In observance of the holiday, all OSA locations will be closed on Thursday, 11/27. On Friday, 11/28, all locations will be closed except for Chelmsford Imaging, which will be open with regular business hours on Friday, 11/28 and Saturday, 11/29.

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Please note: Orthopaedic Surgical Associates (OSA) requires payment of outstanding balances at the time of check-in for your appointment. Thank you.

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Frequenty Asked Questions on Common Spine Conditions

Degenerative Disc Disease (DDD) What is degenerative disc disease? Degenerative disc disease is the natural wear-and-tear of spinal discs. Despite being a part of normal aging, this wear and tear can be painful. What are the symptoms? People typically experience chronic back or neck pain which may worsen when sitting, bending or lifting. How is […]

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9 OSA Physicians Are Named Castle Connolly 2025 Top Doctors

Orthopaedic Surgical Associates is proud to have 9 Castle Connolly 2025 Top Doctors. These notable doctors are nominated by their peers and thoroughly validated by Castle Connolly’s research team to ensure that they deliver the highest quality patient care. The doctors selected have been determined to embody excellence in clinical care as well as interpersonal […]

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Innovations in Spine Surgery: AI Personalized Implants for Fusions

Back pain is one of the most common reasons that people seek a physician’s care. Depending on the cause and severity, there are several pain relief treatments available ranging from conservative to surgical. When appropriate, conservative treatments can include anti-inflammatory medications, physical therapy and/or injections. One surgical option for back and/or leg pain is a […]

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Understanding Scoliosis

What is scoliosis Scoliosis is an abnormal side-to-side curvature of the spine. When looking at a person with scoliosis from the front, his or her spine may be more shaped like a “C” or a “S”. This can lead to the shoulders and/or hips being uneven. If the curve is large enough, it may cause […]

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Physician Spotlight on Dr. Mark Lapp

How did you get interested in orthopedics? I became interested in orthopedics when I was young because my grandfather was a ski patroller and aided injured skiers on the mountain. I would ride around with him and see him giving first aid to people—including things like femur and tibia fractures, and other common orthopedic injuries. […]

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