Orthopaedic Surgical Associates

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/

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

12/22/2025

Wishing you and your loved ones a joyful holiday. Please see our holiday hours below.

Thursday, 12/25/25:
- All locations closed

Friday, 12/26/25 & Saturday, 12/27/25:
- All locations closed except Chelmsford Imaging

12/12/2025

As we enter this season of celebration, we extend our warmest wishes to all our patients, team members, and their families. Here's to a month of joy and good health!

11/26/2025

All of us at OSA wish you and your loved ones a Happy Thanksgiving filled with gratitude and good health.

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.

11/14/2025

This Nurse Practitioner Week, we celebrate the dedication and expertise of our nurse practitioners who provide exceptional care to patients at OSA every day. Thank you for all that you do!