Joint Replacement Surgery

The joint replacement surgeons at Orthopedics Northwest in Yakima have years of experience in joint replacement including shoulder, hip and knee joint replacement surgery and are committed to restoring you to maximum function so you can return to the quality of life you deserve as quickly as possible.

For information and appointments, call (509) 454-8888. (509) 454-8888.

Shyler L. DeMill, DO »

Shyler L. DeMill, DO

Dr. DeMill received his undergraduate degree from Brigham Young University and his medical degree at the Arizona College of Osteopathic Medicine in Glendale, AZ. He completed a five-year residency program in Orthopedic Surgery at Doctor's Hospital and Grant Medical Center in Columbus, OH, through the Ohio University College of Osteopathic Medicine.

Dr. DeMill then completed a Fellowship in Foot and Ankle Surgery at the Orthopedic Foot & Ankle Center in Westerville, OH.

Dr. DeMill treats a wide array of orthopedic problems, but he has special interest in the lower extremity. His practice focuses on foot and ankle sports medicine, reconstruction, arthroplasty, and trauma.

Robert N. Greene, MD »

Robert N. Greene, MD

Dr. Greene received his undergraduate and medical degrees from McGill University in Montreal, Quebec, Canada. His comprehensive surgical internship was completed at Mt. Sinai Hospital in Toronto, Canada.

Dr. Greene then completed his four-year orthopedic residency at the University of Ottawa in Ottawa, Ontario, followed by two years of fellowship subspecialty training for sports medicine and hip and knee replacement surgery. He is Canadian and American Board Certified and a Fellow of the Royal College of Surgeons of Canada and the American Academy of Orthopedic Surgeons.

Dr. Greene has a general orthopedic practice with an emphasis on hip and knee replacement.

Gene L. Griffiths, MD

Gene L. Griffiths, MD

Dr. Griffiths received his undergraduate degree from Brigham Young University and his medical degree from St. Louis University School of Medicine. He completed an internship and residency in Orthopedic Surgery at Tripler Army Medical Center in Honolulu, HI. He also served as a General Medical Officer at Camp Zama, Japan for the U.S. Army.

Dr. Griffiths was employed as an Orthopedic Surgeon at Martin Army Community Hospital, Fort Benning, GA, and at Summit Orthopaedics, Idaho Falls, ID. In addition, he was employed as a General Orthopedist at Central Washington Orthopaedics, Yakima, WA.

Dr. Griffiths is a Diplomate of the American Board of Orthopaedic Surgery. His practice is in general orthopedics, with an emphasis on trauma, sports medicine, and adult reconstructive surgery.

John J. Hwang, MD »

John J. Hwang, MD

Dr. Hwang received his undergraduate degree in Biochemistry from Rutgers University in New Brunswick, NJ, and his medical degree from the Johns Hopkins University School of Medicine in Baltimore, MD. He completed his General Surgery internship and Orthopaedic Surgery residency at the Johns Hopkins Hospital.

Dr. Hwang then completed a Hand Surgery Fellowship program at Barnes-Jewish Hospital in St. Louis.

Dr. Hwang is Board Certified in Orthopaedic Surgery and has a Certificate of Added Qualification in Hand Surgery. He is a Fellow of the American Academy of Orthopaedic Surgeons and of the American Society for Surgery of the Hand. He has an orthopedic practice with an emphasis on hand, wrist, elbow, shoulder problems, arthroscopic surgical treatment for upper extremity problems, and shoulder replacement.

Thomas C. Kennedy, MD

Thomas C. Kennedy, MD

Dr. Kennedy was born and raised in Yakima. He received his undergraduate degree from Stanford University and his medical degree from Washington University. He completed a two-year General Surgery internship followed by four years of Orthopaedic Residency at the University of Minnesota where he also held the position of Assistant Professor in the Sports Medicine section of the Department of Orthopaedic Surgery before deciding to return to Yakima.

He is Board Certified in Orthopaedic Surgery and has a Subspecialty Certificate in Sports Medicine. He is a Fellow of the American Academy of Orthopaedic Surgeons.

Dr. Kennedy specializes in Orthopaedic Sports Medicine, the evaluation and treatment of athletic injuries and conditions of the knee and shoulder including arthroscopic surgery. He also treats arthritic conditions of the knee including performing partial and total knee replacement surgeries.

George S. Liu, MD

George S. Liu, MD

Dr. Liu received his undergraduate degree from Tulane University School of Engineering in New Orleans and his medical degree from Harvard School of Medicine in Boston. He worked as a Postdoctoral Research Fellow at the Harvard Orthopedic Biomechanics Laboratory and then completed the Combined Orthopedic Residency Program at Harvard University. He also served as Chief Resident at The Children's Hospital in Boston.

Dr. Liu is American and Canadian Board Certified and holds active fellowship in the American College of Surgeons, the Royal College of Physicians and Surgeons of Canada, and the American Academy of Orthopedic Surgeons. He served as the Chairman of the Department of Orthopedic Surgery at Yakima Valley Memorial Hospital for 4 consecutive terms and as Chief of Staff at Virginia Mason Memorial Hospital for 2 consecutive terms. He is the current Vice Chair of the Department of Orthopedic Surgery and Medical Staff Officer/Past President at Virginia Mason Memorial Hospital.

Dr. Liu is a general orthopedic surgeon with special interest in shoulder and knee arthroscopic surgery, hip and knee replacement surgery, fracture and trauma surgery, and hand surgery. Dr. Liu emphasizes comprehensive musculoskeletal care for his patients and their families, and also treats various pediatric orthopedic conditions.

Anthony J. Longo, MD

Anthony J. Longo, MD

Dr. Longo received his undergraduate degree in Molecular Biology from the University of Texas at Austin, and his medical degree from the University of Texas Medical Branch at Galveston. He completed his Orthopaedic Residency at the University of Texas Medical Branch in Galveston, Texas.

Dr. Longo has been in practice as an Orthopedic Surgeon in central Washington since 2007.

Dr. Longo is Board Certified by the American Board of Orthopaedic Surgeons. He is a member of the American Academy of Orthopaedic Surgeons and the American Medical Association. He is in practice as a general orthopedic surgeon with an emphasis on sports and total joint replacement of the knee and hip.

Todd B. Orvald, MD

Todd B. Orvald, MD

Dr. Orvald received his undergraduate degree from Duke University in Durham, NC, and his medical degree from Jefferson Medical College in Philadelphia, PA. He completed a surgical internship as well as residencies in General Surgery and Orthopaedic Surgery at Duke University Medical Center. He also completed Pediatric Orthopaedic and Orthopaedic Pathology Fellowships at Duke University Medical Center. He has also served in the United States Army Medical Corps.

Dr. Orvald is Board Certified in Orthopaedic Surgery and is a Fellow of the American Academy of Orthopaedic Surgeons.

Dr. Orvald has a general orthopedic practice with an emphasis on joint replacement surgery.

Richard D. Roux, MD »

Richard D. Roux, MD

Dr. Roux received his undergraduate and Master's degrees from Stanford University in Palo Alto and his medical degree from the University of California at San Diego. He completed the Orthopaedic Residency Program at Harvard University and a Fellowship in Sports Medicine and Arthroscopy at Massachusetts General Hospital/Harvard University. He also completed orthopedic biomechanics research fellowships at UCSD and Beth Israel Hospital/Harvard University.

Dr. Roux is Board Certified in Orthopedic Surgery and holds a Certificate of Added Qualification in Sports Medicine. He is a Fellow of the American Academy of Orthopedic Surgeons and the American College of Sports Medicine. He is the Chief Orthopedic Team Physician for the Central Washington University athletic teams.

Dr. Roux is an orthopedic surgeon who specializes in Sports Medicine, arthroscopic surgery, and treatment of disorders of the knee and shoulder. His treatment goal is to restore maximum function through comprehensive treatment utilizing minimally invasive surgical techniques.

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