Ronald P. Karzel, MD

Ronald P. Karzel, MD

Locations of Practice:


Practice Coordinator:  (661) 254-6364 Ext. 6573

Surgery Scheduler: (661) 254-6364 Ext. 6574

Fax: (661) 254-9076

Additional Information:

Workers' Comp: 

Fellowship-Trained Sports Medicine and Arthroscopy Surgeon

Ronald P. Karzel, MD, is originally from Wisconsin. He attended college at Yale University and subsequently graduated from Harvard Medical School in Boston.

After completing his residency training in orthopedic surgery at Northwestern University in Chicago, Dr. Karzel spent an additional year as a sports medicine and arthroscopy fellow with Southern California Orthopedic Institute. He then joined SCOI after completing his fellowship.

Dr. Karzel has been actively involved in education and research into shoulder problems. He has a particular interest in the treatment of rotator cuff and dislocation injuries in the shoulder and has helped pioneer several new techniques for the treatment of these problems. One of his inventions, the transporter device, is used to perform procedures that previously required open repairs. He has published numerous scientific journal articles and textbook chapters on subjects like knee ligament reconstruction techniques and arthroscopic shoulder surgery. Dr Karzel has also presented many scientific papers and is frequently invited to give instructional course lectures at national and international orthopedic meetings. He remains actively involved in several research projects concerning knee and shoulder injuries.

Dr. Karzel is board-certified by the American Board of Orthopaedic Surgery and is a member of the American Academy of Orthopaedic Surgeons. He was elected to membership in the American Shoulder and Elbow Society and is also a member of the Arthroscopy Association of North America, currently serving as chairman of the Communications Committee and of the American Orthopaedic Society for Sports Medicine.

Dr. Karzel is active in sports medicine on the community level, acting as the team orthopedic surgeon for College of the Canyons as well as Canyon Country, Valencia, Hart, and West Ranch High Schools in the Santa Clarita Valley.

When not at work, Dr. Karzel and his family enjoy sailing, tennis, and skiing.

Ronald P. Karzel, MD, is available to see patients in our Valencia office.


  • Sports Medicine
  • Shoulder Arthroscopy
  • Shoulder
  • Knee

"On Thanksgiving break of 2012, Dr. Karzel performed ACL replacement surgery on my then 15 year old son as a result of a football injury.

In February of 2013, just three months after surgery, Roger's physical therapist said there was nothing more he could do for him. Under the physical therapist's supoervision, Roger was doing everything on his knee with no ill effects from the injury or the surgery. When I asked the physical therapist why he was doing so well after such a catastrophic injury in such a short time, he said Roger was 15 years old and had a good surgeon.

In May of 2013, Dr. Karzel cleared Roger to play his first love, lacrosse, again. In the summer and fall of 2013, Roger competed in many lacrosse tournaments and caught the eye of many a collegiate coach that are looking at Roger for collegiate level lacrosse. I would like to thank Dr. Karzel and all the folks at SCOI for such a wonderful outcome to a catastrophic injury." -- Robert W.

"This is our third experience with SCOI. Dr. Karzel operated on my son twice, and me once. All have been very good experiences. We have recovered and are doing well.  Dr. Karzel explained everything well to us, and the follow-up went well too. I appreciated the care I received and the success of the surgery." -- Dale S.

"I never thought I would have to have shoulder surgery, but I did. Then, I thought it would take a long time recovering after surgery. It didn't. I was amazed how well I felt after two weeks, and I was able to return to work.  It has been seven-and-a-half months since I had surgery, and I am doing workouts with weights and bands to strengthen my muscles along with other cardio workouts. I am forever grateful for the expertise and caring practices of Dr. Karzel for fixing not only my shoulder but also my frayed biceps. My son also had knee surgery performed by Dr. Karzel, and we were both impressed by how well he took the time to explain exactly what happened and how he was going to fix the problem. Surgery is not so scary after all." -- Marie W.

"Both of my daughters have been treated by SCOI, and their experiences from diagnosis to surgery and then rehabilitation have been excellent; so when I started to play tennis regularly and a knee "situation" came up, of course my first thought was to come and see Dr. Karzel and his staff at SCOI. Their experience, knowledge, and welcoming attitude is the best. I recommend SCOI to anyone who asks about a reference to an orthopedist!" -- Lina G.

"Dr. Karzel is the best! After a year and a half since my shoulder surgery, I do not even remember having it unless someone asks about it. The scars are almost invisible and I am able to work out and enjoy any activity. It’s with my deepest gratitude to Dr. Karzel for my strength and well-being. His staff is also wonderful and caring. SCOI is the only place I recommend to anyone." -- Marie W.

"Dr. Karzel and his assisting physician did extensive reconstruction of my right shoulder rotator cuff.  My recovery, elimination of discomfort, and returned mobility has been outstanding. My heart felt thank yous to Dr. Karzel and all of his staff." -- Mickey B.

"I came to Southern California Orthopedic Institute for knee surgery, a torn meniscus and arthritis. I was given kind and thoughtful care for my surgery. The procedures were explained to me in detail including risk and expected benefits from the surgery. The surgery went well and the follow-up care has been fabulous. I would recommend the doctors, PAs, and friendly staff to anyone seeking orthopedic treatment. Honestly I felt like I was treated like family." -- Janet M.

"I have been a stuntwoman in the motion picture business for over 30 years.  Dr. Karzel has put me back together after injuries at work and from accumulative injuries.  I also am a Gold Card Member of the Woman's Professional Rodeo Association and run barrels and team rope at professional rodeos. I am the Woman's Professional Rodeo Association California Circuit Director and with out your sports medicine, SCOI, I would not be able to be competing at a Pro Level as a Pro Athlete at 53 years of age.  I thank you for all of your help." -- Marguerite H.

"My wife and I have used SCOI several times with great success. My wife went for foot and hand issues. I had a knee issue and both shoulders operated on by Dr. Karzel. Most recent was my left shoulder with extensive muscle and rotator cuff damage. Aside from going into great detail about what needed to be done, Dr. Karzel made certain that I understood the surgery process, start to finish, recovery, and rehabilitation. What impresses me the most though is that in a day, when people are looking for any reason to sue a doctor and blame them for anything that may go wrong, Dr. Karzel supplies you with a video of the procedure. Pretty confidant if you ask me! Very professional outfit and we are pleased with the results!!" -- Russ T.

"All I have to say is that Dr. Karzel did a fantastic job on my ACL/meniscus knee surgery. I had an unstable knee and with the surgery I believe I will be back to my old self, if not better even. It was unbelievable, surgery went terrific, I had no pain whatsoever after the surgery. Two weeks after the surgery I was off crutches and brace, and now a little over a month I am almost walking without a limp and feeling very well. Dr. Karzel did an amazing job and I am so grateful." -- Janet B.


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