This article is general education, not legal, financial, or insurance advice. Deductibles, out-of-pocket maximums, and payer rules change annually and by plan — verify current figures with your insurer, CMS, or HHS before making a financial decision.

Patient responsibility is the part of a medical bill you owe after insurance has paid its share, based on your plan’s deductible or coinsurance. It isn’t the same as the sticker price of the service, and it isn’t optional once your plan has processed the claim. CMS

Patient Responsibility, Defined

Patient responsibility is the dollar amount a patient owes a provider after the health plan applies its contracted rate and cost-sharing rules. It’s the portion of a bill a patient is legally obligated to pay out of pocket after insurance has processed the claim — even insured patients rarely have 100% of costs covered. If you have no coverage, the entire billed amount typically becomes your responsibility, subject to any hospital financial assistance program. CMS

What Counts as Patient Responsibility

Deductible. The amount you pay before your plan starts sharing costs. A deductible is what you pay for certain medical expenses before your plan starts paying anything. For Medicare Part B in 2026, that’s $283 a year. Federal Register

Copay. A fixed dollar amount for a specific service — for example, a $20 charge for a covered visit — that usually applies after the deductible is met. Federal Register

Coinsurance. A percentage split of the remaining cost. Under Medicare Part B, once the deductible is met, coinsurance is 20% of the Medicare-approved amount for each covered service. CMS

Non-covered and denied charges. Services outside your plan’s coverage, or claims denied for medical necessity or authorization issues, become fully patient-owed unless successfully appealed.

The uninsured/self-pay exception. Uninsured patients are legally obligated to pay 100% of their bill, though hospital charity-care policies (below) can reduce or eliminate that amount for qualifying patients. CMS

How Patient Responsibility Is Calculated

Your health plan calculates this figure after adjudicating the claim, and it shows up two places: your Explanation of Benefits (EOB) and your provider bill.

The role of the EOB. An Explanation of Benefits is a notice from your health plan showing the cost of care you received, what the plan agreed to pay, and what you owe, if anything — and it is not the same document as a bill. CMS

Why the estimate and the final bill can differ. The EOB reflects the plan’s calculation at claim time. A provider bill can arrive later, reflect additional charges, or get corrected — which is why patient responsibility often includes not just deductible and coinsurance but any non-covered charges added after adjudication. CMS

2026 Cost-Sharing Numbers to Know

Figures below are current as of this writing and apply to specific plan types — they don’t transfer across plan types.

Plan type	2026 figure	Applies to
Medicare Part A	$1,736 deductible per benefit period	Inpatient hospital stays
Medicare Part B	$283 annual deductible, 20% coinsurance after	Outpatient/physician services; no annual out-of-pocket cap
Medicare Part D	$2,100 out-of-pocket cap	Prescription drugs
Medicare Advantage	$9,250 in-network cap	Combined Part A/B services, in-network
ACA marketplace	$10,600 individual / $21,200 family	Essential health benefits, in-network

A note on the ACA figure: HHS originally announced $10,150/$20,300 for 2026, then revised these upward under a new premium-growth methodology. Confirm the figure your plan is actually using, since some plans may have finalized documents under the earlier number.

When You Can Push Back on Patient Responsibility

Patient responsibility isn’t always the final word. Federal law limits it in specific situations.

The No Surprises Act and balance billing. The federal No Surprises Act bans balance billing for emergency services, non-emergency care from out-of-network providers at in-network facilities, and air ambulance services, and caps your cost-sharing at the in-network rate. Ground ambulance rides are a notable exception: the law doesn’t extend the same balance-billing ban to ground transport, so an out-of-network ground ambulance can still bill you the difference unless your state has its own protections. If a bill violates the federal ban, you can file a complaint with CMS at 1-800-985-3059 or through cms.gov’s complaint portal. CMS No Surprises ActCMS No Surprises Act

Good Faith Estimates. Uninsured and self-pay patients must be told, before scheduling, that they’re entitled to a written Good Faith Estimate of expected charges. If the final bill exceeds that estimate by $400 or more, you can dispute it, generally within 120 days of the bill. CMS

Hospital financial assistance policies. Nonprofit hospitals must maintain a written financial assistance policy offering free or discounted care to patients who meet eligibility criteria and can’t afford to pay. Before pursuing aggressive collection actions, the hospital must make a reasonable effort to determine whether you qualify for that assistance. Ask for the FAP application before assuming your full balance is owed. IRSCongress.gov

Common Mistakes Patients and Billing Staff Make

• Treating the EOB estimate as a final bill instead of confirming with the provider.
• Assuming Medicare has an annual cap the way marketplace and Medicare Advantage plans do — it doesn’t, for Parts A and B.
• Paying a balance bill for out-of-network emergency care without checking No Surprises Act protections first.
• Not requesting a Good Faith Estimate before a self-pay procedure.
• Assuming financial assistance is only for the uninsured — many FAPs also cover underinsured patients with high balances.

FAQs

Is patient responsibility the same as my deductible?
No. Deductible is one component. Patient responsibility can also include coinsurance, copays, and non-covered charges on top of the deductible.

Can a hospital send my balance to collections immediately?
Not for FAP-eligible patients. Hospitals must make reasonable efforts to check financial assistance eligibility before extraordinary collection actions, and must generally wait a set period after the first post-discharge bill. Congress.gov

Does Medicare have an out-of-pocket maximum?
Original Medicare Parts A and B do not. Your 20% Part B coinsurance has no built-in ceiling. Medicare Advantage and Part D do carry annual caps. CMS

Methodology: figures and rules in this article are drawn from CMS.gov, the Federal Register, HHS’s Notice of Benefit and Payment Parameters, and IRS.gov guidance on Section 501(r). Where sources conflicted (the ACA out-of-pocket maximum), both figures are disclosed.

Last updated: July 29, 2026. Reviewed for accuracy against current CMS and HHS publications