Equipment & Methodology

Our presumptive testing uses immunoassay technology to determine qualitative results. Confirmation of drugs or metabolites is achieved using liquid chromatography coupled with tandem mass spectrometry. Our analytical assays are competitive with other similar laboratories with regards to sensitivity and robustness. These tools and methodologies have become the clinical laboratory industry standard.

Test Menu
Our comprehensive urine drug test menu offers providers and programs broad based access and flexibility. Crestar has over 100 parent drug and metabolites for analysis and includes all of the major drug classes. We can be an ideal solution for clinics that focus on the following services:

  • Medication Monitoring
  • Substance abuse
  • Opioid addiction treatment
  • Workers Compensation
  • Primary Care
  • Mental Health
  • OB/GYN

We know you have other choices in the laboratory industry. Crestar focuses on quality analysis and customer support. We offer these competitive advantages over other service providers:

  • Clinically actionable cutoff concentrations
  • Sophisticated confirmation methodology
  • Prompt and friendly laboratory and technical support
  • 24hr reporting from date of receipt

For a complete list of urine drug tests available please click here.

Oral Fluid
Coming Soon!

Crestar reporting is all-inclusive and easy accessible. We can tailor needs to your clinic, provider or program. Our reports digest complex information so that you don’t have to. Reports may include the following:

  • Qualitative and quantitative results
  • Adjusted urine drug concentrations relative to patient hydration
  • Urine validity specifications (indicating, adulteration, diversion or dilution)
  • Outcome based associations indicating consistent or not with a drug regimen
  • Detection window estimates based on current research and available literature
  • Brand and generic names for easy interpretation

Sample Submission
Please contact for our easy to follow and informative protocol for collecting urine and oral fluid specimens.

Sample Storage
If not shipping immediately or the day of collection, samples should be stored under refrigerated conditions (2 to 8° C) until shipment to the laboratory. Please contact for further details.

Sample Shipment
Shipment instructions will be provided upon enrollment for our services. Please contact for further details.

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