Quest Diagnostics reviews

3.2

52% would recommend to a friend

(5,665 total reviews)

Jim Davis

58% approve of CEO

49% positive business outlook

Quest Diagnostics has an employee rating of 3.2 out of 5 stars, based on 5,665 company reviews on Glassdoor which indicates that most employees have a good working experience there. The Quest Diagnostics employee rating is in line with the average (within 1 standard deviation) for employers within the Salud industry (3.4 stars).

Reviews by job title

6K reviews
4.0
Dec 10, 2025
Recommend
CEO approval
Business Outlook

Pros

I gained real hands-on experience working with high-volume clinical data and learned how to identify, correct, and validate information flowing through laboratory systems. The role strengthened my technical accuracy, attention to detail, and understanding of how data governance supports clinical, billing, and compliance workflows. The environment was structured, expectations were clear, and the work helped build a solid foundation for data analytics and data management roles.

Cons

The work can be repetitive and heavily task-driven with limited opportunities for expanded responsibilities. Workflow volume fluctuates, which sometimes creates pressure to move quickly while still maintaining accuracy. Upward mobility on the data operations side is achievable but can be slow without active cross-training or mentorship.

3.0
Dec 9, 2025

Unorganized

Recommend
CEO approval
Business Outlook

Pros

Big company benefits like health insurance and free testing

Cons

Unorganized, mismanaged, still uses paper for tracking

1.0
Dec 4, 2025

horrible

Anonymous employee
Recommend
CEO approval
Business Outlook

Pros

decent pay, okay benefits I guess

Cons

everything else. horrible supervisors. my leads were okay.

Viewing 73 - 75 of 5,665 Reviews

Glassdoor has 6,056 Quest Diagnostics reviews submitted anonymously by Quest Diagnostics employees. Read employee reviews and ratings on Glassdoor to decide if Quest Diagnostics is right for you.