Founded in 1994 by Dr. Lawrence D. Dorr, Operation Walk surgeons, nurses and health professionals have operated on more than 3,000 patients in Russia, Cuba, Nepal, China, the Philippines, Nicaragua, Panama, Mexico, El Salvador, India, Ecuador, Peru and the United States.

Operation Walk Maryland was established in 2007 by Harpal S. Khanuja, MD and Maria Khanuja, CRNP and is supported by a dedicated team of colleagues and volunteers.

The mission of Operation Walk Maryland is to improve the quality of life of disadvantaged patients around the world suffering from joint diseases. Operation Walk Maryland uses the best-trained and skilled health care providers to delivery the highest level of care that we have in the United States. There is no cost to the patient or community that we serve. All time and supplies are provided through donations. Knee and hip replacements are among the most cost-effective medical procedures. They greatly enhance the quality of life of those suffering with arthritic pain, so they can be more active members of their community.


Dr. Harpal S. KhanujaDr. Harpal S. Khanuja (Paul)

Dr. Khanuja is the Chief of Adult Reconstruction of Hip and Knee Replacement Surgery at the department of Orthopaedic Surgery for Johns Hopkins University, School of Medicine in Baltimore, Maryland. He is fellowship trained in hip and knee replacement surgery. Dr. Khanuja first met Dr. Larry Dorr while he was participating in The Knee Society’s John N. Insall Traveling Fellowship in 2006. As a result, Dr. Khanuja and his wife Maria went on their first Operation Walk trip to El Salvador in 2007. After this experience he and Maria decided to establish the Maryland Chapter of Operation Walk. For more information on Dr. Khanuja please visit his web site at

Maria Khanuja, CRNP

Maria is an adult nurse practitioner of internal medicine and works as the logistics coordinator for Operation Walk Maryland. After her first Operation Walk trip she knew she wanted to devote her time to this cause. This was inspired by the appreciation expressed by the patients and the knowledge that they had given an opportunity to people who otherwise would never have one. She would like to thank her family, particularly her in-laws who take care of her three children while she is traveling each year on these medical trips.


  • Dr. Gurminder S. AhujaGurminder Ahuja, MD
    Dr. Ahuja, is the Chief of Orthopedic Surgery and Chief of Surgical Specialties for Kaiser Permanente in the Baltimore region. With residency training from the University of Illinois, he completed his fellowship training in Sports Medicine in Lexington, KY. His practice consists of sports reconstructive surgery and total joint replacements. Monty started with Operation Walk at request of Paul and Maria Khanuja. There dedication to this cause was transparent. He is blessed with a wonderful wife, Jassi, and three lovely children, Raveena, Gurleen, and Aneel.
  • Peggy Bessent
  • Gurpal Bhuller, MD
  • Pam Himmelrich
  • Brendan Kelly
  • Harpal S. Khanuja, MD
  • Maria Khanuja, CRNP
  • Emily Woods


  • Gurminder S. Ahuja, MD
  • Harpal S. Khanuja, MD
  • Maria Khanuja, CRNP
  • Dorothy Czajkowski, CRNP
  • Shruti Thomas, MSN, RN


  • Erin Baker, MPT, PT
  • Dotsie Czajkowski, CRNP
  • Daljeet Saluja, MD
  • Shruti Thomas, RN