Understand how clinical trial costs and insurance coverage work.
You never pay for the experimental treatment itself. The sponsoring company or institution provides the drug at no cost to you. That is true of all legitimate clinical trials.
Once the trial ends, things get more complicated (see below). While you are in the trial, the drug is free.
Many trials cover the cost of visits, lab work, scans, and other tests related to the trial. They should. Coverage varies, however, and you should ask before enrolling. Some trials cover everything. Some cover some things. Some ask the participant's insurance to cover certain things.
This is why you ask, in detail, what costs the trial covers and what your insurance will be billed for.
Many trials also reimburse travel, parking, or meals. Ask about this too. If you're traveling to a distant trial site, reimbursement can matter.
Reimbursement schedules vary by trial. Some trials repay driving at a set rate per mile; for reference, the IRS business mileage rate is 76 cents per mile for July through December 2026. Trials may also cover airfare, parking, tolls, meals, or hotel stays for distant visits, usually with receipts.
Some trials also pay a stipend for your time, and some help with childcare. Amounts vary widely, so do not assume a set rate. The full reimbursement schedule should appear in the informed consent document; ask the research coordinator for it before enrolling, not after.
These are typical ranges, not guarantees. Some trials reimburse generously, others sparingly, and a small number expect participants to absorb travel costs. For multi-year rare disease trials at distant academic centers, the difference between full and partial reimbursement can be thousands of dollars.
Several established nonprofit programs cover trial-related costs that the sponsor doesn't reimburse. The major ones every rare disease patient should know about:
Patient Advocate Foundation (PAF) provides case management and copay assistance for patients with chronic, life-threatening, or debilitating conditions. PAF's Co-Pay Relief funds have income limits of up to 400% of the federal poverty level, depending on the fund. PAF case managers can help locate other assistance programs and resolve insurance disputes around trial-related care.
The PAN Foundation offers disease-specific copay funds. Funds open and close based on available donor money, so checking the open-fund list near your enrollment date matters. HealthWell Foundation operates similarly with different disease-specific funds and income criteria.
NORD's Patient Assistance Programs cover medication costs, insurance premiums, and travel through more than 100 disease-specific programs. Mercy Medical Angels, which also runs the National Patient Travel Center, helps with free air travel, ground transportation, and gas cards for patients traveling to medical care.
Many drug manufacturers also run trial-specific patient support programs that cover travel, lodging, and ancillary costs even before the drug is approved. Ask the research coordinator at enrollment which programs the sponsor partners with for this trial; trial sites often have a financial counselor who can run applications for you.
Your health insurance is required to cover standard care and routine medical costs while you're in an approved clinical trial for cancer or another life-threatening condition. The Affordable Care Act requires this of most private plans, and since January 1, 2022 a separate federal law, the Consolidated Appropriations Act of 2021, has required it of Medicaid in every state. If you need blood work to check for side effects, insurance covers it. If you need imaging to monitor the trial's effectiveness, insurance covers it. If you need a procedure that you would have needed anyway as part of standard care for your condition, insurance covers it.
The one consistent exception is the experimental drug itself, which is never billed to insurance. The trial sponsor provides it.
The Medicaid rule applies to qualifying trials for serious or life-threatening conditions, and it covers only items and services Medicaid would cover outside the trial. Your state must decide on coverage within 72 hours, based on a form signed by your doctor and the trial's lead investigator. Triage Cancer keeps a state-by-state chart of Medicaid clinical trial coverage laws, and your disease-specific advocacy organization typically has the most current practical information about real-world coverage in your state.
Where you enroll affects your insurance bills too. If a trial is offered at multiple sites, ask each site's billing office for an estimate of out-of-pocket costs at that location before choosing.
Trial-related stipends paid to participants and caregivers are generally taxable income. If the stipends paid to you total $2,000 or more in 2026, the payer (the sponsor or the trial site) should send you a Form 1099-MISC early the next year, and you'll report the income on your federal tax return. Travel reimbursements that match documented expenses (mileage, parking, meals) are generally non-taxable, but per diem amounts that exceed your actual expenses may be taxable.
Out-of-pocket trial-related medical expenses (visits not covered by the sponsor, lodging beyond reimbursement caps) may qualify for the medical expense deduction on Schedule A if your total medical expenses exceed 7.5% of adjusted gross income.
Health Savings Accounts (HSAs) and Flexible Spending Accounts (FSAs) can typically be used for trial-related expenses that meet IRS qualified medical expense definitions, including some travel costs for medically necessary care. Your plan administrator can confirm what's eligible. IRS Publication 502 lists every qualified expense category.
What happens after the trial is one of the most important questions to ask before enrolling. Several pathways may apply, and they depend on whether the drug worked for you and whether the trial moved toward FDA approval.
Open-label extension trials are continuations of the original trial in which everyone, including patients who got placebo, receives the active drug after the blinded portion ends. Many late-stage rare disease trials build these in. Ask whether one exists for your trial before enrolling, since it materially changes the access picture.
FDA Expanded Access (also called compassionate use) lets patients with serious or life-threatening conditions access investigational drugs outside of a clinical trial. Your physician submits FDA Form 3926 on your behalf. In fiscal year 2023, the FDA allowed about 98% of the expanded access requests for drugs and biologics it received to proceed, but the manufacturer still has to agree to provide the drug, and not all do.
Right to Try Act of 2018 is a federal law that creates an alternate pathway for patients with a life-threatening condition, who have tried all approved treatments and cannot join a trial, to access investigational drugs that have completed Phase 1 testing. Right to Try bypasses FDA review, but the manufacturer still has to agree. FDA's public summary shows only a few drugs supplied this way each year (6 in 2025).
Named patient programs (sometimes called managed access programs) are sponsor-run programs that provide drugs to specific patients on a case-by-case basis after trial completion but before FDA approval. In the United States, these programs generally run under FDA expanded access rules.
The simplest path is FDA approval followed by standard prescription access. If the trial leads to approval and the drug works for you, you transition to normal pharmacy and insurance coverage. The other pathways exist for patients who responded during the trial but the drug is not yet approved, or for patients with conditions where formal approval may take years.
The investigational drug or device in a clinical trial is always provided at no cost to the patient. Most trials also cover protocol-specific tests, study visits, and procedures that would not be part of standard care. Routine medical care that the patient would have needed anyway is typically billed to insurance under the Affordable Care Act clinical trial coverage mandate. Out-of-pocket costs vary by trial and location, but most rare disease trials aim to minimize patient financial burden.
Yes. Under the Affordable Care Act, most U.S. health insurance plans are required to cover routine medical costs for participants in approved clinical trials. A separate federal law, the Consolidated Appropriations Act of 2021, made the same coverage mandatory for Medicaid in every state starting January 1, 2022. Routine costs include doctor visits, lab work, imaging, and procedures that you would have needed regardless of trial participation. The experimental drug itself is never billed to insurance because the sponsor provides it free.
Yes, clinical trial stipends paid to participants are generally taxable income. If stipends paid to you total $2,000 or more in 2026, the payer should send a Form 1099-MISC, and the income must be reported on the federal tax return. Travel reimbursements that match documented expenses (mileage, parking, meals) are generally non-taxable, but per diem amounts that exceed actual expenses may be taxable.
Clinical trial travel reimbursement varies by trial. It can include mileage, airfare, parking, meals, and hotel stays for distant visits, and some trials also pay a stipend for your time. For reference, the IRS business mileage rate is 76 cents per mile for July through December 2026. Payment amounts and the payment schedule should be listed in the informed consent form.
Continued access to a clinical trial drug after the study ends depends on the sponsor and the regulatory pathway. Many trials offer an open-label extension where all participants (including those on placebo) receive the active drug. After approval, the drug becomes available through standard pharmacy and insurance. Before approval, FDA Expanded Access (compassionate use) and the Right to Try Act provide alternate pathways for patients with serious conditions who responded to the drug but cannot continue through a trial.
Several patient assistance programs help with clinical trial costs. The Patient Advocate Foundation offers case management and copay help. The PAN Foundation and HealthWell Foundation operate disease-specific copay funds. NORD runs more than 100 disease-specific assistance programs that can help with medication costs and travel. Mercy Medical Angels, which also runs the National Patient Travel Center, helps with free air and ground travel to medical care. Many drug manufacturers also run trial-specific patient support programs covering travel, lodging, and ancillary costs.
Health Savings Accounts (HSAs) and Flexible Spending Accounts (FSAs) can typically be used for clinical trial-related expenses that meet IRS qualified medical expense definitions, including some travel costs for medically necessary care. IRS Publication 502 lists every qualified expense category. Plan administrators can confirm what is eligible under specific HSA and FSA plans, and out-of-pocket trial expenses may also qualify for the medical expense deduction on Schedule A if total medical expenses exceed 7.5% of adjusted gross income.