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The Center for Orthopedic Care at Oswego Health will offer personalized care in joint replacement, fracture trauma and sports medicine!

Experienced orthopedic surgeons, Michael Diaz and Greg Keller have joined Dr. John Ayres to offer local orthopedic services that our community and patients deserve. An orthopedic team that listens and spends time with its patients with offices located in Oswego and Fulton.

Our orthopedic team offers office visits in suite 280 of the Health Services Center, adjacent to Oswego Hospital at 140 W. Sixth St. They also perform a range of surgeries, including total joint replacements, in Oswego Hospital’s advanced Surgery Center.

We provide:

  • True sports medicine services that assist local athletes and weekend warriors return to the field or gym.
  • Complete joint replacement surgery with all pre and post-surgery appointments held locally
  • Advanced fracture care in Oswego Hospital's Emergency Department
  • 24/7 orthopedic coverage in Oswego Hospital's Emergency Department and Urgent Care Centers.
  • An orthopedic team that listens and spends time with its patients
  • A state-of-the-art surgery center that features advanced technology.
  • A caring nursing staff that will care for you while you recover in Oswego Hospital.
  • A complete rehabilitation department that can provide physical, occupation and speech therapy services on an outpatient basis, in your home or as a rehabilitation patient at the Manor at Seneca Hill. Our highly-trained staff is well-versed on techniques and procedures that lead to a speedy recovery.
  • A team of healthcare providers that work together to get you back to your life quickly


Hand & Upper Extremities

Oswego Health will provide care that meets the standard of excellence in care for your hand and upper extremity needs.

Conditions treated include:

  • Arthroscopy of the elbow, wrist and finger
  • Carpal Tunnel Syndrome and other nerve compression injuries
  • Elbow, wrist and finger reconstruction and replacement
  • Minimally Invasive Surgery of the Upper Extremity
  • Sports injuries to the elbow, wrist and hand

Joint Replacement

Oswego Health provides a team of surgeons in total joint replacement. During the surgery, diseased or injured joint surfaces are removed and replaced with an artificial joint, or prosthesis, generally made from metal and plastic or ceramic materials designed to allow the artificial joint to move much like a normal joint.

Hip Replacement & Hip Replacement Surgery

  • Hip Replacement
  • Minimally Invasive Hip Replacement
  • Hip Resurfacing
  • Revision Hip Replacement Surgery
  • Anterior Approach Total Hip Replacement

Knee Replacement

  • Minimally Invasive Knee Replacement
  • Computer Assisted Knee Replacement
  • Revision Knee Replacement Surgery
  • Partial Knee Replacement
  • Unicompartmental Knee Replacement

Other Joint Replacement Options

  • Treatment of Hip and Knee Disorders in Young Adults
  • Adult Joint Reconstruction

Sports Medicine

Oswego Health physicians will provide orthopedic care for athletes of all levels – professional, collegiate, high school and recreational.  We provide a total care approach, including prevention, diagnosis and injury management.  

Common Sports Medicine Injuries Treated:

  • Rotator Cuff Repair
  • Repair of Torn Cartilage (meniscus) from Knee or Shoulder
  • Reconstruction for an ACL Tear
  • Removal of Inflamed Lining (synovium) in Shoulder, Elbow, Wrist, Knee and Ankle
  • Torn Ligament Repair
  • Removal of Loose Bone or Cartilage in Shoulder, Elbow, Wrist, Knee and Ankle

Foot & Ankle

We will provide orthopedic care for any of your foot or ankle health concerns. We can offer patients services for routine foot care, like an ankle fracture or heel spurs to major surgical procedures such as an ankle replacement.


  • Ankle Replacements
  • Ankle fractures, strains, sprains and instability
  • Bunions
  • Hammer Toe
  • Rheumatoid arthritis
  • Achilles tendon tears or ruptures
  • Overuse injuries


  • Splinting, bracing or casting
  • Non-steroidal anti-inflammatory drugs or cortisone injections
  • Foot taping or padding
  • Physical therapy
  • Customized orthotics, lower extremity bracing and diabetic shoes


  • Splinting, bracing and casting
  • Non-steroidal anti-inflammatory drugs or cortisone injections
  • Foot taping or padding


John Ayres, MD

undefinedDr. Ayres earned his doctor of medicine degree from New York Medical College in New York City. He completed his surgical internship at Dartmouth’s Mary Hitchcock Hospital in Hanover, N.H., and his orthopedic surgical residency at the Mayo Clinic in Rochester, MN. He is a board certified orthopedic surgeon with more than 30 years of orthopedic experience.

Michael Diaz, DO

Dr. Diaz has been practicing orthopedic care for the past 20 years at Bassett Healthcare’s Oneonta Surgeons and Specialists office. He also provided care at various other Bassett Healthcare locations. He earned his Doctor of Osteopathic Medicine, from the Philadelphia College of Osteopathic Medicine, where he also completed his orthopedic surgery residency and internship. While at Bassett, Dr. Diaz performed some 250 joint replacement surgeries every year. Along with performing surgeries, he serves as a clinical assistant professor of orthopedic surgery at both Upstate Medical University and the Columbia University Medical Center.

Greg S. Keller, MD

Dr. Keller specializes in shoulder and elbow surgery, knee replacements and sports medicine care. He also provides fracture trauma care of the upper and lower extremities.

He earned his medical degree from Pennsylvania State University Hershey Medical Center and completed his residency training at the Albany Medical Center. Dr. Keller’s sports medicine fellowship was fulfilled at the Institute for Bone and Joint Disorders, while his shoulder fellowship was completed at Maricopa Medical Center, in Arizona. 

Rahul Shinde, PA

undefinedRahul Shinde earned his physician assistant degree from Upstate Medical Center last year, graduating with high honors.  He previously earned his bachelor of medicine bachelor of surgery from NDMVPS Medical College in Nasik, India. He completed his Internship at Nasik Civil Hospital, also in India.

August R. Buerkle, Jr. MD


August R. Buerkle, Jr
Orthopedic Surgeon

522 S. 4th Street
Suite 1400
Fulton, NY 13069
Phone: 315.457.4400

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