Does Insurance Cover Dialysis? Medicare, Medigap, and Denials

Does insurance cover dialysis? In almost every case, yes. Medicare, Medicaid, employer-sponsored group plans, and ACA marketplace policies all cover dialysis treatment, and federal law bars private insurers from denying coverage or singling out kidney failure patients for worse benefits. The harder question is what you’ll still owe. Even with solid coverage, the 20% coinsurance Medicare charges for each treatment adds up quickly when you’re in a chair three times a week, and total annual healthcare costs for people with end-stage renal disease (ESRD) average between roughly $69,000 and $94,000 depending on the type of coverage.¹

What Medicare Covers and What You Pay

Medicare is the primary insurer for most dialysis patients in the United States. The usual age-65 rule doesn’t apply here: anyone with permanent kidney failure who needs regular dialysis can enroll regardless of age, as long as you or a qualifying family member has sufficient work history under Social Security.²

Once you’re enrolled, Part B pays for outpatient dialysis at a facility, home dialysis training, home dialysis equipment and supplies, and injectable drugs like erythropoiesis-stimulating agents given during treatment.³ Part A covers inpatient hospital care, and Part D helps pay for prescription drugs you take at home that aren’t administered during a dialysis session.⁴

Here’s the cost reality. Part B pays 80% of the Medicare-approved amount for dialysis. You pay the remaining 20% coinsurance, every session, after meeting the annual Part B deductible.⁵ For 2026, the Part B deductible is $283 and the standard monthly premium is $202.90.⁶ Original Medicare has no annual out-of-pocket cap, so that 20% keeps running with no ceiling. For a patient on Medicare alone, this is the single biggest financial risk, and it’s the reason supplemental coverage matters so much.

When Medicare Starts and Who Pays First

Medicare coverage for ESRD does not begin the day you start dialysis. The standard rule: coverage begins on the first day of the fourth month after you start a regular course of treatment. The clock runs even if you haven’t yet signed up.⁷

You can skip the waiting period if you enroll in a home dialysis training program at a Medicare-certified facility during your first three months of treatment, your doctor expects you to complete the training and dialyze at home, and you keep a regular schedule. Meeting those conditions lets coverage begin the same month you start regular dialysis.² Coverage can also start earlier if you’re admitted for a kidney transplant.

You still need coverage during those first months. Employer insurance covers dialysis during this period. Medicaid can bridge the gap for people who qualify, and roughly half of ESRD patients rely on Medicaid at some point.⁸

Then there’s the coordination rule for people with job-based coverage. If you have employer-sponsored insurance when you’re diagnosed with ESRD, Medicare does not immediately become the primary payer. Federal law requires your employer’s group health plan to remain primary for up to 30 months. During that window, your employer plan pays first and Medicare pays secondary, covering some of what the group plan leaves behind.⁹ The same rule applies if you’re on COBRA. After 30 months, the roles switch: Medicare becomes primary and the employer plan becomes secondary.¹⁰

The practical point: keep your employer coverage active during the coordination period if you can. Dropping it leaves you with Medicare’s uncapped 20% coinsurance.

What Private and Marketplace Plans Must Cover

If you’re not yet eligible for Medicare, or you’re still in the waiting period, private insurance is where you start. The Affordable Care Act bars insurers from denying coverage or charging more because of a pre-existing condition like kidney failure.¹¹ Marketplace plans and most employer plans cannot refuse to pay for kidney-failure-related treatment once you’re enrolled.¹² The one exception is grandfathered plans that existed before the ACA took effect; those aren’t required to cover pre-existing conditions.

Dialysis counts as an essential health benefit under the ACA, so marketplace plans must cover it. Federal rules also prohibit plan designs that discriminate based on a patient’s health condition, which means a plan can’t quietly structure its benefits to shut dialysis patients out.

ESRD patients get an additional layer of protection. Under the Medicare Secondary Payer statute, group health plans cannot single out people with kidney failure for worse benefits. A plan can’t impose a higher deductible for dialysis, cover fewer services for kidney patients, or design benefits in any way that treats ESRD patients differently from other members. Plans also can’t reduce or drop your coverage because you became Medicare-eligible due to ESRD.⁹ A plan can offer modest dialysis coverage to everyone equally; what it can’t do is target ESRD patients.

For 2026, ACA-compliant plans cap total out-of-pocket spending at $10,600 for individual coverage and $21,200 for family coverage. Once you hit the cap, the plan pays 100% of remaining eligible costs for the year. Not everything counts toward that ceiling, though: out-of-network charges, non-covered services, and some prescription drug spending can still land on you.

Medicaid and Dual Eligibility

Medicaid is a lifeline for dialysis patients with limited income. Most commonly, it supplements Medicare. For patients who have both (called “dual eligible”), Medicaid typically picks up the 20% Medicare coinsurance on dialysis, the Part B deductible, and often the Part B premium, cutting out-of-pocket costs on covered services to near zero.¹³

Rules and income limits vary by state. States that expanded Medicaid under the ACA extend coverage to people who wouldn’t qualify under traditional rules. Many state Medicaid programs also cover transportation to dialysis appointments, which matters when you’re making the trip three times a week. For patients whose Medicare hasn’t started, Medicaid may be the sole payer during the gap.⁸

Medigap for the Medicare 20%

Because Medicare’s 20% coinsurance has no annual cap, many dialysis patients turn to Medigap (Medicare Supplement) policies to cover the gap. A Medigap plan can pay some or all of your Part B coinsurance and deductibles.

Access is the problem. Federal law guarantees you can buy a Medigap policy without medical underwriting during a six-month window that opens when you turn 65 and enroll in Part B.¹⁴ But many ESRD patients are under 65, and federal law does not require Medigap insurers to sell policies to Medicare beneficiaries younger than 65. Roughly 31 states have their own rules requiring at least some Medigap availability for younger beneficiaries, but what’s available varies widely and premiums are often significantly higher. If you’re under 65 with ESRD and your state doesn’t mandate access, you may not be able to buy a Medigap policy at all.

When an ESRD patient does reach 65, the Medigap open enrollment window starts fresh and insurers must offer policies at standard rates regardless of health history.¹⁴ Miss that window and insurers can deny you or charge more based on your health.

Common Limits That Still Cost You Money

Having coverage isn’t the same as paying nothing. The restrictions that trip up dialysis patients most often:

Network limits. Many plans only cover dialysis at in-network facilities. Going out-of-network can mean higher coinsurance, balance billing, or outright denial. Narrow networks also force some patients into longer travel times.
Prior authorization. Insurers may require approval before dialysis begins or before you switch treatment types. Routine approvals can take 15 days or more; urgent requests must be handled within 72 hours.
Home dialysis equipment. Medicare covers home machines, supplies, and maintenance, but some private plans treat home equipment under separate approval rules or reimbursement rates.
Short-term and limited-benefit plans. Plans that don’t comply with the ACA, including short-term policies and some grandfathered employer plans, may cap the number of dialysis sessions per year or set dollar limits on reimbursement.
Transportation and take-home drugs. Most private plans exclude non-emergency transportation to and from dialysis. Prescription drugs taken at home usually fall under a separate formulary with its own cost-sharing.
Travel. Dialysis at a temporary clinic outside your plan’s network can trigger out-of-network charges or denial. Arrange sessions at least two weeks ahead, and longer for distant trips. For international travel, many insurers require prior authorization or provide no coverage at all, and Medicare generally does not cover care outside the United States.

Read your plan’s Summary of Benefits and Coverage before treatment starts so you know what requires prior authorization and which facilities are in-network.

Help Paying Premiums

Several programs help dialysis patients cover premiums and out-of-pocket costs. The American Kidney Fund’s Health Insurance Premium Program (HIPP) pays insurance premiums for qualifying ESRD patients. HIPP can help with Medicare Part B premiums, Medigap premiums, marketplace plan premiums, employer contributions, COBRA payments, and Medicaid premiums in states that charge them, up to two types of insurance per patient.¹⁵

To qualify, you must live and receive dialysis in the United States, meet the eligibility rules of the plan you need help paying for, and show financial need based on household income, expenses, and liquid assets. Applications are processed first-come, first-served through AKF’s online system, and you’ll need a recent insurance bill no more than 90 days old.¹⁵

State Medicaid programs can also pay Medicare premiums, deductibles, and coinsurance for dual-eligible patients. Some states run additional assistance programs for residents with high medical costs. The dialysis social worker at your treatment facility is usually the fastest route to finding out what’s available in your area.

If a Dialysis Claim Is Denied

If your insurer denies a dialysis claim or pays less than expected, start with the Explanation of Benefits. It lists the specific reason, which is usually a missing prior authorization, a medical-necessity determination, or out-of-network billing. Compare that reason against your plan’s Summary of Benefits and Coverage. Insurers get this wrong more often than you might expect.

If the denial looks wrong, file an internal appeal with the insurer. Include a written explanation, supporting medical records, your doctor’s statement, and the treatment plan. The insurer must decide within 30 days for claims requiring prior authorization and 60 days for claims already submitted. For urgent situations like ongoing life-sustaining dialysis, the response must come within 72 hours.¹⁶

If the internal appeal fails, you can request an external review by an independent third-party organization unaffiliated with the insurer. The reviewer’s decision is binding.¹⁶ State insurance departments oversee the process and can help you navigate it. For dialysis claims, external review tends to go in the patient’s favor when the medical documentation is clear, so make sure your nephrologist provides detailed records showing why ongoing treatment is necessary.

1
USRDS. Healthcare Expenditures for Persons With ESRD
2
Medicare.gov. End-Stage Renal Disease
3
eCFR. 42 CFR 410.52 – Home Dialysis Services, Supplies, and Equipment
4
Centers for Medicare & Medicaid Services. Medicare Coverage of Kidney Dialysis and Kidney Transplant Services
5
Medicare.gov. Dialysis Services and Supplies
6
Centers for Medicare & Medicaid Services. 2026 Medicare Parts A and B Premiums and Deductibles
7
Centers for Medicare & Medicaid Services. End-Stage Renal Disease (ESRD)
8
Dialysis Patient Citizens. About Medicaid for Dialysis Patients
9
Centers for Medicare & Medicaid Services. Medicare Secondary Payer
10
Social Security Administration. POMS HI 00620.177 – Medicare as Secondary Payer for End Stage Renal Disease Beneficiaries and for Employed Beneficiaries Age 65 or Over
11
HealthCare.gov. Coverage for Pre-Existing Conditions
12
U.S. Department of Health and Human Services. Pre-Existing Conditions
13
American Kidney Fund. Medicaid: A Lifeline for Kidney Patients
14
Centers for Medicare & Medicaid Services. Medigap Bulletin Series – Timing of the Six-Month Medigap Open Enrollment Period
15
American Kidney Fund. Health Insurance Premium Program (HIPP)
16
Centers for Medicare & Medicaid Services. Internal Claims and Appeals and the External Review Process Overview