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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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Fastest Labs of Frederick (Preferred)

5950 Frederick Crossing Ln,

Ste 100

Frederick, MD 21704

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8.42 mi away

301-880-1258
Monday: 9:00 am-5:00 pm
Tuesday: 9:00 am-5:00 pm
Wednesday: 9:00 am-5:00 pm
Thursday: 9:00 am-5:00 pm
Friday: 9:00 am-5:00 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Aspen Ridge

165 Thomas Johnson Dr,

Liberty Professional Bldg, Suite H

Frederick, MD 21702

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10.24 mi away

Schedule Appointment 301-662-9298
Monday: 6:30 am-3:30 pm
Tuesday: 6:30 am-3:30 pm
Wednesday: 6:30 am-3:30 pm
Thursday: 6:30 am-3:30 pm
Friday: 6:30 am-3:30 pm
Saturday: 7:00 am-11:00 am
Sunday: Closed
Valley Health Ranson (Preferred)

100 Oak Lee Dr,

Ranson, WV 25438

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15.18 mi away

304-930-0001
Monday: 8:00 am-7:00 pm
Tuesday: 8:00 am-7:00 pm
Wednesday: 8:00 am-7:00 pm
Thursday: 8:00 am-7:00 pm
Friday: 8:00 am-7:00 pm
Saturday: 9:00 am-5:00 pm
Sunday: 9:00 am-5:00 pm
Quest Diagnostics - Leesburg

521 E. Market St,

Leesburg, VA 20176

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17.25 mi away

Schedule Appointment 703-777-7887
Monday: 7:30 am-12:00 pm , 1:00 pm-3:30 pm
Tuesday: 7:30 am-12:00 pm , 1:00 pm-3:30 pm
Wednesday: 7:30 am-12:00 pm , 1:00 pm-3:30 pm
Thursday: 7:30 am-12:00 pm , 1:00 pm-3:30 pm
Friday: 7:30 am-12:00 pm , 1:00 pm-3:30 pm
Saturday: 7:00 am-10:00 am
Sunday: Closed
Fastest Labs of Hagerstown (Preferred)

18438 Spark Dr,

Unit 203

Hagerstown, MD 21740

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18.98 mi away

240-382-3003
Monday: 9:00 am-4:30 pm
Tuesday: 9:00 am-4:30 pm
Wednesday: 9:00 am-4:30 pm
Thursday: 9:00 am-4:30 pm
Friday: 9:00 am-4:30 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Hagerstown MD

11110 Medical Campus Rd,

Ste 244

Hagerstown, MD 21742

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19.24 mi away

Schedule Appointment 240-850-3252
Monday: 7:00 am-12:30 pm , 1:00 pm-3:00 pm
Tuesday: 7:00 am-12:30 pm , 1:00 pm-3:00 pm
Wednesday: 7:00 am-12:30 pm , 1:00 pm-3:00 pm
Thursday: 7:00 am-12:30 pm , 1:00 pm-3:00 pm
Friday: 7:00 am-12:30 pm , 1:00 pm-3:00 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Lansdowne

19415 Deerfield Avenue,

Suite 115B

Leesburg, VA 20176

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19.82 mi away

Schedule Appointment 703-729-6732
Monday: 7:30 am-11:30 am , 12:30 pm-4:00 pm
Tuesday: 7:30 am-11:30 am , 12:30 pm-4:00 pm
Wednesday: 7:30 am-11:30 am , 12:30 pm-4:00 pm
Thursday: 7:30 am-11:30 am , 12:30 pm-4:00 pm
Friday: 7:30 am-11:30 am , 12:30 pm-4:00 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Germantown

20528 Boland Farm Road,

Suite 205

Germantown, MD 20876

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20.24 mi away

Schedule Appointment 301-972-2097
Monday: 7:30 am-12:00 pm , 1:00 pm-4:00 pm
Tuesday: 7:30 am-12:00 pm , 1:00 pm-4:00 pm
Wednesday: 7:30 am-12:00 pm , 1:00 pm-4:00 pm
Thursday: 7:30 am-12:00 pm , 1:00 pm-4:00 pm
Friday: 7:30 am-12:00 pm , 1:00 pm-4:00 pm
Saturday: 7:00 am-11:00 am
Sunday: Closed
Any Lab Test Now Ashburn (Preferred)

42775 Generation Dr,

Ste 100

Ashburn, VA 20147

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22.04 mi away

571-380-9944
Monday: 11:00 am-3:00 pm
Tuesday: 11:00 am-3:00 pm
Wednesday: 11:00 am-3:00 pm
Thursday: 11:00 am-3:00 pm
Friday: 11:00 am-3:00 pm
Saturday: Closed
Sunday: Closed
Valley Health Spring Mills (Preferred)

120 Campus Dr,

101

Martinsburg, WV 25404

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22.1 mi away

681-247-1250
Monday: 8:00 am-5:00 pm
Tuesday: 8:00 am-5:00 pm
Wednesday: 8:00 am-5:00 pm
Thursday: 8:00 am-5:00 pm
Friday: 8:00 am-5:00 pm
Saturday: Closed
Sunday: Closed
Valley Health Martinsburg (Preferred)

97 ADMINISTRATIVE DR,

MARTINSBURG, WV 25404

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22.45 mi away

304-350-3200
Monday: 8:00 am-4:30 pm
Tuesday: 8:00 am-4:30 pm
Wednesday: 8:00 am-4:30 pm
Thursday: 8:00 am-4:30 pm
Friday: 8:00 am-4:30 pm
Saturday: 9:00 am-6:00 pm
Sunday: 9:00 am-6:00 pm
CVS MinuteClinic - Sterling - 01427 (Preferred)

110 Edds Ln,

Sterling, VA 20165

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23.41 mi away

866-328-0403
Monday: Vary
Tuesday: Vary
Wednesday: Vary
Thursday: Vary
Friday: Vary
Saturday: Vary
Sunday: Vary
Quest Diagnostics - Sterling

14 Pidgeon Hill Dr,

Ste 130

Sterling, VA 20165

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23.61 mi away

Schedule Appointment 703-444-4844
Monday: 7:30 am-3:30 pm
Tuesday: 7:30 am-3:30 pm
Wednesday: 7:30 am-3:30 pm
Thursday: 7:30 am-3:30 pm
Friday: 7:30 am-3:30 pm
Saturday: Closed
Sunday: Closed
CareNow- Sterling (Preferred)

46200 Potomac Run Plz,

Sterling, VA 20164

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24.53 mi away

571-313-5087
Monday: 10:00 am-4:00 pm
Tuesday: 10:00 am-4:00 pm
Wednesday: 10:00 am-4:00 pm
Thursday: 10:00 am-4:00 pm
Friday: 10:00 am-4:00 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Ashburn

21785 Filigree Court,

Suite 204

Ashburn, VA 20147

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24.56 mi away

Schedule Appointment 571-223-0234
Monday: 7:30 am-3:30 pm
Tuesday: 7:30 am-3:30 pm
Wednesday: 7:30 am-3:30 pm
Thursday: 7:30 am-3:30 pm
Friday: 7:30 am-3:30 pm
Saturday: 7:00 am-11:00 am
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. © 2025 Quest Diagnostics Incorporated. All rights reserved. Image content features models and is intended for illustrative purposes only.