Skip to main content

In-home sample collection may be available in your area for purchase through Quest Mobile™

When scheduling an appointment online, use your zip code (not city name) for best results. After entering your zip code, a Quest Mobile option will appear if it’s available for purchase in your area. Let’s check

Hide
Quest Diagnostics

Location search

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.

Search for a lab testing location to schedule an appointment

Required

Search

Looking for a facility or operation that is not a lab testing location?

US Facilities & Operations International Facilities & Operations

List

Quest Diagnostics - Turlock East Tuolumne - Employer Drug Testing Not Offered

981 East Tuolumne Road,

Suite 100

Turlock, CA 95382

Get Directions
ds-icon--pin Created with Sketch.

5.53 mi away

Schedule Appointment 209-202-9569
Monday: 6:00 am-4:00 pm
Tuesday: 6:00 am-4:00 pm
Wednesday: 6:00 am-4:00 pm
Thursday: 6:00 am-4:00 pm
Friday: 6:00 am-4:00 pm
Saturday: 7:00 am-12:00 pm
Sunday: Closed
Quest Diagnostics - Turlock East Hawkeye Avenue

777 E Hawkeye Ave,

Ste 1

Turlock, CA 95380

Get Directions
ds-icon--pin Created with Sketch.

5.87 mi away

Schedule Appointment 209-202-9175
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 - Ceres East Whitmore Avenue

2531 E Whitmore Ave,

Ste P

Ceres, CA 95307

Get Directions
ds-icon--pin Created with Sketch.

11.67 mi away

Schedule Appointment 209-581-0155
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: 7:00 am-11:00 am
Sunday: Closed
Quest Diagnostics - Modesto E Orangeburg Ave

2222 E Orangeburg Ave,

Suite 104

Modesto, CA 95355

Get Directions
ds-icon--pin Created with Sketch.

14.17 mi away

Schedule Appointment 888-277-8772
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 - Employer Drug Screens Not Offered - Atwater Commerce Ave

1271 Commerce Ave,

Shops 5

Atwater, CA 95301

Get Directions
ds-icon--pin Created with Sketch.

15.38 mi away

Schedule Appointment 209-628-7860
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 - Modesto 6th Street

1008 6th Street,

Suite C

Modesto, CA 95354

Get Directions
ds-icon--pin Created with Sketch.

15.47 mi away

Schedule Appointment 209-569-0379
Monday: 6:30 am-2:30 pm
Tuesday: 6:30 am-2:30 pm
Wednesday: 6:30 am-2:30 pm
Thursday: 6:30 am-2:30 pm
Friday: 6:30 am-2:30 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Modesto McHenry Avenue - Employer Drug Testing Not Offered

1524 Mchenry Ave,

Ste 120

Modesto, CA 95350

Get Directions
ds-icon--pin Created with Sketch.

15.89 mi away

Schedule Appointment 209-575-4559
Monday: 6:00 am-4:00 pm
Tuesday: 6:00 am-4:00 pm
Wednesday: 6:00 am-4:00 pm
Thursday: 6:00 am-4:00 pm
Friday: 6:00 am-4:00 pm
Saturday: 6:30 am-12:00 pm
Sunday: Closed
Quest Diagnostics - Oakdale South Oak Avenue

250 S. Oak Ave,

Bldg C, Ste 2

Oakdale, CA 95361

Get Directions
ds-icon--pin Created with Sketch.

16.22 mi away

Schedule Appointment 209-845-2911
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 - Modesto Pelandale Ave

3525 Pelandale Ave,

Modesto, CA 95356

Get Directions
ds-icon--pin Created with Sketch.

20.15 mi away

Schedule Appointment 209-222-1754
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 - Merced G Street - Employer Drug Testing Not Offered

3377 G Street,

Ste A

Merced, CA 95340

Get Directions
ds-icon--pin Created with Sketch.

20.78 mi away

Schedule Appointment 209-388-1046
Monday: 5:30 am-4:30 pm
Tuesday: 5:30 am-4:30 pm
Wednesday: 5:30 am-4:30 pm
Thursday: 5:30 am-4:30 pm
Friday: 5:30 am-4:30 pm
Saturday: 7:00 am-12:00 pm
Sunday: Closed
Quest Diagnostics - Merced West Childs Avenue - Employer Drug Testing Not Offered

857 W Childs Ave,

Merced, CA 95341

Get Directions
ds-icon--pin Created with Sketch.

21.81 mi away

Schedule Appointment 209-725-0658
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 - Patterson Sperry

1045 Sperry Ave,

Ste D

Patterson, CA 95363

Get Directions
ds-icon--pin Created with Sketch.

22.05 mi away

Schedule Appointment 209-202-9293
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 - Merced East 13th - Employer Drug Testing Not Offered

240 East 13th Street,

Suite A

Merced, CA 95340

Get Directions
ds-icon--pin Created with Sketch.

22.31 mi away

Schedule Appointment 209-383-3531
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 - Manteca East Commerce Avenue

293 East Commerce Ave,

Manteca, CA 95336

Get Directions
ds-icon--pin Created with Sketch.

29.72 mi away

Schedule Appointment 209-823-2560
Monday: 6:30 am-4:00 pm
Tuesday: 6:30 am-4:00 pm
Wednesday: 6:30 am-4:00 pm
Thursday: 6:30 am-4:00 pm
Friday: 6:30 am-4:00 pm
Saturday: 6:30 am-10:30 am
Sunday: Closed
Quest Diagnostics - Manteca Norman Drive - Employer Drug Testing Not Offered

1140 Norman Dr,

Ste 2

Manteca, CA 95336

Get Directions
ds-icon--pin Created with Sketch.

29.9 mi away

Schedule Appointment 209-825-4158
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 - Employer Drug Screens Not Offered - Los Banos West I Street

730 W I St,

Los Banos, CA 93635

Get Directions
ds-icon--pin Created with Sketch.

33.84 mi away

Schedule Appointment 209-827-3628
Monday: 6:30 am-3:00 pm
Tuesday: 6:30 am-3:00 pm
Wednesday: 6:30 am-3:00 pm
Thursday: 6:30 am-3:00 pm
Friday: 6:30 am-3:00 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Sonora Crossroads

1031 Sanguinetti Rd,

Ste B

Sonora, CA 95370

Get Directions
ds-icon--pin Created with Sketch.

35.76 mi away

Schedule Appointment 209-630-0257
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 - Chowchilla Trinity Avenue - Employer Drug Testing Not Offered

341 Trinity Ave,

Chowchilla, CA 93610

Get Directions
ds-icon--pin Created with Sketch.

38.69 mi away

Schedule Appointment 559-665-7286
Monday: 6:00 am-2:00 pm
Tuesday: 6:00 am-2:00 pm
Wednesday: 6:00 am-2:00 pm
Thursday: 6:00 am-2:00 pm
Friday: 6:00 am-2:00 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Tracy 1832 W 11th St

1832 W 11Th St,

Tracy, CA 95376

Get Directions
ds-icon--pin Created with Sketch.

40.01 mi away

Schedule Appointment 209-830-1350
Monday: 6:30 am-4:00 pm
Tuesday: 6:30 am-4:00 pm
Wednesday: 6:30 am-4:00 pm
Thursday: 6:30 am-4:00 pm
Friday: 6:30 am-4:00 pm
Saturday: 7:00 am-11:00 am
Sunday: Closed
Quest Diagnostics - Mariposa Highway 49

5300 Highway 49 N,

Mariposa, CA 95338

Get Directions
ds-icon--pin Created with Sketch.

40.48 mi away

Schedule Appointment 209-966-2529
Monday: 7:00 am-11:30 am , 12:30 pm-4:00 pm
Tuesday: 7:00 am-11:30 am , 12:30 pm-4:00 pm
Wednesday: 7:00 am-11:30 am , 12:30 pm-4:00 pm
Thursday: 7:00 am-11:30 am , 12:30 pm-4:00 pm
Friday: 7:00 am-11:30 am , 12:30 pm-4:00 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Stockton East Magnolia

510 E. Magnolia Street,

STE 130

Stockton, CA 95202

Get Directions
ds-icon--pin Created with Sketch.

41.1 mi away

Schedule Appointment 209-941-2468
Monday: 6:30 am-5:30 pm
Tuesday: 6:30 am-5:30 pm
Wednesday: 6:30 am-5:30 pm
Thursday: 6:30 am-5:30 pm
Friday: 6:30 am-5:30 pm
Saturday: 7:00 am-12:00 pm
Sunday: Closed
Quest Diagnostics - Stockton 1801 East March

1801 E March Ln,

Ste B200

Stockton, CA 95210

Get Directions
ds-icon--pin Created with Sketch.

43.03 mi away

Schedule Appointment 209-956-2815
Monday: 6:30 am-4:30 pm
Tuesday: 6:30 am-4:30 pm
Wednesday: 6:30 am-4:30 pm
Thursday: 6:30 am-4:30 pm
Friday: 6:30 am-4:30 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - 2291 West March

2291 W March Ln,

Ste F145

Stockton, CA 95207

Get Directions
ds-icon--pin Created with Sketch.

44.02 mi away

Schedule Appointment 209-951-5831
Monday: 7:30 am-3:00 pm
Tuesday: 7:30 am-3:00 pm
Wednesday: 7:30 am-3:00 pm
Thursday: 7:30 am-3:00 pm
Friday: 7:30 am-3:00 pm
Saturday: Closed
Sunday: Closed
Quest Diagnostics - Stockton W March Ln - Employer Drug Testing Not Offered

3132 W March Ln,

Ste 1

Stockton, CA 95219

Get Directions
ds-icon--pin Created with Sketch.

44.45 mi away

Schedule Appointment 209-956-2624
Monday: 6:30 am-4:00 pm
Tuesday: 6:30 am-4:00 pm
Wednesday: 6:30 am-4:00 pm
Thursday: 6:30 am-4:00 pm
Friday: 6:30 am-4:00 pm
Saturday: 7:00 am-11:00 am
Sunday: Closed
Quest Diagnostics - Employer Drug Screens Not Offered - Hammer Lane

1708 W Hammer Ln,

Stockton, CA 95209

Get Directions
ds-icon--pin Created with Sketch.

45.63 mi away

Schedule Appointment 209-955-1288
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 - Lodi South Fairmont - Employer Drug Testing Not Offered

845 S Fairmont Ave,

Ste 6

Lodi, CA 95240

Get Directions
ds-icon--pin Created with Sketch.

49.43 mi away

Schedule Appointment 209-367-4468
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 - Lodi South Ham Lane

801 S Ham Ln,

Ste 1

Lodi, CA 95242

Get Directions
ds-icon--pin Created with Sketch.

49.58 mi away

Schedule Appointment 209-333-9796
Monday: 6:30 am-5:30 pm
Tuesday: 6:30 am-5:30 pm
Wednesday: 6:30 am-5:30 pm
Thursday: 6:30 am-5:30 pm
Friday: 6:30 am-5:30 pm
Saturday: 7:00 am-12:00 pm
Sunday: Closed

Our focus on your safety

Our safety precautions help ensure your confidence and comfort while visiting our Patient Service Centers to get the testing you need, today and every day.

Learn More

Our company

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.