Number of Quest Diagnostics clinics in the United States in 2025
How many Quest Diagnostics clinics are there in the United States?
There are 5,876 Quest Diagnostics clinics in the United States as of September 26, 2025. The state and territory with the most number of Quest Diagnostics locations in the US is Texas, with 637 clinics, which is about 11% of all Quest Diagnostics clinics in the US.
How can I download a list of Quest Diagnostics clinics in the United States into Excel?
You can download the complete list of 5,876 Quest Diagnostics locations data as an Excel file, along with geo-coded addresses, phone numbers and open hours from our data store.
Download DatasetTop 10 States and Territories with the most Quest Diagnostics clinics
Texas
637 (11%)
A clinic for every 45,520 people, in Texas with about 11% of the total number of Quest Diagnostics clinics
California
631 (11%)
A clinic for every 62,618 people, in California with about 11% of the total number of Quest Diagnostics clinics
Florida
583 (10%)
A clinic for every 36,840 people, in Florida with about 10% of the total number of Quest Diagnostics clinics
| State / Territory | Number of clinics | Population | Population per clinic |
|---|---|---|---|
| Texas | 637 (11%) | 29.00M | 45.52K |
| California | 631 (11%) | 39.51M | 62.62K |
| Florida | 583 (10%) | 21.48M | 36.84K |
| New York | 377 (6%) | 19.45M | 51.60K |
| Ohio | 255 (4%) | 11.69M | 45.84K |
| Pennsylvania | 233 (4%) | 12.80M | 54.94K |
| Georgia | 210 (4%) | 10.62M | 50.56K |
| New Jersey | 204 (3%) | 8.88M | 43.54K |
| Tennessee | 190 (3%) | 6.83M | 35.94K |
| Illinois | 180 (3%) | 12.67M | 70.40K |
There are Quest Diagnostics clinics in 56 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
- U.S. Virgin Islands
- Northern Mariana Islands
There are 3 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 | 53 |
| San Antonio | Texas | 42 |
| Brooklyn | New York | 40 |
| Jacksonville | Florida | 38 |
| Oklahoma City | Oklahoma | 28 |
| Austin | Texas | 28 |
| Orlando | Florida | 28 |
| Las Vegas | Nevada | 28 |
| 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.
| Name | Street | City | State / Territory | Zip Code | Phone | Latitude | Longitude | Address | Country | Last Updated Date |
|---|---|---|---|---|---|---|---|---|---|---|
| Diagnostic Laboratory Of Oklahoma - Muskogee Psc | 3316 W Okmulgee St | Muskogee | OK | 74401 | 918-682-4112 | 35.7551713 | -95.4040023 | 3316 W Okmulgee St, Muskogee, OK, 74401 | USA | 2025-09-26 |
| Tomo Drug Testing - Tulsa (Preferred) | 5640 S Memorial | Tulsa | OK | 74145 | 918-622-5669 | 36.083641 | -95.886391 | 5640 S Memorial, Tulsa, OK, 74145 | USA | 2025-09-26 |
| Xpress Wellness Uc - Muskogee South (Preferred) | 2525 Chandler Rd | Muskogee | OK | 74403 | 918-681-7533 | 35.7401366 | -95.3371306 | 2525 Chandler Rd, Muskogee, OK, 74403 | USA | 2025-09-26 |
| Quest Diagnostics - Portland Northwest Westover | 2351 Nw Westover Rd Suite R250 | Portland | OR | 97210 | 503-222-6188 | 45.52474 | -122.7002145 | 2351 Nw Westover Rd Suite R250, Portland, OR, 97210 | USA | 2025-09-26 |
| Smart Labs Now - Smart Labs Now (Preferred) | 12003 Ne Ainsworth Cir Ste 103 | Portland | OR | 97220 | 503-477-7748 | 45.565815 | -122.539502 | 12003 Ne Ainsworth Cir Ste 103, Portland, OR, 97220 | USA | 2025-09-26 |
| Toxiscreen Llc (Preferred) | 405 N 1 St St Ste 111 | Hermiston | OR | 97838 | 541-667-8378 | 45.8433286 | -119.2907325 | 405 N 1 St St Ste 111, Hermiston, OR, 97838 | USA | 2025-09-26 |
| Spectrum Health & Wellness, Pllc (Preferred) | 400 Nw Eastman Pkwy | Gresham | OR | 97030 | 360-347-6322 | 45.5006721 | -122.4338933 | 400 Nw Eastman Pkwy, Gresham, OR, 97030 | USA | 2025-09-26 |
| Afc Urgent Care - Ridge Ave (Preferred) | 5708 Ridge Ave | Philadelphia | PA | 19128 | 267-440-7779 | 40.0270509 | -75.2098701 | 5708 Ridge Ave, Philadelphia, PA, 19128 | USA | 2025-09-26 |
| Quest Diagnostics - New Castle | 2004 W State St Westgate Plaza Upmc Building | New Castle | PA | 16101 | 724-658-7711 | 41.0081117 | -80.3775086 | 2004 W State St Westgate Plaza Upmc Building, New Castle, PA, 16101 | USA | 2025-09-26 |
| Diagnostic Laboratory Of Oklahoma - Mcalester | 1500 N Strong Blvd | Mcalester | OK | 74501 | 918-302-3842 | 34.9421776 | -95.7465326 | 1500 N Strong Blvd, Mcalester, OK, 74501 | USA | 2025-09-26 |
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