How Long Does It Take to Receive Laboratory Results?
Written by YiQiu Hu, NMD
Arizona-licensed naturopathic physician and virtual concierge medicine provider
Published August 2026 | Medically reviewed August 2026
If you recently had blood work or another laboratory test performed, one of the first questions you may have is: When will my results be ready?
For many routine laboratory tests, results are available within approximately one to several business days. Some common tests may be reported within 24–48 hours, while other laboratories advise that many routine results may take several days. More complex or specialized testing can take one to three weeks—or occasionally longer—depending on the test and laboratory performing it.
The important thing to understand is that there is no single turnaround time that applies to every laboratory test.
The type of test, where it is performed, how the specimen is processed, and whether additional testing is required can all affect when your results become available.
If you are new to laboratory testing, you may also want to read our Patient's Guide to Understanding Blood Work and Laboratory Testing.
How Long Do Routine Blood Test Results Usually Take?
Many commonly ordered blood tests are processed relatively quickly.
Examples include:
Complete blood count (CBC)
Comprehensive metabolic panel (CMP)
Basic metabolic panel (BMP)
Cholesterol and lipid testing
Blood glucose
Hemoglobin A1C
Many thyroid tests
Many routine vitamin and nutrient tests
Depending on the laboratory, many standard tests may be available within approximately one to three business days, although the actual turnaround time can be shorter or longer.
Labcorp states that many standard laboratory results are available within 24–48 hours, while Quest Diagnostics notes that many results are available within a few days.
These are general estimates rather than guarantees.
Your physician or the laboratory performing your testing may be able to give you a more specific estimate for the particular tests that were ordered.
Why Do Some Laboratory Tests Take Longer?
Not every laboratory test can be performed immediately after your blood or other specimen is collected.
Several factors can affect turnaround time.
The Type of Test Being Performed
Routine tests performed frequently by a laboratory can often be processed quickly.
More specialized tests may require different equipment, specialized laboratory personnel, additional processing, or shipment to another facility.
That is one reason specialty laboratory testing may take longer than routine blood work.
Your Specimen May Need to Be Sent to Another Laboratory
The location where your blood is drawn is not necessarily the location where the test is performed.
Some specimens are transported to regional or specialized laboratories for analysis.
Shipping and processing time may therefore add to the overall turnaround time.
Some Tests Require Additional Processing
Certain tests involve several laboratory steps before a final result can be released.
A laboratory may also perform additional testing automatically when an initial result meets predetermined criteria. This is sometimes referred to as reflex testing.
Confirmatory testing can also increase the amount of time required before a final result is available.
Cultures Need Time to Grow
Tests involving bacterial cultures are different from many standard blood tests because the laboratory may need to allow microorganisms time to grow before they can be identified.
According to MedlinePlus, bacterial cultures commonly require time for enough bacteria to grow for testing, which is why final culture results may take several days.
Specialized and Genetic Testing May Take Longer
Some specialized laboratory tests may require days or weeks to complete.
Labcorp notes that certain complex, genetic, or esoteric tests can take substantially longer than standard laboratory testing, while Quest similarly notes that complex testing may take 14 days or more.
If you are having specialized testing performed, ask about the expected turnaround time before or at the time your specimen is collected.
Why Are Some of My Results Available While Others Are Still Pending?
This is very common.
When several tests are ordered at the same time, they do not necessarily finish at the same time.
For example, your CBC may be completed before another test that requires specialized analysis.
Your laboratory portal might therefore show:
Several completed results
One or more tests marked as pending
Results appearing at different times over several days
This usually does not mean something is wrong.
It generally means that different components of your laboratory order have different processing times.
Laboratories such as Quest indicate that results may appear in the patient portal as individual tests are completed.
Does a Longer Wait Mean My Result Is Abnormal?
No.
How long a laboratory test takes does not generally tell you whether the result will be normal or abnormal.
A test may take longer because of its processing requirements, transportation to another laboratory, testing schedule, need for confirmation, or the complexity of the analysis.
Similarly, receiving a result quickly does not necessarily mean everything is normal.
Once results become available, they should be interpreted in the context of your medical history, symptoms, medications, previous laboratory findings, and the reason the testing was ordered.
You can learn more about why blood work is used in our article Why Do I Need Blood Work?.
Can Laboratory Results Be Available the Same Day?
Yes. Some tests can be completed the same day, especially when they are routinely performed by the laboratory processing the specimen.
However, patients should not assume that every routine test will be completed that quickly.
Transportation, collection time, laboratory workload, weekends, holidays, equipment, and the specific testing method can all influence turnaround time.
If the timing of your laboratory results affects an upcoming appointment or medical decision, ask your physician or laboratory what turnaround time you should expect.
Why Haven't I Received My Laboratory Results Yet?
There are several possible reasons.
Your test may simply still be processing.
Other possibilities include:
The specimen was sent to another laboratory
Several ordered tests have different turnaround times
Additional testing was required
The laboratory needs to repeat part of the analysis
A specimen was inadequate and recollection may be necessary
Results were sent to your healthcare provider but have not yet been discussed with you
There is an issue with the patient portal or contact information
Labcorp advises that delays in receiving results can sometimes be related to patient information or portal information as well as testing time.
If a result is taking substantially longer than the timeframe you were originally given, it is reasonable to contact the laboratory or ordering healthcare provider.
When Should I Follow Up About Missing Results?
If the laboratory gave you an estimated turnaround time and that period has passed, check your patient portal first if one is available.
If the result is still not available, you can contact the laboratory or your healthcare provider and ask:
Is the test still pending?
Was the specimen received successfully?
Is additional testing being performed?
Does the specimen need to be recollected?
Have the results already been sent to my physician?
When should I expect the final report?
Quest, for example, advises patients to check the pending-results area of its portal and provides additional options for requesting results when testing has been outstanding beyond the expected period.
If you are experiencing significant or worsening symptoms, however, you should not delay appropriate medical evaluation simply because you are waiting for a laboratory result.
Should I Review My Laboratory Results on My Own?
Patient portals make it easier than ever to see laboratory results as soon as they become available.
That access can be helpful, but seeing a number on a screen is different from understanding what that number means.
Laboratory reference ranges are useful, but an isolated value may not provide the complete picture.
Medications, hydration, recent illness, diet, exercise, timing, laboratory methodology, and normal biological variation can sometimes affect results. Healthcare providers may also need to consider symptoms, medical history, previous results, and other testing when determining the significance of a finding.
A mildly abnormal result does not automatically mean that you have a medical condition, just as a result within the reference range does not necessarily answer every clinical question.
Our Patient's Guide to Understanding Blood Work and Laboratory Testing explains this in more detail.
What Happens After Your Results Are Available?
Receiving the laboratory report is only one part of the testing process.
The next step is determining what the findings mean for you.
Depending on the results, your physician may recommend:
No further testing
Monitoring a result over time
Repeating a test
Comparing the results with previous laboratory values
Lifestyle or nutrition changes
Medication adjustments
Additional laboratory testing
Imaging
Referral to another healthcare professional
Further medical evaluation
Laboratory testing is most useful when the results answer a meaningful clinical question and help guide an appropriate next step.
If you are interested in learning more about the overall testing process, explore the Routine Laboratory Testing Resource Center.
Frequently Asked Questions
Can blood test results come back in 24 hours?
Yes. Some routine blood tests may be completed within 24 hours, although turnaround time varies by laboratory and test. Other routine tests may take several business days.
Why did one laboratory result come back before the others?
Different tests require different processing methods and amounts of time. When multiple tests are ordered, results may therefore appear individually rather than all at once.
How long do specialty laboratory results take?
Specialty testing commonly takes longer than routine laboratory testing. Depending on the test, results may take several days to several weeks. Ask the performing laboratory for the expected turnaround time for your specific test.
Does an abnormal test result come back faster?
Not necessarily. Turnaround time primarily depends on the test and laboratory process rather than whether your eventual result falls inside or outside a reference range.
What should I do if my laboratory results are taking too long?
Check your patient portal and contact the laboratory or ordering healthcare provider if the expected turnaround time has passed. They can determine whether the test remains in progress, has already been reported, or requires additional processing.
The Bottom Line
Many routine laboratory results are available within one to several business days, while specialized testing may take days to several weeks.
The exact timing depends on what was ordered, where the test is performed, how the specimen must be processed, and whether additional or confirmatory testing is required.
It is also normal for different results from the same blood draw to become available at different times.
Rather than focusing only on how quickly a result appears, the most important step is making sure the completed results are reviewed appropriately and interpreted within the context of your overall health.
If you have laboratory results you would like reviewed or want to discuss which testing may be appropriate for your health concerns, contact Ask Dr. Hu to request an appointment.
Medical Accuracy, Editorial Standards, and Transparency
This FAQ was written and medically reviewed by YiQiu Hu, NMD, an Arizona-licensed naturopathic physician whose clinical work includes preventive healthcare, health optimization, laboratory evaluation and interpretation, and individualized medical care.
This article was developed using clinical experience and current patient-education information from established laboratory and medical resources, including:
Turnaround times discussed on this page are general examples rather than guarantees. Processing times vary according to the individual test, laboratory, specimen, location, testing methodology, and other circumstances.
Transparency statement: Ask Dr. Hu provides laboratory ordering, laboratory review, and individualized medical evaluation as part of patient care. Laboratory specimens may be processed by independent third-party laboratories, and Ask Dr. Hu cannot guarantee the processing or reporting time of an outside laboratory.
Author: YiQiu Hu, NMD
Medical Review: YiQiu Hu, NMD
Last Reviewed: August 2026
Clinical Focus: Preventive healthcare, health optimization, laboratory evaluation, laboratory interpretation, and individualized medical care
About the Author
YiQiu Hu, NMD
Dr. YiQiu Hu is an Arizona-licensed naturopathic physician, founder of Ask Dr. Hu, and medical director. His clinical work focuses on concierge medicine, preventive healthcare, health optimization, laboratory evaluation, chronic disease management, medical weight management, hormone care, and individualized treatment planning.
Dr. Hu created Ask Dr. Hu to provide patients with a more accessible and relationship-centered healthcare experience built around thoughtful medical evaluation, longer conversations, direct communication, continuity of care, and practical medical guidance.
He earned his Doctor of Naturopathic Medicine degree from Sonoran University of Health Sciences and a Bachelor of Science in Biomedical Sciences from Northern Arizona University. In addition to patient care, Dr. Hu has experience in medical leadership and multidisciplinary healthcare practice management.
Learn more about Dr. YiQiu Hu and the physicians at Ask Dr. Hu.
Information on this page is provided for general educational purposes and does not replace individualized medical advice, diagnosis, or treatment.