Quest Diagnostics

Lab Testing at Quest Diagnostics - Darien

Quest Diagnostics Patient Service Center in Darien, CT 06820.

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Popular tests at this location:

TSH Lipid Panel CBC A1C Testosterone Vitamin D CMP

Address

557 Post Rd
Darien, CT 06820
Fairfield County

475-328-4366

Hours

Monday	7:00 AM – 4:00 PM
Tuesday	7:00 AM – 4:00 PM
Wednesday	7:00 AM – 4:00 PM
Thursday	7:00 AM – 4:00 PM
Friday	7:00 AM – 4:00 PM
Saturday	Closed
Sunday	Closed

Nearby alternatives

Quest Diagnostics - Norwalk 148 East Avenue - Employer Drug Testing Not Offered
148 East Ave, Norwalk, CT 06851
3.4 mi
Quest Diagnostics - Norwalk Cross Street - Employer Drug Testing Not Offered
40 Cross St Ste 260, Norwalk, CT 06851
3.4 mi
LabCorp Norwalk
55 Westport Ave, Norwalk, CT 06851
4 mi
LabCorp Stamford
1290 Summer St Ste 5100, Stamford, CT 06905
4.3 mi
Quest Diagnostics - Stamford Summer St
1250 Summer St Ste 203, Stamford, CT 06905
4.3 mi

About this location

Quest Diagnostics Patient Service Center. Quest Diagnostics operates one of the largest networks of clinical laboratories in the United States, offering a wide range of diagnostic tests for patients, physicians, and employers.

Listing last updated 2026-04-25.