--- title: "How many TENS supplies does Medicare allow each month?" description: "Medicare's TENS policy sets a usual maximum of one or two units of supply code A4595 per month by lead count. See the limits, refill rules and exclusions." url: https://analgesic.multisites.ai/medicare-tens-supply-limits publisher: Analgesic Healthcare phone: +1-800-749-1188 contact: https://analgesic.multisites.ai/contact --- Coverage and paperwork # How many TENS supplies does Medicare allow each month? As of the LCD revision effective January 1, 2024, Medicare's 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. Supplies are paid only with a covered TENS unit, and a supplier may not dispense more than a three-month quantity at a time. Published October 26, 20264 min read3 sources ![An older man opens a delivery package on his sofa](https://analgesic.multisites.ai/_astro/v3-post-supply-limits.IyTlGKoL_2sPYys.webp) ## 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? Unit type Usual maximum of A4595 Source 2 TENS leads One unit per month LCD L33802 4 TENS leads Two units per month LCD L33802 Use less than daily Billing frequency reduced proportionally LCD L33802 Lead wires (A4557) Replacement more often than every 12 months would rarely be reasonable and necessary LCD L33802 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](https://analgesic.multisites.ai/glossary/lead-wire) is the cable that connects an [electrode pad](https://analgesic.multisites.ai/glossary/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](https://analgesic.multisites.ai/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](https://analgesic.multisites.ai/glossary/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](https://analgesic.multisites.ai/clean-and-store-tens-electrode-pads). Our [guide to TENS electrode pads and supplies](https://analgesic.multisites.ai/guides/tens-electrode-pads-supplies-guide) 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](https://analgesic.multisites.ai/medicare-tens-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](https://analgesic.multisites.ai/contact). See also our [insurance coverage guide](https://analgesic.multisites.ai/guides/tens-unit-insurance-coverage). ## Questions people ask ### How many TENS supplies does Medicare allow per month? The LCD says the usual maximum is one unit of A4595 per month for 2 TENS leads and a maximum of two units of A4595 per month for 4 TENS leads. If use is less than daily, the billing frequency should be reduced proportionally. ### Does Medicare pay for TENS electrodes separately? Policy article A52520 says A4595 is an all-inclusive code that includes items such as electrodes, adhesive, skin preparation materials and batteries. It says there is no separate allowance for replacement electrodes, conductive paste or gel, replacement batteries or a battery charger. ### How often does Medicare replace lead wires? The LCD says replacement of lead wires (A4557) more often than every 12 months would rarely be reasonable and necessary. This is the usual rule as of the January 1, 2024 revision. Ask your practitioner about your own situation. ### Can a supplier ship TENS supplies automatically? The LCD says suppliers must contact the beneficiary and document an affirmative response before dispensing a refill, and must not automatically ship on a pre-determined basis. Items delivered without a valid, documented refill request will be denied. ## Terms on this page - [Local coverage determination](https://analgesic.multisites.ai/glossary/local-coverage-determination) - [Chronic low back pain](https://analgesic.multisites.ai/glossary/chronic-low-back-pain) - [Conductive garment](https://analgesic.multisites.ai/glossary/conductive-garment) - [Medicare Advantage](https://analgesic.multisites.ai/glossary/medicare-advantage) - [Electrode pad](https://analgesic.multisites.ai/glossary/electrode-pad) - [Lead wire](https://analgesic.multisites.ai/glossary/lead-wire) - [TENS unit](https://analgesic.multisites.ai/glossary/tens-unit) ## Sources 1. [CMS Medicare Coverage Database: LCD Transcutaneous Electrical Nerve Stimulators (TENS) (L33802)](https://www.cms.gov/medicare-coverage-database/view/lcd.aspx?lcdid=33802) 2. [CMS Medicare Coverage Database: Article Transcutaneous Electrical Nerve Stimulators (TENS) - Policy Article (A52520)](https://www.cms.gov/medicare-coverage-database/view/article.aspx?articleid=52520) 3. [University of Iowa Health Care: Transcutaneous electrical nerve stimulator (TENS)](https://uihc.org/health-topics/transcutaneous-electrical-nerve-stimulator-tens) Checked against the sources above on October 26, 2026. Coverage rules change, so check the linked page or your plan before you act. 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. ## Keep reading - [TENS unit electrode pads, lead wires and supplies: what you need and what Medicare saysA TENS kit has the unit, lead wires, electrode pads and a power source. Pads wear out as the adhesive fades. For covered use, Medicare's LCD L33802 sets a usual maximum of one unit of A4595 per month for 2 leads and two units for 4 leads. Lead wires, A4557, rarely need replacing more often than every 12 months.](https://analgesic.multisites.ai/guides/tens-electrode-pads-supplies-guide) - [Does insurance or Medicare cover a TENS unit? What the Medicare policy saysMedicare covers TENS units under its durable medical equipment benefit, but only for certain pain and only when its rules are met. As of the LCD revision effective January 1, 2024, Medicare covers chronic intractable pain and acute post-operative pain. It denies TENS for chronic low back pain. Other plans may differ, so check with your plan.](https://analgesic.multisites.ai/guides/tens-unit-insurance-coverage) - [Why Medicare does not cover TENS for chronic low back painAs of the Medicare LCD revision effective January 1, 2024, TENS for chronic low back pain will be denied as not reasonable and necessary. CMS allowed coverage only inside approved clinical studies from 2012, and that window ended in June 2015. Other pain types have their own rules.](https://analgesic.multisites.ai/medicare-tens-chronic-low-back-pain) - [What a 30-day TENS trial looks like under Medicare rulesFor chronic, intractable pain, the Medicare TENS policy says the beneficiary must use the unit on a trial basis for at least one month (30 days), but not more than two months. The trial is paid as a rental, and the treating practitioner monitors it to judge whether the unit modulates pain.](https://analgesic.multisites.ai/what-a-30-day-tens-trial-looks-like) - [Does Medicare cover a TENS unit? What the rules say in 2026Sometimes. Medicare's local policy (LCD L33802) covers a TENS unit for chronic, intractable pain or acute post-operative pain when set rules are met. It says TENS for chronic low back pain will be denied as not reasonable and necessary. Headache is also listed as not reasonable and necessary. Coverage is never certain.](https://analgesic.multisites.ai/guides/does-medicare-cover-tens-unit) - [A one-page TENS referral checklist for clinicsThis checklist lists what Medicare's TENS policy says the ordering practitioner and the record should show: the treating practitioner's order, the pain type and duration, prior treatments, a monitored trial, a signed order before delivery where required, and the reason for four leads. It covers documentation only.](https://analgesic.multisites.ai/tens-referral-checklist-for-clinics) ## Questions about your unit or a bill? Call toll free. For customer care, ask for extension 508. [Call (800) 749-1188](tel:+1-800-749-1188)[Pay invoice](https://ahcpatientservices.com/)