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About CLS Diagnostics

CLS Diagnostics is a specialist toxicology testing service in Franklin, Massachusetts. Three local pain management physicians founded CLS Diagnostics, determined to provide the most reliable and accurate drug testing services to medical practitioners with the shortest possible turnaround times.

With its physician-led background, CLS Diagnostics is a company whose staff understands the responsibilities of a medical professional. The company uses state-of-the-art equipment for testing and analysis, including enzyme immunoassay and liquid chromatography-tandem mass spectrometry (LC-MS/MS), ensuring results are accurate and delivered quickly.

CLS Diagnostics only uses licensed and certified toxicologists — dedicated professionals who’re happy to discuss any aspect of the testing procedure with you and answer your questions. The team is keen to work with physicians to improve their understanding of drug testing and ensure clients can feel confident in the service provided.

The team at CLS Diagnostics prepare detailed reports on the results of tests for people who’ve requested them. They send the reports via secure email, or the documents with the results can be accessed through their online portal.

Facilitating the coordination and efficacy of patient testing, the CLS Diagnostics team excels in combining the highest-quality testing services for controlled substances with outstanding customer service.


CLS Diagnostics
750 Union St, Lower Level
Franklin, MA 02038
Phone: 508-809-8533
Fax: 508-520-3928

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