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Orthopedic Surgery

Talk to our joint care experts.

If you're suffering from joint pain, take action. Call us at (209) 564-3700 to schedule an appointment. Or use our Find a Doctor tool to locate an orthopedic expert near you. 


Orthopedic Surgery

At Dignity Health Medical Group - Merced, our highly trained team delivers comprehensive care for injuries and diseases affecting the bones, joints, ligaments, tendons, muscles and nerves. From diagnosis to treatment and rehabilitation, our orthopedic surgeon works in concert with other specialists to restore a patient's strength, flexibility and function. Integration with our rehabilitation specialists helps deliver smooth transition from surgery to recovery, resulting in lower complications rates, more successful outcomes and shorter stays in a hospital setting for the majority of our patients.  


Meet Ray DeLorenzi, MD

Dr. Ray DeLorenzi is a board-certified orthopedic surgeon who goes the extra mile to help you get back to doing what you love as quickly as possible. Dr. DeLorenzi will be with you all the way—from the first consultation to your post-op visit.

Advanced Treatment

With expert guidance on diet, exercise, medication and orthopedic surgery options, our orthopedic doctors can give you long-lasting solutions to your aches and pains. Dignity Health Medical Group - Merced’s orthopedic physician offers:

  • Reconstruction procedures
  • Hip replacement surgery
  • Knee replacement surgery
  • Shoulder surgery
  • Surgical and nonsurgical care of fractures
  • Sports medicine

Surgical Techniques

ACL reconstruction is one of the most common knee surgeries. “ACL” stands for anterior cruciate ligament. It connects your thighbone to your shinbone with a twist in the middle and helps stabilize your knee. Most injuries happen during sports and activities in which sudden stopping, pivoting or landing causes the ACL to tear.

With ACL reconstruction, a surgeon replaces the damaged ACL with another piece of similar tissue, typically taken from another part of the patient’s knee or thigh. Surgeons make a small incision in the front of the knee, usually less than a centimeter, and inserts an arthroscope, which is a thin tube attached to a video camera. This allows doctors to see inside the knee while surgery is underway. There are newer techniques that have been developed over the last 10 years that allow surgeons to better reconstruct the ACL in a more “anatomic” fashion, including anteromedial portal drilling. This better restores the natural anatomy and is why it’s important to see a sports-fellowship trained surgeon.

Through the anterior approach to hip replacement, the hip joint is accessed from the front of the hip rather than from the side or back of the hip. The benefits of anterior hip replacement include: 

• Shorter time in surgery

• Decreased hospital stay

• Shortened recovery time

• Reduced post-operative pain

• Less scarring

• Rapid return to normal activities

• Full weight-bearing after surgery

• A natural fit for long-term success

The last several decades have seen significant advances in arthroscopic surgery, a minimally invasive technique used to diagnose and treat joint problems. Dignity Health Medical Group - Merced's orthopedic surgeon repairs and reconstructs joints using highly specialized instruments inserted through small incisions about half an inch long. Arthroscopic surgical procedures are used to lessen pain, reduce recovery time and allow a patient to regain the full use of the joint. Some arthroscopic procedures are also used in conjunction with open procedures to make the overall procedure less invasive.

For those suffering from moderate or advanced arthritis, joint replacement surgery restores freedom of movement and brings dramatic pain relief. These procedures require an orthopedic surgeon to remove the arthritic or damaged joint and replace it with an artificial composite usually made of titanium, surgical steel and polyethylene—a high-density plastic that is strong, durable and smooth. After recovery, patients are usually able to walk and resume their prior level of daily activities without pain or stiffness.


Call for an appointment: (209) 564-3700

If joint pain is keeping you from the activities you love, find relief. Call us at (209) 564-3700 and let one of our care coordinators schedule an appointment with our orthopedic expert.

Common Conditions


As a person ages, particularly from 40 years onwards, there is an increasing chance they will develop pain in the joints. According to the Arthritis Foundation, 46 million Americans (one in five adults) are affected by the disease. In some cases, arthritis can become so severe that sufferers cannot walk comfortably, climb stairs or participate in everyday activities. Osteoarthritis is the most common form of arthritis and also the most common cause of joint pain. It is a progressive condition involving the breakdown of the joint’s cartilage. Rheumatoid arthritis differs from osteoarthritis in that it is not from overuse but rather a disorder in which the immune system attacks the healthy tissue that lines the joints, causing chronic inflammation, pain and loss of function.


Knee pain is by far the most common orthopedic complaint, and technology is always enhancing the capabilities of orthopedic medicine to treat it. Recent advancements in imaging and mapping are providing ever greater results and shorter recover times. Dignity Health Medical Group - Merced is proud to offer cutting edge procedures to address arthritis including knee replacement, knee resurfacing and arthroscopic surgery.

Tearing of the anterior cruciate ligament (ACL) is a common sports injury and will cause the knee to feel loose and unstable, especially with turning or pivoting motions. Partial tears of the ACL may heal on their own, but complete tears usually require surgical reconstruction in which a strip of patellar tendon or hamstring muscle is used as a graft and a new ACL is constructed. When a systematic rehabilitation and exercise program is followed after surgery, most patients recover full range of motion and ability to participate in vigorous daily activities, including sports.


Hip arthritis can make walking even short distances painful and disabling. At Dignity Health Medical Group - Merced, we pride ourselves on using the latest innovations in equipment and surgical techniques for the relief of hip pain and dysfunction. Surgical options include minimally invasive hip arthroscopy where painful bone spurs and loose cartilage can be removed. We also perform total hip resurfacing and hip replacements, offering both anterior and posterior approaches. Coupled with guided physical therapy, you can get back to walking pain-free in a relatively short recovery time.


Hands and wrists are prone to injury due to repetitive motions, sports-related injuries, arthritis and trauma. Once the condition is accurately diagnosed, our doctors provide treatment options beginning with the least invasive approach possible. Dignity Health Medical Group - Merced offers surgical care for both chronic and acute problems of the hand, including endoscopic carpal tunnel release surgery.


With age and overuse, a shoulder joint may develop arthritis similar to a knee or hip joint. Shoulder arthritis is the loss of cartilage from the two bones that create the joint: the ball (humerus) and the cup (glenoid). Advances in surgical techniques have made shoulder replacement a great option to relieve pain and restore function.


The foot is one of the most complex parts of the body, consisting of 26 bones and numerous joints, muscles, tendons and ligaments. All of these parts are susceptible to pain, inflammation and injury. The most common foot problem is heel pain, also known as plantar fasciitis. Left untreated, this painful condition can result in bone spurs which may need to be surgically removed. Other common foot problems include bunions, hammertoes and ankle sprains. Recurrent ankle sprains can damage ligaments and tendons, causing instability and predisposing one to the formation of arthritis.

Location and Hours

Dignity Health Medical Group - Merced (multi-specialty)