Does Medicare Cover Heart Monitors: Part B, Part A, and Costs

Medicare does cover heart monitors when your doctor orders one to diagnose or manage a heart rhythm problem. Outpatient and at-home monitors fall under Part B, where you generally pay 20% of the Medicare-approved amount after meeting the $283 annual deductible. Monitoring that happens while you are admitted to a hospital is covered under Part A and is bundled into your inpatient deductible. What you actually pay depends on the device, where you receive it, and whether you have Original Medicare or a Medicare Advantage plan.

Which Heart Monitors Are Covered

Medicare’s National Coverage Determination 20.15 sets the framework for cardiac monitoring, with regional contractors filling in device-specific rules.¹ The devices that qualify include Holter monitors (usually worn 24 to 48 hours), patient-activated and auto-triggered event recorders, extended-wear adhesive patch monitors worn up to 14 or 30 days, mobile cardiac outpatient telemetry (MCOT) that transmits data in real time to a 24-hour monitoring center, and implantable loop recorders placed under the skin for longer-term recording.²

The type your doctor chooses depends on how often your symptoms happen. A Holter monitor works for daily symptoms; a patch monitor or MCOT makes sense when episodes are more than a day apart; an implantable loop recorder is reserved for fainting episodes suspected to be cardiac but too rare for shorter monitoring to catch.¹

Consumer Wearables Do Not Qualify

Smartwatches and fitness trackers with heart-rate or EKG features, including the Apple Watch, are not separately covered. CMS has determined that home devices producing readings for a doctor to review do not qualify as durable medical equipment; any related costs get folded into the physician’s service payment rather than reimbursed directly.³ If your watch flags an irregular rhythm, your doctor will still need to order a medical-grade monitor for a Medicare-covered diagnosis.

When Medicare Considers a Monitor Medically Necessary

Medicare will not pay for a heart monitor as a screening or wellness test. Your doctor must order it to investigate specific symptoms or manage a diagnosed condition. Covered reasons include fainting, dizziness, chest pain, palpitations, or shortness of breath that could point to an arrhythmia.¹ Monitoring after an ablation or arrhythmia surgery, adjusting antiarrhythmic medication, and looking for undiagnosed atrial fibrillation after a stroke of unknown cause also qualify.²

The ordering physician must be enrolled in Medicare, and the order needs to be a signed prescription or written directive, or the medical record must clearly reflect the doctor’s intent to order the test.⁴ If the record does not tie your symptoms to the reason for monitoring, Medicare can treat the test as screening and deny the claim.⁵

What You Pay Under Part B for an Outpatient Monitor

Most heart monitoring happens on an outpatient basis, so Part B is where most patients see the bill.⁶⁷ Under Original Medicare in 2026, you pay:

The $283 annual Part B deductible, if you have not already met it for the year.⁸
20% coinsurance on the Medicare-approved amount for the device, the recording, and the physician’s interpretation.

The deductible applies across all your Part B services for the year, not to each test separately. You will receive a Medicare Summary Notice after the claim is processed showing the approved amount and your share.

What You Pay Under Part A During a Hospital Stay

If you are formally admitted to a hospital and monitored during your stay, the cost falls under Part A. You pay a single inpatient deductible of $1,736 per benefit period in 2026, which covers all hospital services for the first 60 days. Heart monitoring is not billed as a separate line item. Longer stays trigger daily coinsurance: $434 per day for days 61 through 90, and $868 per day for lifetime reserve days after that.⁸ A benefit period starts the day you are admitted and ends after 60 consecutive days out of a hospital or skilled nursing facility.

Watch Out for Observation Status

You can spend a night or two in a hospital bed, hooked up to a heart monitor, and still be classified as an outpatient. That happens when no doctor has written an order to formally admit you.⁹ The bill looks very different. Under observation status, your monitoring and every other service are billed through Part B, so you owe 20% on each one rather than paying the single Part A deductible that covers everything.

Hospitals must give you a written Medicare Outpatient Observation Notice (MOON) no later than 36 hours after observation begins, and a staff member has to explain it to you and get your signature.¹⁰ Ask your care team directly what status you are in. The answer affects your immediate bill and also decides whether you can qualify later for skilled nursing facility coverage, which requires a three-day inpatient admission.

How Medigap and Medicare Advantage Change the Math

If you have Original Medicare plus a Medigap (Medicare Supplement) policy, the supplement can pick up some or all of the 20% coinsurance and deductibles you would otherwise owe.¹¹ The exact share depends on your plan letter. Plans C, D, F, and G cover the Part B coinsurance in full; other letters cover less. Check your plan’s benefit chart before the test.

Medicare Advantage (Part C) plans must cover the same heart monitors Original Medicare covers, but the process and price look different.¹² Many Advantage plans require prior authorization; skipping that step can result in a full denial, leaving you to pay the whole bill. Plans also often route you to specific in-network labs or monitoring companies, and out-of-network use may not be covered. Instead of 20% coinsurance, most Advantage plans charge a flat copayment for diagnostic cardiac tests, and the amount varies widely. Call your plan’s member services line or read the Evidence of Coverage before scheduling.

If Your Claim Is Denied

You have the right to appeal any denial. Under Original Medicare, the first step is a redetermination request to the Medicare Administrative Contractor that processed the claim, and you have 120 days from the date on the denial notice to file.¹³ If that is denied, four more appeal levels are available, ending in federal district court. The denial notice itself lists the next step and its deadline.

Under a Medicare Advantage plan, you or your doctor request a reconsideration from the plan within 60 days of the denial. The plan must respond within 30 days for a standard request, or 72 hours for an expedited request. If the plan upholds its denial, the case is automatically sent to an Independent Review Entity, and further levels mirror the Original Medicare process.¹⁴ Your denial letter, called a Notice of Denial of Medical Coverage or a Notice of Denial of Payment, will spell out the deadlines that apply to your situation.

1
Centers for Medicare & Medicaid Services. NCD – Electrocardiographic Services (20.15)
2
Centers for Medicare & Medicaid Services. Temporary Nontherapeutic Ambulatory Cardiac Monitoring Devices
3
Centers for Medicare & Medicaid Services. 2023 HCPCS Application Summary – Non-Drug and Non-Biological Items and Services
4
Centers for Medicare & Medicaid Services. Lab Test Order Requirements
5
Centers for Medicare & Medicaid Services. Complying with Signature Requirements for Diagnostic Tests
6
Office of the Law Revision Counsel. 42 USC 1395x – Definitions
7
Medicare.gov. Diagnostic Non-Laboratory Tests
8
Centers for Medicare & Medicaid Services. 2026 Medicare Parts A and B Premiums and Deductibles
9
Medicare. Inpatient or Outpatient Hospital Status Affects Your Costs
10
Centers for Medicare & Medicaid Services. Medicare Outpatient Observation Notice (MOON)
11
Medicare. Learn What Medigap Covers
12
eCFR. 42 CFR Part 422 – Medicare Advantage Program
13
Centers for Medicare & Medicaid Services. Medicare Parts A and B Appeals Process
14
Centers for Medicare and Medicaid Services. How Do I Appeal if I Have a Medicare Health Plan