How many TENS supplies does Medicare allow each month?

How many TENS supplies does Medicare allow each month?

The usual maximum is one unit of supply code A4595 per month for a 2-lead TENS unit, and two units per month for a 4-lead unit. This comes from the Medicare local coverage determination (LCD) L33802, revision effective January 1, 2024. The LCD says the allowance is for “replacement supplies when they are reasonable and necessary and are used with a covered TENS.”

This post covers Original Medicare. For Medicare Advantage, Medicaid, VA, workers’ compensation or a commercial plan, check with your plan. It is general information, not a statement about your claim.

What are the usual maximums?

A 4-lead unit may be used with either 2 or 4 leads. The LCD says that if it is ordered for use with 4 leads, “the medical record must document why 2 leads are insufficient to meet the beneficiary’s needs.” A lead wire is the cable that connects an electrode pad to the TENS unit.

What does one A4595 unit include?

A4595 is an all-inclusive supply code. Policy article A52520 says it includes electrodes (any type), conductive paste or gel if needed, tape or other adhesive if needed, adhesive remover, skin preparation materials, batteries, and a battery charger if rechargeable batteries are used.

The same article lists items with no separate allowance:

• Replacement electrodes (A4556), conductive paste or gel (A4558), replacement batteries (A4630), and a battery charger. The article says “There should be no billing and there will be no separate allowance” for these.
• Adapters (snap, banana, alligator, tab, button, clip), belt clips, adhesive remover, additional connecting cable for lead wires, carrying pouches, and covers.

So when a patient asks whether Medicare pays for electrodes, the answer under this policy is that electrodes are part of the A4595 supply allowance, not a separate line.

Why does Medicare set these limits?

The LCD gives a plain reason for the refill rules. They exist “to ensure that the refilled item remains reasonable and necessary, existing supplies are expected to end, and to confirm any changes or modifications to the order.” In short, the policy ties each shipment to real use. The LCD also says suppliers “must not dispense a quantity of supplies exceeding a beneficiary’s expected utilization.”

What about supplies during a rental or after a purchase?

Policy article A52520 says: “During the rental of a TENS unit, supplies for the unit are included in the rental allowance.” If a TENS unit is purchased, “the allowance is all-inclusive of items such as lead wires and one month’s supply of items such as electrodes, conductive paste or gel (if needed), and batteries.” Monthly A4595 supplies then follow for the purchased unit, up to the usual maximum.

The LCD also says: “Reimbursement for supplies is contingent upon use with a covered TENS unit.” It adds that claims for TENS supplies “provided when there is no covered TENS unit will be denied as not reasonable and necessary.” For how the trial rental works, read what a 30-day TENS trial looks like.

What are the refill rules?

The LCD sets rules for recurring supplies. This is the part of the policy revised effective January 1, 2024.

1. No automatic shipping. Suppliers must contact the beneficiary, and document an affirmative response, before dispensing the refill. They must “not automatically ship on a pre-determined basis, even if authorized by the beneficiary.”
2. A contact window. Contact about refills must take place “no sooner than 30 calendar days prior to the expected end of the current supply.”
3. A delivery window. The supplier must deliver “no sooner than 10 calendar days prior to the expected end of the current supply.”
4. A quantity cap. “Regardless of utilization, a supplier must not dispense more than a three (3) - month quantity at a time.”
5. A check on use. Suppliers must stay attuned to changed or atypical utilization and verify with the treating practitioner that it is warranted.

Items delivered without a valid, documented refill request will be denied as not reasonable and necessary.

Does a conductive garment count as a supply?

A conductive garment (E0731) is separate. The LCD says it is “rarely reasonable and necessary” and is covered only if all of its listed conditions are met. Our glossary defines a conductive garment. Ask your practitioner if you think you need one.

What if you buy supplies outside Medicare?

University of Iowa Health Care says: “Look in your TENS unit manual to learn how you can get more TENS supplies.” It suggests going back to the vendor where you bought the unit, and checking that patches work with your unit. For how to care for pads, see our post on how to clean and store TENS electrode pads. Our guide to TENS electrode pads and supplies goes further.

The same policy covers the unit. Remember that the LCD ties supplies to a covered unit, and it denies TENS for chronic low back pain. Read why Medicare does not cover TENS for chronic low back pain.

Next step

Ask your practitioner and your supplier which supply code and quantity apply to your unit, and check your plan’s rules. For general questions, call Analgesic Healthcare at (800) 749-1188 or use contact. See also our insurance coverage guide.

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.