Quest Diagnostics

Lab Testing at Quest Diagnostics - Smithtown Ny

Quest Diagnostics Patient Service Center in Smithtown, NY 11787.

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Popular tests at this location:

TSH Lipid Panel CBC A1C Testosterone Vitamin D CMP

Address

300 E Main St Ste 3a
Smithtown, NY 11787
Suffolk County

631-626-6201

Hours

Monday	6:00 AM – 3:30 PM
Tuesday	6:00 AM – 3:30 PM
Wednesday	6:00 AM – 3:30 PM
Thursday	6:00 AM – 3:30 PM
Friday	6:00 AM – 3:30 PM
Saturday	6:00 AM – 12:00 PM
Sunday	Closed

Nearby alternatives

LabCorp Smithtown
712 Smithtown Byp, Smithtown, NY 11787
0.6 mi
LabCorp Smithtown
10 W Main St, Smithtown, NY 11787
1 mi
Citymd Of Smithtown
519 W Jericho Tpke, Smithtown, NY 11787
2.1 mi
Citymd Of Lake Grove
1995 Nesconset Hwy, Lake Grove, NY 11755
2.4 mi
Citymd Of Hauppauge
812 Wheeler Rd, Hauppauge, NY 11788
2.7 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.