Benjamin Henkle, MD

Pain Management & Physiatry · Managing Director

Dr. Henkle is board certified in pain management and physiatry and serves as managing director of Lowell Spine & Pain Associates. His care focuses on restoring function and quality of life for people living with pain.

He studied neurobiology and physiology at Purdue University, with a minor in psychology, graduating with Phi Beta Kappa honors. He earned his medical degree and completed his Physical Medicine and Rehabilitation residency at Indiana University, followed by an ACGME-accredited Pain Management fellowship.

His clinical interests include chronic neck and back pain, nerve pain, cancer pain, and acute and chronic orthopedic injuries.

Alexandra Adler, MD

Pain Management & Anesthesiology

Dr. Adler is a board-certified pain management specialist and anesthesiologist. She joined the practice in 2020 and also works as an anesthesiologist at Lowell General Hospital.

She graduated magna cum laude from Yale University with Phi Beta Kappa honors. As a Gates Cambridge Fellow, she earned a Master of Philosophy in Biological Sciences at the University of Cambridge before completing her medical degree at Yale. She completed her anesthesiology residency and chronic pain fellowship at Massachusetts General Hospital.

Her interests include pelvic pain, peripheral nerve pain, chronic back pain, and non-medication treatment options. She is committed to patient education and contributed to a pelvic pain guide for patients.

Boston magazine Top Doctors™
Recognized in Pain Medicine for 2025 and 2026.

Tamra Brennan

Certified Nurse Practitioner

Tamra brings experience in medical-surgical nursing, cardiology, and intensive care to her work in pain management. She earned her nursing degree at the University of Massachusetts Amherst, graduating with honors and membership in Sigma Theta Tau International.

While working at Lahey Hospital and Medical Center, she completed a Master of Science in Nursing at the University of Massachusetts Worcester, following the Adult/Gerontological Acute Care track with a specialization in Cardiovascular Medicine.

Tamra specializes in medication management, joint injections, and Botox injections. She also encourages physical therapy and exercise as part of a comprehensive approach to health and wellness.

Alex Bente

Certified Physician Assistant

Alex earned a bachelor’s degree in neuroscience from Scripps College and graduated from the University of Southern California’s physician assistant program in 2010.

Her background includes gynecology, maternal-fetal medicine, and clinical technology. Her own experience receiving care for headaches and neck pain inspired her interest in pain management and helping others find relief.

Her clinical interests include medication management, Botox for chronic migraines, trigger point injections, and intrathecal pump management. She is a member of the American Academy of Physician Assistants and the American Society of Regional Anesthesia and Pain Medicine.

Libby

Certified Therapy Dog

Libby volunteers alongside our providers, bringing comfort and joy to patients and staff. Certified in 2016, she began her work alongside our original therapy dog, Loki.

She loves ear scratches, rolling in the grass outside the clinic, and catching up with visitors.