Jon M. Onosaki, PAC
Yorba Linda, CA 92886
- Mission Heritage Medical Group and Affiliated Physicians
- St. Joseph Heritage Medical Group and Affiliated Physicians
- St. Jude Heritage Medical Group and Affiliated Physicians
St. Jude Heritage Yorba Linda - Orthopedic Surgery
4300 Rose Drive, Suite G, Yorba Linda, CA 92886
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- Blue Shield of CA Medicare Advantage
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View More Providers
Quinnipiac College
- National Commission on Certification of Physician Assistants, Physician Assistant
- National Commission on Certification of Physician Assistants, Orthopedic Surgery

Community Reviews
At Providence, we're dedicated to providing you quality, personalized health care. We are constantly striving to optimize your experience.
As part of ensuring you have a positive experience with Providence, our online provider directory includes ratings and patient comments for select providers. More about our survey.
Excellent care provider! Was able to answer all my questions and problem-solved with me regarding an upcoming vacation.
Providence Patient
Very pleased with this clinician and the practice office.
Providence Patient
Jon Onasaki is an outstanding provider that has extreme expertise and experience. He patiently listens and thoroughly explains and answers all questions. I am referring some family members to him. Thank you Jon.
Providence Patient
Jon was very knowledgeable and explained my surgical result very clearly. His input going forward was also extremely helpful.
Providence Patient
During this first visit with Dr. Onosaki I found him to be knowledgeable with a wonderful bedside manner. I left the office feeling as if I had known him for a long time.
Providence Patient
Able to handle any questions concerning rehab
Providence Patient
Great experience. It's a bit of a drive
Providence Patient
Dr Yin and Jon Onasaki are the best! Incredibly professional, knowledgeable, thorough, and respect your time.
Providence Patient
Excellent care and service!
Providence Patient
Dr. Bae, my primary is awesome. He referred me to Dr. Yin for hip replacement surgery. He and PA Jon Onosaki, together saw me for on [Date] for my post-op visit.
Providence Patient
Grateful for the consciousness care I received here.
Providence Patient
The Doctor was very clear and helpful. I feel he's an excellent physician
Providence Patient
He is an excellent provider, very courteous, professional, and explains well and listens well
Providence Patient
John Onosaki was very professional and explained everything thoroughly. He did not rush through my appointment and listened to my questions or concerns.
Providence Patient
Great care from Jon and team.
Providence Patient
All was good!!
Providence Patient
Excellent experience for follow up for recent surgery.
Providence Patient
This was a post surgery follow up, the fourth since my surgery. I had a number of questions related to my current status and Jon listened and addressed the questions I had. There was no pressure to hurry up and finish, he was attentive and listened to what I had to say
Providence Patient
Doctor was patient, kind attentive. Bedside manner was excellent, any fear or anxiety I had disappeared after speaking to the doctor. Office staff was friendly and helpful. Because of the care l no longer fear Having the second knee replacement surgery. [Name(s)]
Providence Patient
Love the way Jon Onosaki listens to everything I have to say. He makes his assessment and tells me in terms I can understand.
Providence Patient
Great experience.
Providence Patient
Jon Onosaki is a caring PA who listens, offers suggestions, and is competent at what he does.He really takes an interest in my concerns.and never rushes through my appointments.He is an asset to the orthopedics department.
Providence Patient
And I Have Referred Several People!
Providence Patient
Outstanding service, knowledge and overall interaction
Providence Patient
I have sent over 25 people to this office for care in the last 2 years. Excellent Dr and PA!
Providence Patient
Excellent care and outcome of knee replacement
Providence Patient
Dr. Yin, and his PA, John Oisake are excellent providers, I would strongly recommend them.
Providence Patient
My appointment with Jon Onosaki PA was very thorough but best of all he was very pleasant with excellent bed side manner.
Providence Patient
Both Dr Yin and Onosaki are amazing
Providence Patient
Very thorough, personal and attentive. Dr.Yin examined my MRI together with me. He diagnosed and pointed out exactly where my supraspinatus torn was, why it needed surgery, consequences and benefits, as well as the expected recovery time. Jon Osaki has been very helpful throughout the recovery process. He gave specifics PT tips that helped to break my scar tissue and regain my range of motion 3 months ahead of schedule! Overall, Iam very pleased with my decision to choose Dr. Yin and Jon. I highly recommend them to others.
Providence Patient
Jon is an amazing PA. He is professional, humble, and an excellent clinician. Jon clearly explained what was going on with my hip and described my progress. Give Jon a raise!
Providence Patient
I love that John is always patient and seems very kind and caring on a personal level.
Providence Patient
All good
Providence Patient
This PA provider and primary orthopedist provider, Dr Yin, are outstanding In all areas of their practice, communication, demeanor, and collaboration.
Providence Patient
This office and their care is some of the best I have experienced. I'm thankful.
Providence Patient
Always good service
Providence Patient
Always excellent care provided
Providence Patient
I come in and greeted with a smile, treated with respect and all my questions are always answered. The team is very good to work with.
Providence Patient
Excellent in all areas.
Providence Patient
Jon is always pleasant and helpful.
Providence Patient
Jon Onasaki and Dr Yin are excellent
Providence Patient
Very friendly & listened carefully, as well as explaining everything really clearly.
Providence Patient
Was very happy with the surgery, and all the care after. I'd give them a 10
Providence Patient
This was a post-op visit. Jon took the time to answer all of my questions and provide me with the results of my surgery
Providence Patient
I am grateful for the wonderful care that I have received from Dr. Yin and his support team. Everyone that I have interacted with have been very professional and caring.
Providence Patient
Very good experience. Questions are always answered. Would recommend.
Providence Patient
Was extremely pleased with the time I spent with Jon. Did not rush, was very thorough in answering all my questions, and even asked questions of me that were very insightful. Great personality also and was very approachable.
Providence Patient
Dr was very helpful. I would recommend Dr Yin and Pa Jon Onsaki
Providence Patient
John is very professional and explain in a manner that is easy for me to understand. He is very professional and courteous.
Providence Patient
Great Care!
Providence Patient
Jon Onosaki genuinely cares
Providence Patient
Love every doctor in this group, including lab testing. Could not be any happier. Keep up the great work.
Providence Patient
Kind n caring office.
Providence Patient
Very much satisfied with my appointment Everyone was very professional and helpful
Providence Patient
Very confident in this DRs care
Providence Patient
Excellent! Listens and is attentive. Addresses all my concerns and has great bedside manner. Very welcoming and easy to talk with.
Providence Patient
Very good
Providence Patient
Excellent
Providence Patient
Excellent provider
Providence Patient
It has always been a good experience with Dr. O. He covers everything and is extremely knowledgeable!
Providence Patient
All the people I've interacted w at Providence have been personable, courteous, respectful and attentive.
Providence Patient
John was extremely patient and listened to my concerns. He took time and explained everything I was feeling uncomfortable with. He is a very pleasant young man. I went to my post op appointment feeling very worried and he eased my anxiety within minutes of my arrival.
Providence Patient
Very Good Experience
Providence Patient
Dr. Jon was very kind and knowledgeable. His kindness was welcomed. He has followed up with me post op and been very tentative to my needs. Top 10 doctor.
Providence Patient
Jon was great and was able to help me with my questions about my lift leg.
Providence Patient
Jon is a great people person and is able to explain medical issues in an easy to understand manner
Providence Patient
Jon and Dr. Yin are both very good at explaining things that will be happening. Very helpful and good listeners.
Providence Patient
It's very good that Jon did the post-up for me on [Date] 2024. He is very patiently to let me know what should I do after my knee replacement. Very good PA!
Providence Patient
My experience with Jon Onosaki has been nothing but fantastic. Each visit ends with a clear understanding of the status of my knee replacement recovery and what I need to achieve before my next visit
Providence Patient
Jon Onosaki is and excellent provider. He answers in detail and easy to understand language, any questions I have. I feel confident that I am in good hands.
Providence Patient
Great hip replacement experience with Dr. Bob Yin and his PA, Jon Onosaki.
Providence Patient
I wasn't completely comfortable with the PA. His exam was good but I didn't like his attitude toward my shoulder issue. I did like the fact that he ordered an MRI. He was too abrupt for me, I didn't care for his bedside manner.
Providence Patient
Jon provides excellent care and has amazing bedside manner. Very thorough with every visit. My parents both had shoulder surgery & their follows ups have been timely and I know a big part of thir healing is Jon's care. Thank you Jon for everything you're a great provider!
Providence Patient
Excellent care and guidance
Providence Patient
All good.
Providence Patient
Jon's positive attitude and upbeat energy is greatly appreciated. Glad he is part of the team to help me get back on track.
Providence Patient
Jon Onosaki is very caring, knowledgeable and capable person who takes the time to really listen to concerns, symptoms, etc.and explains things clearly as he proceeds.The orthopaedic staff is very friendly and nice also.
Providence Patient
Everything was fine
Providence Patient
No bad experience
Providence Patient
Both Jon and Dr Yin saw me and both are great!!
Providence Patient
Excellent care from start to finish
Providence Patient
Articulate Focused. Efficient Pleasant
Providence Patient
Jon is an excellent PA
Providence Patient
Experience was great. This team did a phenomenal job even with my disability and [Name(s)] forms. The ortho office at the plaza building has poor timeliness with forms according to my family member. Very responsive YL ortho office and great team. Jon was wonderful and pleasant.
Providence Patient
I drive approx. 1 hr to see this provider. I have a lot of respect and confidence In this provider. I always get the best care and advice.
Providence Patient
Always concern my needs
Providence Patient
Excellent service
Providence Patient
Very happy with Jon Onasaki answering any questions and concerns I may have.
Providence Patient
This office is the best
Providence Patient
This hip replacement was like a miracle. Extremely well done. Highly recommend to anyone.
Providence Patient
It's a pleasure being seen by Dr. Yin and PA Jon Onosaki, they are both consummate professionals, & office staff-support are great!
Providence Patient
Love my doctor Excellent doctor
Providence Patient
I had knee replacement surgery in May of 2023 and felt the care I received to be excellent.
Providence Patient
Very friendly, knowledgeable and took the time to explain everything in detail.
Providence Patient
The doctor and staff were very willing to discuss procedure and after care.
Providence Patient
Always made to feel comfortable and respected. Easy to talk to and very understanding of any concerns I have.
Providence Patient
Always responsive and open and frank with my condition. Good explanations.
Providence Patient
Excellent provider!
Providence Patient
During the visit with my provider, I received excellent care. The doctor was always courteous and patient to answer all my questions.
Providence Patient
Jon showed genuine concern for my condition. He is respectful, attentive and pleasant.
Providence Patient
Everthing is excellent
Providence Patient
Good experience
Providence Patient
Jon Onosaki,PA is so kind and thorough. He listens and is so extremely knowledgeable. I Highly Recommend him!!
Providence Patient
Once you get an appointment the care is excellent. I would recommend them to anyone and everyone. I love this office!
Providence Patient
Jon was fantastic to work with. He took the time to discover my complaints, did a comprehensive examination and gave me suggestions for solving the issue.
Providence Patient
The urgency of the immediate repair of my shoulder rotator cuff tear was completed in a most expeditious manner correcting my injury.
Providence Patient
Great service
Providence Patient
Very good, treated like family. Very grateful!
Providence Patient
A very professional team, very courteous, and well aware of what is going on. Keep up the good work.
Providence Patient
Clinical Interests
- Abnormalities Of The Tarsal Bones
- Accessory Navicular
- Achilles Tendon Injury
- Achilles Tendonosis
- Acromioclavicular Joint Separation
- Ankle Dislocation
- Ankle Fracture
- Ankle Injury
- Ankle Tendon Tear
- Anterior Cruciate Ligament (Acl) Injury
- Arm Fracture
- Arm Injury
- Arthritis
- Arthritis Of Knee
- Bursitis
- Bursitis Of The Elbow
- Cartilage Injury
- Chronic Muscle Injury
- Chronic Tendon Injury
- Clavicle Fracture
- Compartment Syndrome
- Compound Fracture
- Dislocated Patella
- Distal Radial Fracture
- Elbow Bone Spur
- Elbow Dislocation
- Elbow Fracture
- Elbow Injury
- Elbow Sprain
- Epicondylitis
- Femur Fracture
- Fibula Fracture
- Foot Tendon Tear
- Forearm Fracture
- Frozen Joint
- Fundoplication
- Gluteal Injury
- Hamstring Injury
- Heterotopic Ossification
- Hip Abductor Tear
- Hip Arthritis
- Hip Dislocation
- Hip Fracture
- Hip Impingement
- Hip Injury
- Hip Osteoarthritis
- Humerus Fracture
- Iliotibial Band Friction Syndrome
- Joint Dislocation
- Joint Infection
- Joint Sprain
- Knee Dislocation
- Knee Fracture
- Knee Injury
- Knee Instability
- Lateral Epicondylitis
- Leg Fracture
- Leg Injury
- Leg Mass
- Ligament Injury
- Ligament Tear
- Medial Collateral Ligament Injury Of The Knee
- Medial Epicondylitis
- Meniscus Injury
- Meniscus Tear
- Monteggia Fracture
- Muscle Injury
- Muscle Strain
- Muscle Tears
- Non Displaced Fracture
- Non-Displaced Fracture Of Radius
- Nonunion Fracture
- Olecranon Bursitis
- Orthopedic Infections
- Osteochondral Lesions
- Osteochondral Lesions Of The Hand And Wrist
- Osteochondroma
- Osteonecrosis
- Osteonecrosis Of The Hip
- Overuse Injury
- Paratenonitis
- Patellofemoral Syndrome
- Pectoralis Major Tendon Injury
- Pelvic Fracture
- Prosthetic Joint Infection
- Proximal Ulnar Fracture
- Quadrangular Space Syndrome
- Quadriceps Injury
- Radial Fracture
- Radial Head Fracture
- Radial Pseudarthrosis
- Repetitive Stress Injury
- Rotator Cuff Disorders
- Rotator Cuff Injury
- Separated Shoulder
- Shoulder Dislocation
- Shoulder Injury
- Shoulder Instability
- Shoulder Strain
- Snapping Hip Syndrome
- Sports Related Injury
- Stress Fracture Of The Radius
- Stress Fractures
- Synovitis
- Tendinosis
- Tendon Injury
- Tenosynovitis
- Tibia Fracture
- Tibial Spine Fracture
- Tibial Tendonitis
- Ulnar Fracture
- Ulnar Nerve Compression
- Work Related Musculoskeletal Disorders
- Wrist Dislocation
Really liked my doctor and the care.
Providence Patient