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Clinical and Forensic

The toxicology laboratory has provided clinical, emergency and forensic toxicology, ethanol, and other volatiles testing, therapeutic drug monitoring, and medical-legal services for the past 31 years. Formally established in 1970 to support the Hennepin County Medical Examiner's office, the laboratory now supports 8 medical examiners or coroners offices in a five-state region. The laboratory provides drugs of abuse testing for city, county, and state agencies, public and private industry, several emergency departments in the Twin Cities, athletic teams, halfway houses, correctional facilities, and drug courts. The laboratory also provides adult and pediatric lead screening programs.

General Lab Numbers

612- 904-4435 (FAX)

Mailing Address

Toxicology Laboratory
Hennepin County Medical Center
Clinical Labs MC P4
701 Park Avenue, Minneapolis, MN 55415

Accreditation Certification

College of American Pathologists - Toxicology (PDF)

Toxicology Staff

Toxicology Technical Staff
The technical staff are highly trained, with degrees in medical technology or biology and are certified by the American Society of Clinical Pathologists as Medical Technologists and the National Credentialing Agency, Inc. as Clinical Laboratory Scientists


The Toxicology Laboratory is certified by the College of American Pathologists for both the general lab and the Forensic Urine Drug Testing and the State of Minnesota for drug testing in the workplace. They participate in College of American Pathologists proficiency testing in general toxicology and Forensic Urine Drug Testing. In addition, the laboratory is certified by the American Board of Forensic Toxicology, meeting the standards acceptable to the National Association of Medical Examiners (NAME) to provide forensic toxicology testing for the medical examiner and coroners offices.


The Toxicology laboratory provides a 24/7/365 full menu of services, from the chain of custody specimen collection, secure transportation of specimens to the laboratory, drug screening, and confirmation analytical services, verification of results by board-certified scientists, and confidential reporting of findings. Specimens are collected daily for non-DOT collections only. All testing is performed on-site. The following reviews the comprehensive services provided.

The Toxicology Laboratory provides the following services:

  • Urine tests for drugs of abuse, including amphetamine, barbiturates, benzodiazepines (such as Valium, Xanax), ecstasy (MDMA), cocaine, heroin (6-MAM), LSD, marijuana (THC), methadone, opiates including oxycodone, phencyclidine or “angel dust”, propoxyphene, or any combination of these or other substances. Confirmation of presumptive positive screening results by GC/MS or LC/MS/MS.
  • Urine tests for pain clinic management, including amphetamine, benzodiazepines (such as Valium, Xanax), buprenorphine, carisoprodol, cocaine, ethyl glucuronide (ETG), fentanyl, heroin (6-MAM), methadone
  • Point of care test screening for immediate turn around times for amphetamines, barbiturates, cocaine metabolite, opiates, PCP and THC
  • Blood ethanol medical-legal screening and confirmation analysis by gas chromatography, with additional tests available for acetone, ethylene glycol, isopropanol, methanol, and propylene glycol.
  • Forensic testing, qualitative screening, and quantitative analysis, for drugs in tissues and other body fluids, with an average turnaround time of two-weeks.
  • Professional consultative expertise providing extensive legal, medical, laboratory, and courtroom experience and expert witness testimony.
  • Complete documentation of the chain of custody procedures that ensures results will withstand legal challenges.
  • Emergency qualitative screens and quantitative drug testing 24 hours a day, seven days a week for emergency rooms, clinical laboratories, physician offices, and clinics.
  • Comprehensive therapeutic drug monitoring for patients on medication.
  • Secure, certified testing facility, including specimen storage and record storage, to ensure confidentiality.
  • Quality control measures and proficiency testing for staff.
  • Computerized reporting and billing.
  • Competitive rates for professional services.

Toxicology Laboratory Education

The toxicology laboratory has provided educational opportunities and teaching expertise for since 1982.

Since 1982 the laboratory has trained over 80 laboratory medicine and pathology medical residents from both the Hennepin Healthcare's and the University of Minnesota's residency programs, over 20 Forensic Pathology Fellows affiliated with the Hennepin County Medical Examiner's Office, and 13 PhD Postdoctoral Scientists affiliated with the University of Minnesota's Clinical Chemistry Fellowship Program.

Undergraduate Level
Over 100 students from both the Schools of Medical Technology and Medical Laboratory Technicians have gained training towards their baccalaureate degrees in clinical and forensic toxicology.

Individual trainees within the department have secured jobs ranging from Medical Examiners, Directors of Clinical Laboratories in Clinical Chemistry and Toxicology in hospitals and industry, research scientist positions, clinical laboratory managers, supervisors, medical technologists, and technicians in hospitals, private reference laboratories, industry, and research.

Clinical Laboratory

Labs support of the diagnosis, treatment, and follow-up of patient clinical conditions.


Full-service lab offering high-quality analyses, biopsies, and products of conception. 

Electron Microscopy

Evaluation of body tissues, light microscopy, and complex staining techniques.

Neuromuscular Pathology

Quality interpretation of neuromuscular biopsy specimens.

Renal Pathology

Available 24/7 and offer quality, timely interpretations of patient renal biopsies.


Clinical, emergency and forensic toxicology, ethanol and therapeutic drug monitoring.


contact photo only colleen crampton

Colleen Crampton, MT (ASCP), MBA

Laboratory Administrative Director
General Laboratory Operations
[email protected]

contact photo only zachary neumann lab coordinator

Zachary Neumann

Outreach Coordinator
[email protected]

Kendra Schmidt

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