Pentucket Medical provides clinical laboratory and pathological diagnosis (histology) services to health care providers in the Merrimack Valley and beyond. The presence of laboratory and histology services in our Haverhill location is an important advantage to our patients and to the physicians who care for them, giving them access to test results in a faster way than if the work were outsourced.

Pentucket Labs is a clinical laboratory owned and operated by a group of experienced laboratory professionals, physicians and medical technology experts, providing diagnostic testing to improve patient care. We are one of the best-equipped and busiest clinical labs in Massachusetts, providing more than 2 million test results per year to hospitals, physician groups and care facilities in Massachusetts and New Hampshire.

"High quality histology is crucial to accurate pathological diagnosis," says Dr. George Kwass, a Haverhill-based pathologist who interacts on a nearly daily basis with Pentucket's histology service.
"Pentucket Medical is fortunate to have such a high quality histology laboratory with state of the art equipment and talented histo-technologists."

If you are a hospital, medical group or other healthcare provider in need of a diagnostic laboratory partner, we invite you to contact Dwayne Garland, Pentucket Medical's Director of Ancillary Services, either by phone at (978) 469-5633 or by email at

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Laboratory Hours

Mon-Fri: 7:00 am - 6:00 pm
Saturday: 7:30 am - 11:30 am

Mon-Fri: 7:30 am - 5:00 pm

Mon-Fri: 7:00 am - 4:45 pm

Laboratory Locations

One Park Way
Haverhill, MA 01830
Phone: 888-227-3762

500 Merrimack St.
Lawrence, MA 01843
Phone: (888) 227-3762

ExpressCare RiverWalk
360 Merrimack St.
Lawrence, MA 01843
Phone: (888) 227-3762

260 Merrimac St.
Newburyport, MA 01950
Phone: (888) 227-3762

66 East Main St.
Georgetown, MA 01833
Phone: (978) 352-8375

North Andover
630 Turnpike St.
North Andover, MA 01845
Phone: (978) 794-2112