Skip to main content

We are moving to a new office location!

Our Franklin office is closed today Wed March 10 and tomorrow March 11th.

The Franklin office will reopen on Friday March 12 at its new address

750 Union St
Lower Level
Franklin, MA 02038

If you need to contact the Franklin office while in transition please email the office at

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.

amphetamine testing
What Amphetamine Testing Can Help You Discover

Though millions of Americans use prescription amphetamines to control health issues like ADHD, roughly 6% have misused them in the last year. Amphetamine testing can reveal if your patients are using their prescription as directed or abusing drugs.


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

Office Hours

Get in touch