Number of Quest Diagnostics clinics in the United States in 2025

Last updated on November 03, 2025
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How many Quest Diagnostics clinics are there in the United States?

There are 6,199 Quest Diagnostics clinics in the United States as of November 03, 2025. The state and territory with the most number of Quest Diagnostics locations in the US is Texas, with 678 clinics, which is about 11% of all Quest Diagnostics clinics in the US.

6,199
Locations
52
States and Territories
2,579
Cities
Map of Quest Diagnostics clinics in the United States


How can I download a list of Quest Diagnostics clinics in the United States into Excel?

You can download the complete list of 6,199 Quest Diagnostics locations data as an Excel file, along with geo-coded addresses, phone numbers and open hours from our data store.

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Top 10 States and Territories with the most Quest Diagnostics clinics

Texas

678 (11%)

A clinic for every 42,767 people, in Texas with about 11% of the total number of Quest Diagnostics clinics


California

649 (10%)

A clinic for every 60,881 people, in California with about 10% of the total number of Quest Diagnostics clinics


Florida

584 (9%)

A clinic for every 36,777 people, in Florida with about 9% of the total number of Quest Diagnostics clinics


State / Territory Number of clinics Population Population per clinic
Texas 678 (11%) 29.00M 42.77K
California 649 (10%) 39.51M 60.88K
Florida 584 (9%) 21.48M 36.78K
New York 387 (6%) 19.45M 50.27K
Ohio 261 (4%) 11.69M 44.78K
Pennsylvania 248 (4%) 12.80M 51.62K
Georgia 232 (4%) 10.62M 45.76K
New Jersey 208 (3%) 8.88M 42.70K
Tennessee 203 (3%) 6.83M 33.64K
Illinois 192 (3%) 12.67M 66.00K

There are Quest Diagnostics clinics in 54 states and territories in the United States

States and Territories without any Quest Diagnostics clinics

These states and territories do not have any Quest Diagnostics clinics

  • American Samoa
  • Guam
  • U.S. Virgin Islands
  • Northern Mariana Islands

There are 4 states and territories without Quest Diagnostics clinics in the United States

Cities with the most number of Quest Diagnostics clinics in the United States

City State / Territory Number of Locations
Houston Texas 68
New York New York 55
Brooklyn New York 45
San Antonio Texas 42
Jacksonville Florida 39
Las Vegas Nevada 28
Austin Texas 28
Oklahoma City Oklahoma 27
Orlando Florida 27
Dallas Texas 27

Download the complete database of Quest Diagnostics Locations in USA

You can download the full list of Quest Diagnostics locations used for this analysis from our data store. Here is a random sample of 10 records for you to look at the fields and the data that we provide.

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Name Street City State / Territory Zip Code Phone Latitude Longitude Address Country Last Updated Date
Adat Inc (Preferred) 2667 Camino Del Rio S Ste 100h San Diego CA 92108 619-295-9284 32.7690892 -117.1353214 2667 Camino Del Rio S Ste 100h, San Diego, CA, 92108 USA 2025-11-03
Flagstaff Industrial Medicine Plc (Preferred) 1515 E Cedar Ave Ste A-3 Flagstaff AZ 86004 928-774-2788 35.217496 -111.620958 1515 E Cedar Ave Ste A-3, Flagstaff, AZ, 86004 USA 2025-11-03
Arcpoint Labs Of San Rafael (Preferred) 4340 Redwood Hwy Ste A33 San Rafel CA 94903 415-475-4620 37.9953116 -122.5290863 4340 Redwood Hwy Ste A33, San Rafel, CA, 94903 USA 2025-11-03
Carbon Health - Alameda Landing (Preferred) 2690 Fifth St Ste B Alameda CA 94501 510-808-4922 37.7874915 -122.2812059 2690 Fifth St Ste B, Alameda, CA, 94501 USA 2025-11-03
Afc Urgent Care - Trumbull (Preferred) 57 Monroe Tpke Trumbull CT 06611 203-590-6330 41.2912208 -73.2348674 57 Monroe Tpke, Trumbull, CT, 06611 USA 2025-11-03
Afc Urgent Care - Bridgeport (Preferred) 161 Boston Ave Bridgeport CT 06610 203-333-4400 41.2025634 -73.1861261 161 Boston Ave, Bridgeport, CT, 06610 USA 2025-11-03
MD Now F - Lejeune (Preferred) 150 Nw 42nd Ave Miami FL 33126 786-753-3751 25.7729732 -80.2640059 150 Nw 42nd Ave, Miami, FL, 33126 USA 2025-11-03
Osf Escanaba Lab (Preferred) 3401 Ludington St Escanaba MI 49829 906-786-5707 45.7426626 -87.0963393 3401 Ludington St, Escanaba, MI, 49829 USA 2025-11-03
Direct Rehabmed (Preferred) 3110 Park Center Dr Tyler TX 75701 903-593-9999 32.3151224 -95.3383973 3110 Park Center Dr, Tyler, TX, 75701 USA 2025-11-03
Quest Diagnostics - Northborough Southwest Cut Off - Employer Drug Testing Not Offered 333 Sw Cutoff Northborough MA 01532 508-842-0230 42.285347 -71.667622 333 Sw Cutoff, Northborough, MA, 01532 USA 2025-11-03

* Open hours are not displayed here as it is too big to show on a reasonably sized screen.

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