Quest Diagnostics
Lab Testing at Quest Diagnostics - Riverhead Harrison Ave
Quest Diagnostics Patient Service Center in Riverhead, NY 11901.
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Address
889 Harrison Ave Fl 1Riverhead, NY 11901
Suffolk County
Hours
| Monday | 6:00 AM – 3:00 PM |
| Tuesday | 6:00 AM – 3:00 PM |
| Wednesday | 6:00 AM – 3:00 PM |
| Thursday | 6:00 AM – 3:00 PM |
| Friday | 6:00 AM – 3:00 PM |
| Saturday | 6:00 AM – 12:00 PM |
| Sunday | Closed |
Nearby alternatives
- LabCorp Riverhead887 Old Country Rd Ste C, Riverhead, NY 119010.4 mi
- Citymd Of Riverhead999 Old Country Rd, Riverhead, NY 119010.5 mi
- Quest Diagnostics - Wading River6144 Route 25a Ste 8 Bldg B, Wading River, NY 117928 mi
- Quest Diagnostics - Hampton Bays Ny188 W Montauk Hwy Ste E6, Hampton Bays, NY 119468.6 mi
- LabCorp Mattituck10095 Main Rd, Mattituck, NY 119529 mi
More lab options around Riverhead
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.