Made for more freedom

You were made for more. More adventure. More time exploring the great outdoors.

You shouldn’t have to give up the activities you love most because chronic joint pain is slowing you down. The Coon Joint Replacement Institute (CJRI) offers the most advanced technology, which means faster recovery time and long-term success, so you can wake up ready to take on your next challenge.

Find out your risk for joint damage

If you are giving up important daily activities or missing out on hobbies you enjoy because of knee or hip pain, it's time to take the first step to better joint health! Our risk assessment takes just 5-7 minutes to complete. At the end you will receive a free, personalized risk assessment report.

What Makes Us Right for You

Award-winning care, advanced procedures and outstanding patient outcomes

Join the more than 20,000 CJRI patients who have overcome chronic joint pain. Patients choose us for joint replacement surgery because our award-winning surgeons are leaders in their field. Most recently, U.S. News and World Report named Adventist Health St. Helena among the best hospitals in 2023-2024 for hip and knee surgery.

Knee Surgery

If non-surgical interventions have failed to free you from pain, knee replacement surgery might be the next step in your journey towards health. Our team are experts in the field and will work with you to determine the best surgical options for you.

At the Coon Joint Replacement Institute surgeons were among the first to use the Mako surgical robotic arm to perform MAKOplasty®, which is a technique that resurfaces the damaged area without compromising the healthy bone and tissue surrounding it.

The Coon Joint Replacement Institute is now at the forefront of the MAKOplasty® Total Knee. Our institute is one of the first to perform this surgery in the United States. This level of expertise and advanced technology means that after surgery you will be back on your feet faster, enjoying the activities you love most.  

The Institute has earned the Joint Commission Gold Seal of Approval™ for Knee Replacement and the Joint Commission Gold Seal of Approval™ Advanced Certification for Total Knee and Hip Replacement. We are also registered as a Blue Distinction Center+® from Blue Shield of California and an Aetna Institutes Of Quality® (10Q) Total Joint Replacement Program.

Hip Surgery

If non-surgical interventions have failed to free you from pain, hip replacement surgery might be the next step in your journey towards health. Our team are experts in the field and will work with you to determine the best surgical options for you.

The Coon Joint Replacement Institute is one of the highest volume centers north of San Francisco performing the direct anterior approach (DAA) for hip replacement, a minimally invasive technique that requires a 3-4 inch incision located at the front of the hip, as compared to the 8-12 inch incision used with a more traditional approach. More importantly, the direct anterior approach does not require detaching any of the muscles or tendons, which ultimately results in better outcomes, more accuracy and a quicker recovery for the patient.

The Institute has earned the Joint Commission Gold Seal of Approval™ Advanced Certification for Total Knee and Hip Replacement. We are also registered as a Blue Distinction Center+® from Blue Shield of California and an Aetna Institutes Of Quality® (10Q) Total Joint Replacement Program.

Joint Pain Treatment

Take the first step to a more active tomorrow

Meet Our Surgeons

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John Diana, MD

Orthopedic Surgeon

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Ryan Moore, MD, PhD

Orthopedic Surgeon

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Michael Caravelli, MD

Orthopedic Surgeon

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On-Demand Webinar

Sign up for our free hip and knee replacement on-demand webinar

For patients suffering from osteoarthritis and other conditions, our award-winning surgical team performs hip and knee joint replacement surgery using state-of-the-art minimally invasive techniques, including computer-assisted navigation, robotic-assisted partial and total knee replacement and robotic-assisted hip replacement.

Our Location

Coon Joint Replacement Institute

(877) 747-9991

6 Woodland Road, Suite 202
St. Helena, CA 94574

Monday 8 a.m. - 5 p.m.
Tuesday 8 a.m. - 5 p.m.
Wednesday 8 a.m. - 5 p.m.
Thursday 8 a.m. - 5 p.m.
Friday 8 a.m. - 5 p.m.

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Adventist Health St. Helena

Learn more about hip and knee replacement surgery

Fill out this form and one of our caring representatives will follow up with you and help you take the next step towards living a full and healthy life. By providing your details, you agree to receive communications such as annual appointment reminders, health education materials, event information and other notifications from Adventist Health.

Fill out this form and one of our caring representatives will follow up with you and help you take the next step towards living a full and healthy life. By providing your details, you agree to receive communications such as annual appointment reminders, health education materials, event information and other notifications from Adventist Health.