medicare requires a written order before the supplier delivers the unit. The LCD says: “A Standard Written Order (SWO) must be communicated to the supplier before a claim is submitted.” A written order prior to delivery must be received before the item is delivered, for items that need one.

Policy article A52520 says claims for items on the CMS list need a face-to-face encounter and a written order prior to delivery. It also says: “If a supplier delivers an item prior to receipt of a WOPD, it will be denied as not reasonable and necessary.” Ask your clinician whether your item is on that list.

The same article says the records must show the length of time you have had the pain. It also says the reevaluation at the end of the trial must indicate:

• how often you used the unit
• the typical duration of use each time
• the results (effectiveness of therapy)

A log from you helps with these three. Medicare’s rules are about medical necessity, so records matter. See the how to get a TENS unit guide and the Medicare and insurance coverage guide for the wider picture.

Who writes the rules, and which ones apply to me?

Two layers of rules apply. National rules apply everywhere. Local rules fill in the details for your region. The LCD lists these national Medicare documents as its base: sections 10.2, 160.7.1, 160.13, 160.27 and 280.13 of the National Coverage Determinations Manual.

National section 160.7.1 covers how a clinician checks if you are a good fit for a nerve stimulator. It says the technique “is used by the patient on a trial basis and its effectiveness in modulating pain is monitored by the physician, or physical therapist.” It also says: “if it produces no relief or greater discomfort than the original pain electrical nerve stimulation therapy is ruled out.” That means a trial can end with a clear answer of no.

The LCD is written by the DME MACs for their regions. Because Florida sits in jurisdiction J-C, the J-C contractor, CGS Administrators, owns the version that applies to Florida claims. Policies can change, so check the date on the version you read.

What should I ask my clinician before I start?

Ask questions that match the policy criteria. This list turns the rules into plain questions:

Bring your Medicare card and your plan card to the visit. Ask the supplier which one it bills. Write down the answers.

What about Medicare Advantage?

Check with your plan. Medicare Advantage plans may handle TENS units in their own way. Plans may have their own steps, supplier networks or approval rules. Ask your plan these questions:

1. Does the plan cover TENS units, and for which kinds of pain?
2. Does the plan require an approval before I get a unit?
3. Which suppliers can I use?
4. Does the plan cover a trial, and for how long?
5. Does the plan cover supplies, and how many each month?

What can I do if Medicare denies my claim?

You can appeal. For Original Medicare, Medicare.gov says the first level of appeal is called a redetermination. It says: “You must file your appeal by the date in the MSN” (your Medicare Summary Notice). A late appeal may still be heard if you show good cause for missing the deadline.

Medicare.gov says you will generally get a decision from the Medicare contractor “within 60 days after they get your appeal.” If your denial letter names LCD L33802 or TENS, ask your doctor to help you understand it. Ask your clinician about other options for your pain.

Next step

Talk with your doctor or physical therapist about whether your pain type fits the policy. Then call Analgesic Healthcare at (800) 749-1188 or use the contact page with questions about getting a TENS unit.

This page gives general information, not medical advice. Talk with your doctor or physical therapist about your own care, and follow your clinician's and your device's instructions. In an emergency, call 911.