Services We Offer

The hip and knee joints are the largest joints in your body, helping you perform most of your necessary daily movements, including walking, balancing, and running. When your hip or knee is damaged due to arthritis, injury, or another condition, your quality of life can suffer tremendously.

At MedStar Orthopaedic Institute, we provide care for all hip and knee conditions, from non-operative to operative care, including complex joint revisions. Our team of orthopedic specialists have years of training and experience in joint care and offer the least invasive total hip replacement surgery and total knee replacement possible. Our team is dedicated to helping you get back to your normal life quickly and safely.

Our orthopedic hip and knee doctors are:

  • Specially trained and experienced in hip and knee replacement surgery
  • Able to provide access to multidisciplinary care centers all under one roof
  • Experienced surgeons who use innovative technologies, including robotic-assisted techniques and computer navigation, which provide a more precise and safe procedure
  • Specialists in minimally invasive surgical procedures, including direct anterior total hip replacement and mini posterior total hip replacement, which result in less pain and a quicker recovery from surgery
  • Advancing the field of orthopedics by taking part in nation-wide training programs and researching the latest techniques
  • Able to provide you with access to a sophisticated hip and knee surgery recovery program to ensure you have the best possible outcome

MedStar Orthopaedic Institute is a multidisciplinary network and home to leaders in a wide range of specialties. Our staff routinely coordinates continuing care with other specialists within our network on behalf of our patients through our Patient Care Coordination (PaCC) program. Each patient who undergoes a hip or knee replacement is assigned to PaCC coordinator who will provide all of your specific needs, based on recommendations from your surgeon. Your PaCC coordinator will organize:

  • Access to patient and family educational resources
  • Safe discharge plans from the hospital, ensuring that all medical needs are fulfilled
  • Management of transitions to each level of care needed after hospital stay


No matter how complex your hip or knee condition, you can feel confident that our team has the skills and experience to find a solution that will help you. Contact MedStar Orthopaedic Institute at 202-295-0511 to meet with an orthopedic specialist.

Our Specialists

Brian George Evans, MD
Brian George Evans, MD
Joint Replacement (Hip & Knee)

MedStar Georgetown University Hospital
MedStar Orthopaedic Institute – McLean
William C. Lennen, MD
William C. Lennen, MD
Joint Replacement (Hip & Knee)
PhonePhone: 240-434-7483

MedStar St. Mary’s Hospital
Ahamefula E. Onyike, MD
Ahamefula E. Onyike, MD
Joint Replacement (Hip & Knee)

MedStar Orthopaedic Institute – Brandywine
MedStar Orthopaedic Institute – Waldorf
MedStar Southern Maryland Hospital Center


3800 Reservoir Road Northwest Washington, DC, 20007
Phone: 202-444-8766
18109 Prince Philip Drive, Suite 325 Olney, MD, 20832
Phone: 301-774-8958
25500 Point Lookout Road, Suite 250 Leonardtown, MD, 20650
Phone: 240-434-7483
106 Irving Street Northwest, Washington, DC, 20010
Phone: 202-877-6000
1120 20th Street Northwest, Building 1 South Washington, DC, 20036
Phone: 202-416-2000
3305 North Leisure World Boulevard Silver Spring, MD, 20906
Phone: 301-774-8958
6858 Old Dominion Drive, Suite 200 Mc Lean, VA, 22101
Phone: 202-444-8766