Drug Testing in Knoxville, TN
Certified drug, alcohol, and DNA testing for Knoxville and Knox County, with collection options positioned for a metro that stretches from downtown through West Knoxville and into the surrounding East Tennessee corridor. Order online and take your lab pass to a participating Quest Diagnostics or Labcorp collection clinic.
How to get a drug test in Knoxville
Choose the test online and pay securely. You receive a lab pass by email within minutes. Take that pass to a participating Quest Diagnostics or Labcorp collection clinic in the Knoxville area. Most negative results reach your secure account within 24 to 48 hours.
Knoxville area coverage: Coverage includes Downtown Knoxville, Old North Knoxville, Bearden, West Hills, Cedar Bluff, Fountain City, South Knoxville, East Knoxville and the wider Knox County market, with nearby collection options serving commuters from Oak Ridge, Maryville, Sevierville and other East Tennessee communities.
Knoxville Neighborhoods and ZIP Codes We Serve
Coverage includes Downtown Knoxville, Old North Knoxville, Bearden, West Hills, Cedar Bluff, Fountain City, South Knoxville, East Knoxville and the wider Knox County market, with nearby collection options serving commuters from Oak Ridge, Maryville, Sevierville and other East Tennessee communities. Use the finder below to confirm the closest participating collection clinic before you order.
Knoxville Market
Downtown and Old City 37902, 37915, 37917
- Downtown Knoxville
- Old City
- Fourth and Gill
- North Hills
- Mechanicsville
West Knoxville 37919, 37922, 37923, 37931
- Bearden
- West Hills
- Cedar Bluff
- Karns
- Farragut area
North Knoxville 37912, 37918, 37938
- Fountain City
- Broad Acres
- Halls
- Powell
- North Hills
East Knoxville 37914, 37924, 37920
- East Knoxville
- Burlington
- Chilhowee Park
- Holston Hills
- Boyds Creek
South Knoxville 37915, 37916, 37920
- South Knoxville
- Island Home
- Vestals
- Chapman Highway
- Colonial Village
Knoxville Regional Market 37830, 37716, 37849
- Oak Ridge
- Clinton
- Lenoir City
- Maryville
- Sevierville
Coverage is based on the broader Knoxville market. Use the collection clinic finder for the current participating locations and hours.
Find a Collection Clinic Near Knoxville
Enter your ZIP code to see participating Quest Diagnostics and Labcorp collection clinics serving Knoxville and Knox County, along with current addresses and hours. Choose the clinic during checkout after confirming the test provider.
Quest Diagnostics tests must be completed at a Quest clinic, and Labcorp tests at a Labcorp clinic. Use the provider filter above to match the test you intend to order.
Tests Available in Knoxville
Every test is processed through a certified laboratory partner. Applicable tests include Medical Review Officer review and chain of custody documentation.
Urine Drug Tests
The most widely accepted panel type, including 5 panel, 10 panel, and 12 panel options with expanded opiates and alcohol add-ons.
Hair Drug Tests
A longer detection window than urine, typically covering up to about 90 days. Panels available from 5 to 17 substances.
DNA and Paternity Testing
Home test kits for personal answers, and legally admissible testing with chain of custody for court matters.
Nail Drug Tests
Fingernail or toenail testing, useful when hair is unavailable or when a longer look back period is needed.
Oral Fluid Tests
A directly observed saliva collection, often used for reasonable suspicion and post-incident testing.
Alcohol Testing
Breath alcohol testing for current impairment, plus urine and hair EtG testing for a longer detection window.
Popular in Knoxville
Drug Testing Across Knoxville and the East Tennessee Corridor
University and research workforce
The Knoxville area includes the University of Tennessee and a broader research and technology corridor connected to Oak Ridge. Employers in these environments may have different requirements for pre-employment screening, regulated roles and workplace safety programs. A clearly defined order helps the employee complete the correct test without having to interpret the employer's policy at the collection clinic.
Manufacturing and technical trades
East Tennessee has a substantial manufacturing and skilled-trades workforce. Employees may commute from outside Knoxville, which makes a convenient collection clinic more important than a simple city-center address. The finder lets a donor search by ZIP code before choosing the collection location.
Court and professional testing
Knox County residents may need testing for court, probation, employment or family matters. The testing method and documentation should match the authority requesting the result. Legal DNA testing and court-ordered drug testing should be ordered as formal services rather than treated as ordinary personal testing.
What matters when choosing a test
- Match the specimen type to the employer, court or program requirement
- Use the correct DOT or non-DOT service when a regulated test is required
- Choose legal DNA collection when the result must support an official proceeding
- Check the collection clinic finder before ordering if travel time matters
- Keep the order and result documentation for your records
Need help choosing a test?
Talk to Our TeamTesting for Knoxville Employers and Individuals
Healthcare
Knoxville is a regional healthcare center with hospitals, medical practices and support organizations. Employer programs can include pre-employment screening and other workplace testing requirements.
Education and Research
The University of Tennessee and the East Tennessee research corridor create demand for professional and technical workers. Testing requirements vary by employer and role.
Manufacturing and Skilled Trades
Manufacturing, construction and technical trades create safety-sensitive positions where consistent workplace testing programs may be required by employer policy.
Transportation and Distribution
I-40 and I-75 make Knoxville a major regional transportation corridor. Commercial drivers and logistics employees may fall under DOT or employer-directed testing requirements.
How Far Back Each Test Looks
Detection windows are approximate. Actual results depend on the substance, how often it was used, dose, and individual metabolism.
| Test Type | Typical Detection Window | Commonly Used For |
|---|---|---|
| Oral fluid (saliva) | About 24 to 48 hours | Reasonable suspicion, post-incident |
| Urine | Roughly 1 to 4 days for most substances, longer with frequent cannabis use | Pre-employment, DOT, random |
| Breath alcohol | Current impairment only | DOT alcohol testing, post-accident |
| Urine EtG (alcohol) | Up to about 80 hours | Court ordered abstinence monitoring |
| Hair | Up to about 90 days | Pre-employment, custody matters |
| Nail | Up to about 3 to 6 months | Extended history, hair unavailable |
Four Steps From Order to Result
No insurance required, no doctor referral, and no appointment at most Knoxville collection clinics.
Choose your test
Select the panel and specimen type that matches your requirement.
Order online
Pay securely and receive your lab pass by email within minutes.
Visit a collection clinic
Walk in to a participating Knoxville area location during business hours.
Get your results
Results arrive in your secure account, typically in 24 to 48 hours.
How Knoxville's Geography Changes Testing
ReliaLab Test provides online ordering with collection through participating Quest Diagnostics and Labcorp collection clinics. That model is useful in Knoxville because testing is often tied to work schedules, court deadlines or employer onboarding rather than a routine medical visit. The right collection clinic depends on where the donor lives or works, so the ZIP based finder should be used before the order when location is important.
West Knoxville is not downtown Knoxville
The metro is spread across a large area, and traffic can make a clinic that looks close on a map inconvenient during a workday. Searching by ZIP code before ordering is a practical way to reduce unnecessary travel.
East Tennessee commuting is regional
Workers can live in Knoxville and work in Oak Ridge, Maryville, Clinton or another nearby community. For employers with a distributed workforce, the collection clinic is best chosen around where the employee actually works or lives.
Research and regulated work require precision
Some employers have formal testing protocols that specify specimen type, panel and documentation. The order should reflect that requirement before the donor arrives, especially when the result is tied to a regulated or safety-sensitive position.
Results are handled through the secure account associated with the order. When a result requires confirmation or Medical Review Officer review, the additional process is part of producing a defensible result rather than something the donor has to arrange independently.
Knoxville at a Glance
- Knox County collection clinic coverage
- West, North, East and South Knoxville options
- Regional access toward Oak Ridge and Maryville
- DOT and non-DOT testing options
- Legal drug, alcohol and DNA testing
Need help choosing a test?
Connect With an ExpertOther Tennessee Locations
Knoxville Testing Questions
You can order online and visit a participating Quest Diagnostics or Labcorp collection clinic serving Knoxville and Knox County. Coverage includes Downtown, West Knoxville, Bearden, Cedar Bluff, Fountain City, South Knoxville and East Knoxville.
Yes. DOT drug testing is available through participating collection clinics. The DOT test is a regulated service and should be ordered according to the employer's or carrier's federal testing requirement.
Testing is available across the Knoxville market, including locations convenient to central Knoxville and the university area. Use the ZIP based finder to identify the participating collection clinic that best fits your location.
Yes. Personal DNA testing and legal DNA testing are different services. A legal paternity test includes identity verification and chain of custody for matters that require documented evidence.
A home kit is designed for personal testing. If a court requires admissible evidence, use a legal DNA collection with identity verification and chain of custody.
Hair drug testing is available through participating collection clinics. Hair testing typically looks back up to about 90 days, but actual detection depends on the substance and individual circumstances.
Usually not for standard drug and alcohol collections. Most participating collection clinics accept walk-ins during their business hours after you receive the lab pass. Specialized services may require an appointment.
Follow the instruction from the court, probation officer or attorney. Knox County Criminal Court is part of the Knox County court system, and the authority requesting the test determines what specimen, panel and schedule are required.
Cost depends on specimen type and panel size. Review the online catalog to choose the service that matches the employer, court or personal requirement.
Many negative results are typically returned in about 24 to 48 hours. Confirmation testing or Medical Review Officer review can add time, and hair or nail testing can take longer.
Order Your Knoxville Test Today
Certified laboratories, participating collection clinics across Knox County, and online ordering that keeps the process straightforward.
No insurance needed. No doctor referral required.
