Testimonials

I've had an amazing experience each time I've visited Dr. Marisse and Dr. Kevin Oei.

Being a patient of Upper Echelon has been a really incredible experience so far- personal contact and quick responses from Dr. Kevin have been super stress relieving. Really awesome services and beneficial appointments, the whole office is a great environment and everyone there is super friendly and eager to help. It’s nice having a doctor who personally cares and is more than willing to help- really encouraging and hopeful atmosphere. Very happy to be a patient to Upper Echelon for sure.

My experience with Dr. Oei has been nothing but stellar! I have been a patient of his for the last year and what I have found is that he is great at not only helping me get better, but helping me understand what went wrong in the first place. I have had a few OMT sessions with him to fix some femoral nerve pain that I had after having COVID, and it has been tremendously helpful. I plan to have a few more sessions over the next few months. Also, most of my prescriptions that I've received have been affordable and readily accessible from his office. It saves me trips to the pharmacy and saves me money. If you're looking for a great PCP in the area that will look out for you, look no farther!

I came to Dr. Oei since I was looking for an osteopathic physician in the area who practices osteopathic manipulative treatment (OMT). OMT is one of the very few things that help with my chronic neck pain. I do not have health insurance being in a job transition and working on a per diem basis, but he was willing to work with me for a reasonably priced OMT package. Unlike some physicians, especially those who associate themselves with a big organization, he is very quick to answer any questions or concerns I had - just a text or an e-mail away! As an osteopathic physician myself, I believe that he is very adept in identifying and treating musculoskeletal dysfunctions, what we call "somatic dysfunction." After every session, my neck pain decreases a bit and I could sidebend it a little more. If you're interested in using OMT as a treatment modality (which I hope you are!), do not expect all the pain and restricted range of motion to resolve after one treatment. Let him do the work during multiple sessions; he takes his time and does a good job!

Dr Kevin Oei was very accommodating when I needed my COVID vaccine booster. The whole experience was easy, quick, and painless. His office is in a very nice building in Fullerton, is decorated nicely, and feels upscale. Dr. Oei answered a few questions I had about the booster dose and shared some insight about the pandemic that made me feel at ease. I would highly recommend Dr Oei and am choosing to be a patient of his going forward!

My husband called his office almost closing time. He was busy but he was able to take care of my husband even after hours. We were at the emergency hospital that morning but my husband did not get treated on his pain in his arm and so, we called his office and he was able to get shot for his pain. He is very knowledgeable. He was even able to diagnose his pain correctly. His primary physician said it was carpal tunnel but it was not. We will definitely come here again! The place is also very clean.

In December 2021 I called Dr. Oei's office to see if I can get a rapid covid test. He advised me to come as soon as I can. His office is located in a nice and clean building in Fullerton. Because of the reason of my visit, I didn't have to wait long even though there were people ahead of me. I was glad because I tested positive and wasn't there long enough to get other people sick. Thanks to Dr. Oei I was able to go home and isolate immediately.

When I was in need for a COVID test and most clinics were out of them, Dr. Oei was able to provide one for me. I called his office and he gave me an appointment the very next day. When I arrived, he tended to me immediately.

Great service!

Dr. Kevin was very professional, friendly, and overall an awesome guy. He was able to provide me a rapid rest within a day of my request. Would definitely recommend

No long lines at all for covid testing! Office was very neat and clean and it was super comfortable.

'Everyone is very nice and professional Dr Kevin takes his time to explain all my questions'

'Kevin takes the time to discuss all of my issues and explains everything to me.'

'I have never seen such care that you provided to me in my life time and you even came to my house to save my life? I have no word to say enough about how so special you are doing to save life. May God bless you all and all you have done for me is truly a God scent.'

'Wonderful, compassionate and knowledgeable physician. Highly recommend.'

'Excellent medical care and follow up.'

'Everything was so easy. Staff were very helpful with our situation.. Dr Oei was very patient and accommodating. Shawna was awesome. She definitely has a knack for patient care.'

'Very attentive & informative . Thank you !'

(Translated by Google) Nothing to do with the primary clinics that I have had towards an appointment and they gave me a long time here it is the opposite at the moment they attend to you so it must be a very good atmosphere and they listen to you without hurry you enter quickly you do not expect anything I am very satisfied (Original) Nada q ver con las clinicas primarias q he tenido hacia una cita y me daban a largo tiempo aca es lo contrario al momento te atienden asi debe de ser muy buen ambiente y te escuchan sin prisa entras rapido no esperas nada esto muy satisfecho

Best doctor. Very understanding and caring