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Outage notice:

Due to the global information outage that occurred Friday, Quest is taking swift action to respond, recover and restore our operations. Our Patient Services are operating with reduced capacity so you may experience longer wait and service times. Our Customer Contact teams are currently unavailable. We appreciate your patience as we work toward returning to normal operations. 


COVID-19 Safety Measures:

Cough, sneezing, sore throat? Protect yourself and others by wearing a mask.


2035 Ralph Ave
Ste B1
Brooklyn, NY 11234


We offer broad access to clinical testing services through our national network of laboratories in most major metropolitan areas as well as approximately 2,000 patient locations.

Landmark : PSC located in Scott Medical Plaza. Handicap entrance is located at the corner of Avenue K and 72nd Street.


  • 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:

    7:00 am-4:00 pm
  • Sunday:

    8:00 am-1:00 pm


As the world’s leading provider of diagnostic information services, our employees work every day to uncover insights about your body that empower you with the information you need to make your healthcare decisions count.

Making a Difference Every Single Day


Tests are performed annually across the nation


We have locations across the United States


Tests available for all kinds of conditions and specialties


We serve many different organizations and industries