• Several Locations to Serve You
    Several Locations to Serve You We have 8 locations in the Greater Tampa Bay and SW Florida areas serving Hillsborough, Pinellas, Pasco, Collier and Lee counties.
  • Full Spectrum of Tests
    Full Spectrum of Tests Granite Diagnostic Laboratories offers a full array of laboratory tests that include over 90% of all laboratory tests ordered by your physician.

Rock Solid Service, Rock Solid Results

Granite Diagnostic Laboratories is a local laboratory serving the Greater Tampa Bay and Southwest FL areas since 1999. We specialize in accurate and efficient resulting of laboratory tests. Our highly trained staff will provide you quality service with no hassles.

  • State-of-the-art testing equipment
  • Our in-house billing provides continuity of  service
  • No waiting on hold with a central call center
  • Fast, friendly service
  • True STAT reporting in 2 hours or less
  • No supply headaches
  • Competitive client pricing


Wellness Tips

The liver has many functions.


COLA logo

Winner of the COLA Laboratory Excellence Award for twelve consecutive years!

Granite Goes Green

go greenIn May 2010, Granite Diagnostic Laboratories upgraded its lab information system to enable us to provide laboratory results online. Through a secure server that’s password protected, GDL is able to provide its client physicians direct access to laboratory results from any device connected to the web…24x7. This has eliminated GDL from having to print a significant amount of laboratory results on paper. Our goal is to cut our paper consumption by 85%. Additionally, direct access by our clients eliminates our couriers from having to hand deliver results, thus minimizing hydrocarbon emissions by less miles driven.