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About Quest Diagnostics
Quest Diagnostics is a company reporting $1M-$5M in annual revenue, classified under Medical and Diagnostic Laboratories, based in Houston, Texas, United States and employing 21-50 people.
Its primary NAICS classification is 621511 (Medical Laboratories). Quest Diagnostics is one of 5,697,306 companies listed in Texas.
Business Contact Information
- Address
- 1431 Studemont St, Houston, Texas, 77007, United States
Industry & Classification
NAICS Codes
- 62Health Care and Social Assistance
- 6215Medical and Diagnostic Laboratories
- 621511Medical Laboratories
SIC Codes
- 80Health Services
- 807Medical And Dental Laboratories
- 8071Medical Laboratories
Company Details
- Employees
- 28 (21-50)
- Annual Revenue
- $2.9M ($1M-$5M)
Quest Diagnostics: frequently asked questions
What does Quest Diagnostics do?
Quest Diagnostics is a company reporting $1M-$5M in annual revenue, classified under Medical and Diagnostic Laboratories, based in Houston, Texas, United States and employing 21-50 people.
Where is Quest Diagnostics located?
Quest Diagnostics is headquartered at 1431 Studemont St, Houston, Texas, 77007, United States.
How many employees does Quest Diagnostics have?
Quest Diagnostics has about 28 employees (the 21-50 range).
What is Quest Diagnostics's annual revenue?
Quest Diagnostics's annual revenue is estimated at $2.9M (the $1M-$5M range).
What industry is Quest Diagnostics in?
Quest Diagnostics's primary NAICS code is 621511 (Medical Laboratories).
Largest companies in Texas
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Manufacturing sales in Texas, 2026
In Texas, Factur's 2026 study counted 76 manufacturing quotes worth $23.7M and 13 purchase orders over 12 months: 17% of quotes became orders, against 21% nationally. See the Texas data.
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