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Quest Diagnostics

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Lab testing, laboratory and office locations around the world

Quest Diagnostics has headquarters in the U.S. and operations in India, Ireland, and Mexico. Our products and services are used by customers in over 130 countries. We also collaborate with many international diagnostic laboratories, hospitals and clinics to help improve human health around the world.

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US Facilities & Operations International Facilities & Operations

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Quest Diagnostics - Largo

1301 2Nd Ave Sw,

Ste 101

Largo, FL 33770

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3.04 mi away

Schedule Appointment 727-209-4319
Monday: 6:30 am-3:30 pm
Tuesday: 6:30 am-3:30 pm
Wednesday: 6:30 am-3:30 pm
Thursday: 6:30 am-3:30 pm
Friday: 6:30 am-3:30 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Seminole

11232 Park Blvd,

Seminole, FL 33772

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4.05 mi away

Schedule Appointment 727-392-4394
Monday: 6:00 am-3:00 pm
Tuesday: 6:00 am-3:00 pm
Wednesday: 6:00 am-3:00 pm
Thursday: 6:30 am-3:30 pm
Friday: 6:30 am-3:30 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Clearwater

1219 Cleveland St,

Clearwater, FL 33755

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6.37 mi away

Schedule Appointment 727-461-3449
Monday: 5:30 am-2:30 pm
Tuesday: 5:30 am-2:30 pm
Wednesday: 5:30 am-2:30 pm
Thursday: 5:30 am-2:30 pm
Friday: 5:30 am-2:30 pm
Saturday: 7:00 am-12:00 pm
Sunday: Closed
Quest Diagnostics - St Petersburg Northside - Employer Drug Testing Not Offered

6006 49th St N,

Suite 300

St Petersburg, FL 33709

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8.69 mi away

Schedule Appointment 727-527-1630
Monday: 7:00 am-3:30 pm
Tuesday: 7:00 am-3:30 pm
Wednesday: 7:00 am-3:30 pm
Thursday: 7:00 am-3:30 pm
Friday: 7:00 am-3:30 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Dunedin

1831 N Belcher Rd,

Ste D1

Clearwater, FL 33765

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8.81 mi away

Schedule Appointment 727-725-4017
Monday: 6:00 am-3:30 pm
Tuesday: 6:00 am-3:30 pm
Wednesday: 6:00 am-3:30 pm
Thursday: 6:00 am-3:30 pm
Friday: 6:00 am-3:30 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - South Pasadena

6800 Gulfport Blvd S,

Ste 115

South Pasadena, FL 33707

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10.66 mi away

Schedule Appointment 727-384-3663
Monday: 6:30 am-3:30 pm
Tuesday: 6:30 am-3:30 pm
Wednesday: 6:30 am-3:30 pm
Thursday: 6:30 am-3:30 pm
Friday: 6:30 am-3:30 pm
Saturday: 6:00 am-11:00 am
Sunday: Closed
Quest Diagnostics - St Pete Gateway

1173 62nd Avenue North,

St Petersburg, FL 33702

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11.02 mi away

Schedule Appointment 727-525-4790
Monday: 6:00 am-3:00 pm
Tuesday: 6:00 am-3:00 pm
Wednesday: 6:00 am-3:00 pm
Thursday: 6:00 am-3:00 pm
Friday: 6:00 am-3:00 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - St Petersburg

1101 34Th St N,

St Petersburg, FL 33713

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11.28 mi away

Schedule Appointment 727-321-0595
Monday: 6:30 am-3:30 pm
Tuesday: 6:30 am-3:30 pm
Wednesday: 6:30 am-3:30 pm
Thursday: 6:30 am-3:30 pm
Friday: 6:30 am-3:30 pm
Saturday: 6:00 am-11:00 am
Sunday: Closed
Quest Diagnostics - Clearwater Countryside

3220 N Mcmullen Booth Rd,

Ste B

Clearwater, FL 33761

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12.84 mi away

Schedule Appointment 727-249-8802
Monday: 6:00 am-3:00 pm
Tuesday: 6:00 am-3:00 pm
Wednesday: 6:00 am-3:00 pm
Thursday: 6:00 am-3:00 pm
Friday: 6:00 am-3:00 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Palm Harbor

31846 Us Highway 19 N,

Palm Harbor, FL 34684

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13.72 mi away

Schedule Appointment 727-786-7954
Monday: 5:30 am-2:30 pm
Tuesday: 5:30 am-2:30 pm
Wednesday: 5:30 am-2:30 pm
Thursday: 5:30 am-2:30 pm
Friday: 5:30 am-2:30 pm
Saturday: 7:00 am-12:00 pm
Sunday: Closed
Quest Diagnostics - Inside Tampa Road Walmart Store

3801 Tampa Rd,

Oldsmar, FL 34677

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14.22 mi away

Schedule Appointment 813-547-4058
Monday: 6:30 am-3:30 pm
Tuesday: 6:30 am-3:30 pm
Wednesday: 6:30 am-3:30 pm
Thursday: 6:30 am-3:30 pm
Friday: 6:30 am-3:30 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Tampa Sheldon Road

11611 Sheldon Rd,

Tampa, FL 33626

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18.17 mi away

Schedule Appointment 813-926-7930
Monday: 6:30 am-3:30 pm
Tuesday: 6:30 am-3:30 pm
Wednesday: 6:30 am-3:30 pm
Thursday: 6:30 am-3:30 pm
Friday: 6:30 am-3:30 pm
Saturday: 6:30 am-11:30 am
Sunday: Closed
Quest Diagnostics - Tarpon Springs

707-1073 South Pinellas Ave,

Unit 749

Tarpon Springs, FL 34689

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18.23 mi away

Schedule Appointment 727-267-6035
Monday: 5:30 am-2:30 pm
Tuesday: 5:30 am-2:30 pm
Wednesday: 5:30 am-2:30 pm
Thursday: 5:30 am-2:30 pm
Friday: 5:30 am-2:30 pm
Saturday: 7:00 am-12:00 pm
Sunday: Closed
Quest Diagnostics - Tampa South

110 S Macdill Ave,

Suite 202

Tampa, FL 33609

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19.09 mi away

Schedule Appointment 813-499-0431
Monday: 6:00 am-3:00 pm
Tuesday: 6:00 am-3:00 pm
Wednesday: 6:00 am-3:00 pm
Thursday: 6:00 am-3:00 pm
Friday: 6:00 am-3:00 pm
Saturday: 7:00 am-11:00 am
Sunday: Closed
Quest Diagnostics - Tampa MLK

3440 W Dr Martin Luther King Jr Blvd,

Ste 201

Tampa, FL 33607

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19.43 mi away

Schedule Appointment 813-348-1499
Monday: 6:00 am-3:00 pm
Tuesday: 6:00 am-3:00 pm
Wednesday: 6:00 am-3:00 pm
Thursday: 6:00 am-3:00 pm
Friday: 6:00 am-3:00 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Tampa Dale Mabry

14831 N Dale Mabry Hwy,

Tampa, FL 33618

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22.63 mi away

Schedule Appointment 813-961-0745
Monday: 6:30 am-3:30 pm
Tuesday: 6:30 am-3:30 pm
Wednesday: 6:30 am-3:30 pm
Thursday: 6:30 am-3:30 pm
Friday: 6:30 am-3:30 pm
Saturday: 7:00 am-11:00 am
Sunday: Closed
Quest Diagnostics - Trinity

10710 Sr 54,

Suite 109

Trinity, FL 34655

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23.9 mi away

Schedule Appointment 727-372-7982
Monday: 6:00 am-3:00 pm
Tuesday: 6:00 am-3:00 pm
Wednesday: 6:00 am-3:00 pm
Thursday: 6:00 am-3:00 pm
Friday: 6:00 am-3:00 pm
Saturday: 6:30 am-11:30 am
Sunday: Closed
Quest Diagnostics - New Port Richey

4741 US Highway 19,

New Port Richey, FL 34652

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24.45 mi away

Schedule Appointment 727-847-6475
Monday: 5:30 am-3:00 pm
Tuesday: 5:30 am-3:00 pm
Wednesday: 5:30 am-3:00 pm
Thursday: 5:30 am-3:00 pm
Friday: 5:30 am-3:00 pm
Saturday: 5:30 am-11:00 am
Sunday: Closed

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Quest® is the brand name used for services offered by Quest Diagnostics Incorporated and its affiliated companies. Quest Diagnostics Incorporated and certain affiliates are CLIA-certified laboratories that provide HIPAA-covered services.  Other affiliates operated under the Quest® brand, such as Quest Consumer Inc., do not provide HIPAA-covered services. 

 

Quest®, Quest Diagnostics®, any associated logos, and all associated Quest Diagnostics registered or unregistered trademarks are the property of Quest Diagnostics. All third-party marks—® and ™—are the property of their respective owners. © 2025 Quest Diagnostics Incorporated. All rights reserved. Image content features models and is intended for illustrative purposes only.