Orthopaedic Surgical Associates

02/24/2026

Here is an example of the expertise and care that makes Orthopaedic Surgical Associates stand out.

Dr. Howard Wu is a fellowship-trained orthopedic surgeon specializing in sports medicine, trauma, and joint reconstruction and replacement of the shoulder, knee, and hip. He has expertise in advanced, minimally invasive arthroscopic techniques, and treats arthritis, general orthopedic injuries, and all injuries related to sports medicine.

Learn more about Dr. Wu: https://orthsurg.com/physicians/howard-wu/

02/22/2026

Due to inclement weather, all offices will be closed on Monday, February 23.

02/13/2026

OSA and Therafit offices will be closed on Monday, 2/16 in observance of Presidents’ Day. Chelmsford imaging will be open.

02/11/2026

Here is an example of the expertise and care that makes Orthopaedic Surgical Associates stand out.

Dr. Jeremy Moses is a fellowship-trained orthopedic surgeon specializing in sports medicine. He cares for patients of all ages and athletic backgrounds. Dr. Moses has expertise in advanced arthroscopic techniques of the knee and shoulder and treats a breadth of orthopedic injuries and conditions to get patients back to their active lifestyles.

Learn more about Dr. Moses: https://orthsurg.com/physicians/jeremy-m-moses/

02/03/2026

On Women Physicians Day, we are proud to spotlight the women physicians at OSA whose expertise, leadership, and dedication make a lasting impact on our community. Join us in recognizing:

Dr. Elisabeth R. Gennis
Dr. Allis Kim

02/02/2026

This Black History Month, we celebrate the lasting contributions of Black leaders in medicine. We are proud to honor their legacy and remain committed to advancing equality and inclusion in patient care.

01/30/2026

Here is an example of the expertise and care that makes Orthopaedic Surgical Associates stand out.

Dr. Steven DiSegna is a fellowship-trained orthopedic surgeon who specializes in the diagnosis and treatment of hip and knee arthritis, general joint pain and problems with prior joint replacements. He regularly performs primary and revision hip and knee replacements, partial knee replacements, minimally invasive anterior approach total hip replacement, robotic surgery and outpatient total joint replacements.

Learn more about Dr. DiSegna: https://orthsurg.com/physicians/steven-t-disegna/

Steven DiSegna, MD, is a fellowship-trained orthopedic surgeon who specializes in the diagnosis and treatment of hip and knee arthritis, general joint pain and problems after prior joint replacements. He regularly performs primary and revision hip and knee replacements, partial knee replacements, mi...

01/23/2026

Due to inclement weather, all offices will open at 1:00 pm on Monday, January 26, except Chelmsford Imaging, which will open at 10:00 am.

01/21/2026

Orthopaedic Surgical Associates is proud to announce that 10 of our physicians have been named Castle Connolly Top Doctors, placing them among the top 7% of practicing physicians in the country.

Please join us in congratulating our exceptional team of doctors. Learn more and see the full list of doctors recognized: https://ow.ly/KwrS50Y0QeQ

Orthopaedic Surgical Associates (OSA) is proud to announce that 10 of our physicians have been recognized on this year’s Castle Connolly 2026 Top Doctors and Rising Stars list.

01/19/2026

Today, we honor and reflect on Dr. Martin Luther King Jr.’s vision of freedom and equality for all.

Please note that OSA physician offices will be closed today in observance of the holiday. Imaging services at our North Chelmsford location are open as usual.

12/30/2025

Wishing you a happy and healthy New Year! We look forward to seeing you in 2026. Please see our holiday hours:

1/1/26:
- All locations closed

12/29/2025

With recent headlines in professional football bringing renewed attention to ACL injuries, conversations around treatment, recovery, and return-to-sport are more prevalent than ever.

Dr. Scott Sigman, sports medicine surgeon at OSA emphasizes how ACL care has evolved into a highly personalized process, where individualized rehab and functional benchmarks now play a key role in preparing athletes to return to sport.

Learn more about Dr. Sigman: https://ow.ly/VZS750XNPYr