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Quest Diagnostics

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Lab testing, laboratory and office locations around the world

Quest Diagnostics has headquarters in the U.S. and operations in India, Ireland, and Mexico. Our products and services are used by customers in over 130 countries. We also collaborate with many international diagnostic laboratories, hospitals and clinics to help improve human health around the world.

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Quest Diagnostics - MANSFIELD HOSP

335 Glessner Ave,

Ste 200

Mansfield, OH 44903

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0.85 mi away

Schedule Appointment 419-914-1565
Monday: 7:00 am-5:00 pm
Tuesday: 7:00 am-5:00 pm
Wednesday: 7:00 am-5:00 pm
Thursday: 7:00 am-5:00 pm
Friday: 7:00 am-5:00 pm
Saturday: 8:00 am-12:00 pm
Sunday: Closed
Quest Diagnostics - BALGREEN DR

770 Balgreen Dr,

Ste 105

Mansfield, OH 44906

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2.36 mi away

Schedule Appointment 567-303-8785
Monday: 7:00 am-5:00 pm
Tuesday: 7:00 am-5:00 pm
Wednesday: 7:00 am-5:00 pm
Thursday: 7:00 am-5:00 pm
Friday: 7:00 am-5:00 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - WELLNESS CTR LAB - ONTARIO

1750 W 4th St,

Ontario, OH 44906

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2.63 mi away

Schedule Appointment 567-425-1555
Monday: 7:30 am-12:00 pm , 12:30 pm-3:30 pm
Tuesday: 7:30 am-12:00 pm , 12:30 pm-3:30 pm
Wednesday: 7:30 am-12:00 pm , 12:30 pm-3:30 pm
Thursday: 7:30 am-12:00 pm , 12:30 pm-3:30 pm
Friday: 7:30 am-12:00 pm , 12:30 pm-3:30 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Richland

1033 Ashland Rd,

Suite 135

Mansfield, OH 44905

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2.79 mi away

Schedule Appointment 567-333-1134
Monday: Closed
Tuesday: 8:00 am-12:00 pm , 12:30 pm-4:00 pm
Wednesday: Closed
Thursday: 8:00 am-12:00 pm , 12:30 pm-4:00 pm
Friday: Closed
Saturday: Closed
Sunday: Closed
Quest Diagnostics - LEXINGTON - E. MAIN ST.

231 E Main St,

Lexington, OH 44904

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6.46 mi away

Schedule Appointment 419-914-1570
Monday: 7:30 am-4:30 pm
Tuesday: 7:30 am-4:30 pm
Wednesday: 7:30 am-4:30 pm
Thursday: 7:30 am-4:30 pm
Friday: 7:30 am-4:30 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Baney

1941 S Baney Rd,

Suite 100

Ashland, OH 44805

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11.02 mi away

Schedule Appointment 567-215-3847
Monday: 7:30 am-12:30 pm , 1:00 pm-4:00 pm
Tuesday: 7:30 am-12:30 pm , 1:00 pm-4:00 pm
Wednesday: 7:30 am-12:30 pm , 1:00 pm-4:00 pm
Thursday: 7:30 am-12:30 pm , 1:00 pm-4:00 pm
Friday: 7:30 am-12:30 pm , 1:00 pm-4:00 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - SHELBY OUTPATIENT LAB

199 W Main St,

Shelby, OH 44875

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11.22 mi away

Schedule Appointment 567-425-1730
Monday: 7:00 am-6:00 pm
Tuesday: 7:00 am-6:00 pm
Wednesday: 7:00 am-6:00 pm
Thursday: 7:00 am-6:00 pm
Friday: 7:00 am-6:00 pm
Saturday: 7:00 am-11:30 am
Sunday: Closed
Quest Diagnostics - Samaritan - Ashland

1025 Center St,

Suite 101

Ashland, OH 44805

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13.27 mi away

Schedule Appointment 567-215-3863
Monday: 6:00 am-6:00 pm
Tuesday: 6:00 am-6:00 pm
Wednesday: 6:00 am-6:00 pm
Thursday: 6:00 am-6:00 pm
Friday: 6:00 am-6:00 pm
Saturday: 8:00 am-12:00 pm
Sunday: Closed
Quest Diagnostics - 663 E Main St-Ashland

633 E Main St,

Ste 150

Ashland, OH 44805

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13.85 mi away

Schedule Appointment 567-215-3858
Monday: 7:00 am-3:30 pm
Tuesday: 7:00 am-3:30 pm
Wednesday: 7:00 am-3:30 pm
Thursday: 7:00 am-3:30 pm
Friday: 7:00 am-3:30 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - ASHLAND - OHIO HEALTHWAY

1720 Ohiohealth Way,

Ste 1200

Ashland, OH 44805

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14.77 mi away

Schedule Appointment 567-425-1575
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
Quest Diagnostics - Kettering

546 N Union St,

Suite 66

Loudonville, OH 44842

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17.88 mi away

Schedule Appointment 330-521-6916
Monday: 8:00 am-12:00 pm , 12:30 pm-4:30 pm
Tuesday: Closed
Wednesday: Closed
Thursday: Closed
Friday: 8:00 am-12:00 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - BUCYRUS - N. SANDISKY AVE.

725 N Sandusky Ave,

Ste 2

Bucyrus, OH 44820

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24.03 mi away

Schedule Appointment 567-409-9040
Monday: 7:00 am-12:00 pm , 1:00 pm-4:00 pm
Tuesday: 7:00 am-12:00 pm , 1:00 pm-4:00 pm
Wednesday: 7:00 am-12:00 pm , 1:00 pm-4:00 pm
Thursday: 7:00 am-12:00 pm , 1:00 pm-4:00 pm
Friday: 7:00 am-12:00 pm , 1:00 pm-4:00 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - MARION - UNIVERSITY DR

130 University Dr,

Ste 1200

Marion, OH 43302

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32.5 mi away

Schedule Appointment 567-908-9375
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
Quest Diagnostics - MARION LAB -DELAWARE AVE.

1040 Delaware Ave,

Marion, OH 43302

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34.2 mi away

Schedule Appointment 567-908-9161
Monday: 7:00 am-5:30 pm
Tuesday: 7:00 am-5:30 pm
Wednesday: 7:00 am-5:30 pm
Thursday: 7:00 am-5:30 pm
Friday: 7:00 am-5:30 pm
Saturday: 8:00 am-12:00 pm
Sunday: Closed
Quest Diagnostics - Marion

1069 Delaware Ave,

Ste B

Marion, OH 43302

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34.33 mi away

Schedule Appointment 419-560-1738
Monday: 7:00 am-3:00 pm
Tuesday: 7:00 am-3:00 pm
Wednesday: 7:00 am-3:00 pm
Thursday: 7:00 am-3:00 pm
Friday: 7:00 am-3:00 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - GRADY HOSP

561 W Central Ave,

First Floor

Delaware, OH 43015

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43.54 mi away

Schedule Appointment 614-395-7505
Monday: 7:00 am-5:00 pm
Tuesday: 7:00 am-5:00 pm
Wednesday: 7:00 am-5:00 pm
Thursday: 7:00 am-5:00 pm
Friday: 7:00 am-5:00 pm
Saturday: 8:00 am-12:00 pm
Sunday: Closed
Quest Diagnostics - DELAWARE - LEXINGTON BLVD

6 Lexington Blvd,

Delaware, OH 43015

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43.76 mi away

Schedule Appointment 220-246-0500
Monday: 7:30 am-12:30 pm , 1:00 pm-4:30 pm
Tuesday: 7:30 am-12:30 pm , 1:00 pm-4:30 pm
Wednesday: 7:30 am-12:30 pm , 1:00 pm-4:30 pm
Thursday: 7:30 am-12:30 pm , 1:00 pm-4:30 pm
Friday: 7:30 am-12:30 pm , 1:00 pm-4:30 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - WILLIAM ST

2295 W William St,

Ste 200

Delaware, OH 43015

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44.61 mi away

Schedule Appointment 220-262-0985
Monday: 7:00 am-12:30 pm , 1:00 pm-4:00 pm
Tuesday: 7:00 am-12:30 pm , 1:00 pm-4:00 pm
Wednesday: 7:00 am-12:30 pm , 1:00 pm-4:00 pm
Thursday: 7:00 am-12:30 pm , 1:00 pm-4:00 pm
Friday: 7:00 am-12:30 pm , 1:00 pm-4:00 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Medina - Carrick Dr.

4001 Carrick Dr,

Ste 130

Medina, OH 44256

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45.06 mi away

Schedule Appointment 216-559-7564
Monday: 7:00 am-5:00 pm
Tuesday: 7:00 am-5:00 pm
Wednesday: 7:00 am-5:00 pm
Thursday: 7:00 am-5:00 pm
Friday: 7:00 am-5:00 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Lake Medina

3780 Medina Rd,

Medina, OH 44256

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45.21 mi away

Schedule Appointment 330-421-8295
Monday: 7:30 am-4:30 pm
Tuesday: 7:30 am-4:30 pm
Wednesday: 7:30 am-4:30 pm
Thursday: 7:30 am-4:30 pm
Friday: 7:30 am-4:30 pm
Saturday: 8:00 am-12:00 pm
Sunday: Closed
Quest Diagnostics - DELAWARE HC - OHIOHEALTH BLVD.

801 Ohio Health Blvd,

Suite Number #100

Delaware, OH 43015

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45.43 mi away

Schedule Appointment 220-246-1404
Monday: 7:30 am-4:00 pm
Tuesday: 7:30 am-4:00 pm
Wednesday: 7:30 am-4:00 pm
Thursday: 7:30 am-4:00 pm
Friday: 7:30 am-4:00 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - 917 N Lake St-Amherst

917 N Lake St,

Ste140-open Iop

Amherst, OH 44001

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47.1 mi away

Schedule Appointment 440-396-9450
Monday: 7:00 am-5:00 pm
Tuesday: 7:00 am-5:00 pm
Wednesday: 7:00 am-5:00 pm
Thursday: 7:00 am-5:00 pm
Friday: 7:00 am-5:00 pm
Saturday: 8:00 am-12:00 pm
Sunday: Closed
Quest Diagnostics - Gates

125 E Broad St,

Ste 301

Elyria, OH 44035

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47.44 mi away

Schedule Appointment 440-396-2374
Monday: 6:30 am-5:00 pm
Tuesday: 6:30 am-5:00 pm
Wednesday: 6:30 am-5:00 pm
Thursday: 6:30 am-5:00 pm
Friday: 6:30 am-5:00 pm
Saturday: 8:00 am-12:00 pm
Sunday: Closed
Quest Diagnostics - Tri-City Elyria

1120 E Broad St,

Suite 100

Elyria, OH 44035

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47.87 mi away

Schedule Appointment 440-433-8605
Monday: 7:30 am-12:30 pm , 1:00 pm-4:00 pm
Tuesday: 7:30 am-12:30 pm , 1:00 pm-4:00 pm
Wednesday: 7:30 am-12:30 pm , 1:00 pm-4:00 pm
Thursday: 7:30 am-12:30 pm , 1:00 pm-4:00 pm
Friday: 7:30 am-12:30 pm , 1:00 pm-4:00 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - WESTERVILLE LAB - POLARIS

300 Polaris Pkwy,

Ste 130

Westerville, OH 43082

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47.92 mi away

Schedule Appointment 220-246-2530
Monday: 6:30 am-5:00 pm
Tuesday: 6:30 am-5:00 pm
Wednesday: 6:30 am-5:00 pm
Thursday: 6:30 am-5:00 pm
Friday: 6:30 am-5:00 pm
Saturday: 8:00 am-12:00 pm
Sunday: Closed
Quest Diagnostics - LEWIS CENTER

7853 Pacer Dr,

Ste 3E

Delaware, OH 43015

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48.24 mi away

Schedule Appointment 740-513-9770
Monday: 7:30 am-4:30 pm
Tuesday: 7:30 am-4:30 pm
Wednesday: 7:30 am-4:30 pm
Thursday: 7:30 am-4:30 pm
Friday: 7:30 am-4:30 pm
Saturday: Closed
Sunday: Closed

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Quest® is the brand name used for services offered by Quest Diagnostics Incorporated and its affiliated companies. Quest Diagnostics Incorporated and certain affiliates are CLIA-certified laboratories that provide HIPAA-covered services.  Other affiliates operated under the Quest® brand, such as Quest Consumer Inc., do not provide HIPAA-covered services. 

 

Quest®, Quest Diagnostics®, any associated logos, and all associated Quest Diagnostics registered or unregistered trademarks are the property of Quest Diagnostics. All third-party marks—® and ™—are the property of their respective owners. © 2026 Quest Diagnostics Incorporated. All rights reserved. Image content features models and is intended for illustrative purposes only.