What Labcorp does and who uses it
Labcorp is a private clinical laboratory company that processes blood tests, drug screenings, DNA tests, and other diagnostic samples for doctors, employers, and individuals. You encounter Labcorp when your doctor orders a test, when an employer requires a pre-employment screening, or when you order a test directly through their consumer portal. Labcorp operates thousands of patient service centers across the United States where you go to have blood drawn or provide a sample.
Labcorp is one of two largest clinical laboratory networks in the country. The company does not diagnose conditions or treat patients — it receives samples, runs tests in its laboratories, and sends results back to the doctor or organization that ordered the test. If your doctor says "I'm sending you to get labs done," they often mean Labcorp or a similar lab, and you'll receive instructions on where to go and what to bring.
The company also operates Labcorp Drug Screen, which handles pre-employment and workplace drug testing for employers, and Labcorp OnDemand, a direct-to-consumer service where you can order certain tests without a doctor's order and pay out of pocket.
Key Takeaways
- Labcorp operates patient service centers where you provide samples for tests ordered by your doctor, employer, or directly through their consumer service.
- You typically need to bring a photo ID and insurance card to your appointment, though walk-ins are often accepted at many locations.
- Results usually arrive within one to three business days and go to your doctor's office or your online account, depending on who ordered the test.
- Labcorp OnDemand lets you order tests directly without a doctor's order, though you pay the full cost yourself rather than using insurance.
- The company handles routine blood work, drug screening, genetic testing, and wellness panels, but does not diagnose or treat conditions.
How to find a Labcorp location and schedule an appointment
Labcorp operates patient service centers in most U.S. cities and many smaller towns. You can find the nearest location by visiting Labcorp's website and using their location finder, which shows hours, services offered, and whether appointments are required. Many locations accept walk-ins during regular business hours, though scheduling an appointment online or by phone usually reduces wait time.
When you schedule or arrive for an appointment, bring a photo ID and your insurance card if the test is covered by insurance. If your doctor ordered the test, bring the order paperwork or have your doctor's office send it electronically to Labcorp. For employer-ordered tests like drug screens, your employer typically provides instructions on where to go and what to bring.
If you are using Labcorp OnDemand, you order the test through their website, pay the fee upfront, and then visit a patient service center to provide your sample. You choose your location and time slot during the ordering process.
What happens during your visit and how results are delivered
At your appointment, a phlebotomist (the person trained to draw blood) will verify your identity, explain what test is being done, and collect your sample. For blood tests, this means a needle draw from your arm. For other tests, you may provide urine, saliva, or a cheek swab depending on what is being tested. The visit usually takes 5 to 15 minutes.
Your sample is labeled with your information and sent to a Labcorp laboratory for processing. Turnaround time varies by test type — routine blood work typically takes one to three business days, while some specialized tests take longer. Labcorp does not work on weekends or holidays, so timing depends partly on when you provide your sample.
Results are delivered to whoever ordered the test. If your doctor ordered it, results go to your doctor's office and your doctor contacts you with findings. If you ordered through Labcorp OnDemand, results appear in your online account and you can view them directly. For employer-ordered tests, results go to your employer or the third-party administrator handling the screening.
Understanding costs and insurance coverage
If your doctor orders a test and you have health insurance, Labcorp bills your insurance company directly. You pay your copay, coinsurance, or deductible as set by your plan — the amount varies widely depending on your coverage. Labcorp can tell you the estimated cost before your visit if you call ahead with your insurance information.
If you do not have insurance or your plan does not cover a particular test, Labcorp publishes cash prices on their website. These prices are lower than what insurance companies negotiate but higher than what insured patients typically pay out of pocket. Labcorp OnDemand offers set prices for common tests like cholesterol panels, vitamin D levels, and thyroid function — you see the price before ordering.
Employer-ordered tests like drug screens are paid by the employer, not by you. You do not receive a bill for these tests.
Types of tests Labcorp performs
Labcorp processes a wide range of diagnostic tests. Routine blood work includes complete blood counts, metabolic panels, lipid panels, and thyroid tests. The company also performs specialized testing such as genetic screening, cancer marker tests, hormone levels, and infectious disease testing. Drug screening includes pre-employment urine tests, hair tests, and oral fluid tests for workplace compliance.
Labcorp OnDemand focuses on wellness and preventive tests that people commonly order without a doctor — vitamin levels, allergy testing, food sensitivity panels, and STI screening. The company also offers ancestry and genetic health reports through partnerships with genetic testing services.
Labcorp does not perform imaging tests like X-rays or ultrasounds, and it does not do procedures that require a doctor's office or hospital setting. If your doctor orders imaging or a procedure, you will go to a different facility.
What to know about test accuracy and result interpretation
Labcorp is a CLIA-certified laboratory, meaning it meets federal standards for accuracy and quality. The company's tests are performed by trained technicians using validated methods. However, test results are not diagnoses — they are measurements that your doctor interprets in the context of your symptoms, medical history, and other findings.
Some tests require fasting (not eating for a set period before the test) or other preparation to be accurate. Your doctor or the test order will specify any preparation needed. If you do not follow preparation instructions, your results may be inaccurate or the test may need to be repeated.
If you receive results through Labcorp OnDemand and have questions about what they mean, you should discuss them with your doctor. Labcorp provides the measurements but does not interpret results or provide medical information.
Labcorp versus other major laboratory companies
Labcorp and Quest Diagnostics are the two largest clinical laboratory networks in the United States. Both operate thousands of patient service centers, handle similar types of tests, and work with most insurance plans. The main difference for you is location — whichever company has a patient service center closer to your home or work is usually the most convenient choice.
Some doctors' offices or hospitals have contracts with one lab or the other, which means your doctor will send your test to that specific company. You do not usually have a choice in this case. If your doctor does not specify which lab to use, you can ask which one is most convenient for you.
Smaller regional laboratories and hospital-based labs also exist in some areas. These labs may be in-house at your doctor's office or hospital, which can mean faster results. Your doctor will direct you to the appropriate lab based on what test you need and which labs they work with.
Frequently Asked Questions
Do I need a doctor's order to get a test at Labcorp?
Not always. If your doctor orders a test, you need the order. If your employer orders a test, you follow their instructions. But Labcorp OnDemand lets you order certain tests directly without a doctor's order — you pay out of pocket and schedule your own appointment. Not all tests are available through OnDemand; the service focuses on common wellness and screening tests.
How long does it take to get results back?
Most routine blood tests take one to three business days. Some tests take longer — genetic tests may take one to two weeks. Labcorp does not process samples on weekends or holidays, so timing depends partly on when you provide your sample and whether holidays fall in the processing window. Your doctor or the test order will tell you the expected turnaround time.
What if I need to reschedule or cancel my appointment?
You can reschedule or cancel through Labcorp's website or by calling the patient service center directly. Most locations allow cancellations up to a certain time before your appointment. If you cancel and need the test later, you straightforward schedule a new appointment.
Can I see my results online?
If your doctor ordered the test, results go to your doctor's office first, and your doctor decides how to share them with you. Some doctors' offices post results in a patient portal; others call you. If you ordered through Labcorp OnDemand, your results appear in your online account and you can view them directly.
What should I bring to my appointment?
Bring a photo ID and your insurance card. If your doctor sent an order, bring it or have your doctor's office send it electronically. For employer-ordered tests, bring any paperwork your employer gave you. If you are fasting for your test, do not eat or drink anything except water before your appointment.