Mark M. Theiss, MD
Inova Medical Group
Specialty: Orthopaedic Sports Medicine, Orthopaedic Surgery
Clinical Interest: Shoulder Problems/Surgery and Treat, Knee Problems/Surgery and Treatment, Knee Replacement, Hip Replacement
Accepting new patients for: Orthopaedic Sports Medicine
Languages: English, Tagalog (Filipino)
Inova Medical Group - Orthopedics and Sports Medicine II
Dr. Mark Theiss is a specialty care physician board certified in orthopedic surgery and sports medicine. Dr. Theiss joins Inova Medical Group with over 30 years of clinical experience. He has a special interest in shoulder, knee, and hip replacement coupled with a passion for sports medicine.
For the past 13 years to present, Dr. Theiss has served as a Chairman for the Department of Orthopedic Surgery at Inova Fairfax Hospital. He is also a Clinical Associate Professor with the Department of Orthopedic Surgery at Georgetown University Medical Center and at the VCU School of Medicine at the Inova Campus.
Dr. Theiss became interested in orthopedic surgery when participating in sports during his youth. After witnessing sports injuries, he took a keen interest in the medical process and helping his teammates recover so they could return to sports. That passion continues today. He enjoys assisting patients of all ages with the return to an active lifestyle, regardless of athletic ability or age.
Dr. Theiss grew up in San Francisco and currently resides in Fairfax, VA with his wife who he coaches during marathon and duathlon training. He is an avid distance cyclist, skier and fisherman.
Medical Education: Georgetown University School of Medicine 1975
Board Certification: Orthopaedic Sports Medicine, Orthopaedic Surgery
Residency: Georgetown University - DC 1980
Internship: St Barnabas Medical Center, NJ 1976
Areas of Interest
Shoulder Problems/Surgery and Treat
Knee Problems/Surgery and Treatment