MedStar St. Mary’s Hospital is part of the MedStar Orthopaedic Institute, the area’s largest and most experienced team of orthopedic surgeons.

As a leader in the diagnosis and treatment of a wide range of orthopedic conditions, we combine the experience and expertise of our fellowship-trained orthopedic surgeons to customize the right solution for you. No matter how simple or complex your orthopedic condition, our team has the expertise to help restore your quality of life.

We set high expectations for your recovery and tackle challenges to restore your function and range of motion. Our goal is to get you back to your favorite activities—whether that’s walking, playing a beloved sport, or keeping up with your grandchildren.

Orthopedic Specialties:

Patient Resources:

Our Specialists


MedStar St. Mary’s Hospital
William C. Lennen, MD
Joint Replacement (Hip & Knee)
PhonePhone: 240-434-7483

MedStar St. Mary’s Hospital

Orthopedic Specialties