Quick answer
Yes. Laboratory services are one of the ACA’s essential health benefits, so health plans cover blood tests your doctor orders to diagnose, monitor or treat a condition. Some screening tests, like cholesterol, hepatitis C and HIV screening, are free preventive care. Other blood work usually counts toward your deductible, so you may pay the lab’s negotiated rate until you meet it.
Key takeaways
- ACA plans cover lab work, including blood tests, as an essential health benefit.
- Certain screening tests cost nothing when you use an in-network provider, even before you meet your deductible.
- Tests to check symptoms or manage a condition usually come with a deductible, copay or coinsurance.
- An out-of-network lab can cost much more, so ask where your blood is being sent.
- Medicare usually charges nothing for covered lab tests.
On this page
Free screening vs diagnostic tests
| Type of test | Examples | What you pay |
|---|---|---|
| Preventive screening | Cholesterol for adults of certain ages or at higher risk; type 2 diabetes for some adults who are overweight; hepatitis C for adults 18 to 79; HIV for ages 15 to 65; hepatitis B and syphilis for people at higher risk | Nothing, in network |
| Prenatal screening | Tests during pregnancy, like gestational diabetes and hepatitis B screening | Often nothing, as preventive care |
| Diagnostic or monitoring | Tests for symptoms, or to track diabetes, cancer or another condition | Your deductible, copay or coinsurance |
A free screening can turn into a bill. If your doctor adds tests at your checkup to look into a symptom or keep tabs on a condition, those tests may be billed as diagnostic. It’s fine to ask which tests are preventive before the blood draw.
What you’ll pay for other blood work
Diagnostic tests usually go toward your deductible. Until you meet it, you may pay the full negotiated rate. After that, you’ll usually pay coinsurance or a copay.
Where your blood goes matters. If your doctor’s office sends it to a lab outside your network, you could get a much bigger bill. Ask the office to use an in-network lab, or get your blood drawn at one.
If you have an ongoing condition
People with diabetes, cancer and other chronic conditions often need regular blood work, so lab costs add up. When you compare plans, look at how each one handles lab tests and whether they apply before or after the deductible. Pregnancy also brings regular blood tests; see maternity coverage explained. Blood work before an operation is usually part of your surgical care; see what type of health insurance covers surgery.
Claims and denials
Labs usually bill your insurer directly. If you’re asked to send a claim yourself, see how to file a health insurance claim. Lab claims are sometimes denied because of a coding problem, so ask your doctor’s office to check the codes before you appeal.
Medicare
Medicare Part B covers medically necessary lab tests your doctor orders, and you usually pay nothing for them.
If you don’t have insurance
Ask the lab for its cash price before the test, and compare a couple of labs. You can also ask for a good faith estimate before a scheduled service; if the bill comes in $400 or more over it, you can dispute it. See what if you can afford your medical bills out of pocket and health insurance for individuals.
For help choosing coverage, see bronze, silver, gold and platinum plans, comparing health insurance plans and the best health insurance companies.
Compare plans in your area: see quotes by ZIP code.
Frequently asked questions
Are blood tests free with insurance?
Screening tests on the preventive care list are free in network. Tests for symptoms or to monitor a condition usually cost something.
Why did I get a bill for blood work at my checkup?
Some tests were probably billed as diagnostic, not preventive. Call your doctor’s office and your insurer to check how they were coded.
Do blood tests count toward my deductible?
Diagnostic tests usually do. Preventive screenings are free, so there’s nothing to count.
Does Medicare pay for blood tests?
Yes. You usually pay nothing for covered lab tests your doctor orders.
Sources
This article is general information, not medical advice. Last reviewed September 2026.