Quest Diagnostics headquarters details
- Street address
- 500 Plaza Drive
- City
- Secaucus
- State / region
- New Jersey
- ZIP / postal code
- 07094
- Country
- United States
- Phone
- +1 800 222 0446
- Founded
- 1967
- Website
- questdiagnostics.com
- Stock
- NYSE: DGX
Location map
Open in Google MapsAll Quest Diagnostics office locations
| City | State / region | Country | Type |
|---|---|---|---|
| Secaucus HQ | New Jersey | United States | Headquarters |
Showing the headquarters of 19 recorded locations. See every location in GraphIQ →
About Quest Diagnostics
Quest Diagnostics (NYSE: DGX) is headquartered in Secaucus, New Jersey, United States. Founded in 1967, the company has 19 recorded locations and employs approximately 50,000 people worldwide.
Where is Quest Diagnostics's main office?
Quest Diagnostics's main headquarters office is located at 500 Plaza Drive, Secaucus, New Jersey 07094, United States. This is the company's primary corporate address.
Quest Diagnostics regional offices
Beyond its headquarters in Secaucus, Quest Diagnostics has recorded locations in United States.
Quest Diagnostics contact information
The main switchboard for Quest Diagnostics headquarters can be reached at +1 800 222 0446. Official website: questdiagnostics.com.
What does Quest Diagnostics do?
Quest Diagnostics Incorporated provides diagnostic testing, information, and services. The Company operates a national network of full-service laboratories, rapid response laboratories, and patient service centers. Quest Diagnostics offers esoteric, routine medical, drugs of abuse, and non-hospital-based anatomic pathology testing services.
Quest Diagnostics competitors & similar companies
Frequently asked questions
Where is Quest Diagnostics headquarters?
Quest Diagnostics's headquarters is located at 500 Plaza Drive, Secaucus, New Jersey 07094, United States.
How many offices does Quest Diagnostics have?
GraphIQ records 19 locations for Quest Diagnostics, as of October 2026.
What is Quest Diagnostics's corporate address?
The corporate headquarters address is 500 Plaza Drive, Secaucus, New Jersey 07094, United States.
When was Quest Diagnostics founded?
Quest Diagnostics was founded in 1967 and employs approximately 50,000 people.
What is Quest Diagnostics's phone number?
The main phone number for Quest Diagnostics headquarters is +1 800 222 0446.
How many employees does Quest Diagnostics have?
Quest Diagnostics has approximately 50,000 employees (GraphIQ estimate, 2026).
Is Quest Diagnostics a public company?
Yes. Quest Diagnostics is publicly traded on NYSE under the ticker DGX.