1. Gilbert John M Jr MD

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    Fullerton, CA

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    Gilbert John M Jr MD

    1.3 (9 reviews)

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    6 months ago

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    8 years ago

    Could never actually speak to anybody ever to schedule a appointment. Put on hold several times. For at one point 20min.

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    10 years ago

    Horrible medical care left to the hands of unlicensed people in his office. Too busy to properly care for his patients.

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    9 years ago

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    Upper Echelon Medical

    Upper Echelon Medical

    4.9
    (56 reviews)
    0.8 mi
    Established in 2021
    Locally owned & operated

    I had been in the market for medical insurance through Covered CA but the cheapest one I could…read morefind, that also allowed me to go to the doctors I had been going to for years, was a bit expensive. I decided to look into other options and did a search for places I could pay out of pocket. When I lived in Mexico, I had been using the services at a local hospital, paying a monthly membership fee for their services so imagine my surprise when I found out that the exact same system existed here. That was when I found Dr. Marisse so I booked an appointment. I found her originally on Zocdoc and the nearest appointment was in a month and a half. Within a day of making the appointment, I was called by the office to Nurse Shawna who wanted to make sure that I knew that all appointments needed a preliminary chat with the Doc, after which I could book my appointment. thanked me for letting her know that the next available appointment was that far away. It turned out there was a mix-up and that she did have more immediate appointments available. There is plenty of parking, as it is in shared parking lot with other businesses. However, there are two buildings with the same building number but with different locale numbers. Upper Echelon is in the building nearest to the AAA and the Farmer Boys. At the appointment, everything was clearly explained and we went over a sort of plan of attack, with regards to my concerns and what I needed to do. I appreciated paying less per month for the membership, which includes as many appointments as you want. The lab work and the tests are at wholesale prices so even with the membership fee and registration, all of this was cheaper than the plan I was going to get with insurance. What I appreciated was the quickness of getting an appointment. I have always hated waiting a few weeks, as a new patient, before actually being seen but I was able to book this within a week of the appointment. It was a week because their availability interfered with my work hours. Otherwise, I would have been seen earlier. All in all, it is pretty convenient and a wallet-friendly option. After that first appointment and the lab results came in, Dr. Marisse wrote a VERY long email detailing every point of concern. Which I appreciated because I went for answers and I was getting them. If you need a straightforward person to tell you what you need to be doing and not someone who has to be on your ass every step of the way, this is the ideal option. I would say the ONLY con is that they do not have appointments during the weekends. And since I work during the week, I have to take time off to go to an appointment.

    I always have excellent experiences at Upper Echelon Medical Office in Fullerton. From the moment I…read morewalked in, everyone was welcoming, professional, and made me feel comfortable. A special thank you to Shawna and Karla--they went above and beyond to provide outstanding care. They were incredibly kind, attentive, and took the time to answer all of my questions without making me feel rushed. Their professionalism, compassion, and positive attitudes truly made a difference and turned what could have been a stressful visit into a great experience. It's rare to find a medical office where you feel genuinely cared for, and Shawna and Karla exceeded my expectations. I highly recommend Upper Echelon Medical Office to anyone looking for quality care and exceptional customer service. Thank you both for making my visit such a positive one! Dr. Marisse is truly one of the best doctors I've ever had. She explains everything clearly, never makes you feel rushed, and always makes you feel like your health and well-being are her top priority. Her professionalism and caring attitude give me complete confidence in the care I receive. I highly recommend Dr. Marisse to anyone looking for an exceptional physician.

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    Upper Echelon Medical
    Upper Echelon Medical
    Upper Echelon Medical

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    Daniel J Kim, MD

    Daniel J Kim, MD

    3.4
    (15 reviews)
    0.2 mi

    Avoid this doctor Kim, they are the worst, make sure to ask how much they will charge you prior to…read moredoing any check ups or treatments. For 1 day only, they charged 936 dollars, before insurance charges. My insurance was able to pay about half the price, but still it's an unreasonable amount. They denied telling me the prices, and I found out at the end the prices after my check up, and it was crazy. Make sure to triple check all the charges prior to taking any treatment. The lady on front will most likely tell you that they don't know the costs, since they need to check with your insurance first, so make sure to ask how much everything costs prior to insurance covering. It is a ridiculous amount that no one should pay for.

    I originally chose Dr. Kim as my PCP because of the rave reviews he had on Yelp and on Google…read more Unfortunately, my experiences with him were less than stellar. At my first visit with him, he rushed me through my general physical and talked *at* me rather than *to* me. I tried to talk to him about what I thought was a food allergy, and after I described what I was experiencing, he said, "if those foods are bothering you, then just don't eat them." I was kind of baffled by that. "Yes, of course," I agreed,"but I'd like to know if I'm truly allergic or not." His response was: "I can send you to an allergist, but they're really not going to be able to test for that." I suggested seeing a GI doctor; but his response was the same: "Waste of time." Oh, and he did all of that at the top of his voice in a quiet office. Thanks. I appreciate a doctor that can tell me the truth without the sugar-coating; but after getting a second opinion (which suggested I do see a GI to *confirm*), it was clear that Dr. Kim really didn't have time for me. The only upside to seeing this doctor was his outstanding office staff. PS. St. Jude Medical Ctr charges for parking in 30 minute increments, which is just plain mean.

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    Nitta Douglas MD

    Nitta Douglas MD

    2.4
    (17 reviews)
    0.1 mi

    *Always on "vacation" *Never takes the time to really know…read morewhat's going on with you *Never gives any useful advice *NEVER FOLLOWS UP I've been a patient since I was kid and growing up I never liked the way Dr. Nitta conducted his visit it's like your in and out in 5 minutes and he doesn't even do a full on check up to see how things are. The nurses at the front desk are nice and have always been nice it's just this doctor like I don't know if he knows what he's doing or if he just simply doesn't care about people and it's sad because most if not all doctors are just in it for the business and not in it to too really take your health seriously and help you find out the best treatment/cure for whatever health condition you have. I'm tired of hearing "your okay" or "you'll be fine" like I'm not okay my body doesn't feel fine I'm in pain, I'm sick and what are you doing about it?? NOTHING.

    4 stars for Dr. Nitta and 1 star for the office. If you want results, you need to basically harass…read morehis office staff, which I don't want to do. I have had an appointment 5 weeks in advance. They canceled 10 days before, so I called back, left a message, then another message with someone who said they'll call back. No call back. I called again and they said that have an opening in 6 weeks, but only a few spots; otherwise I'll have to wait much longer. This isn't the first time. Also, if you need a specialist or recommendation, it might take 2+ weeks for them to get back to you (with you calling at least 3 times to remind them). If they say they'll call you, never expect a call back. Dr. Nitta is great, always listens and does his best to help. I recommend him, but I can't jump over several hurdles to get an appointment, specialist or basic help anymore. I understand the office can be busy, but there is a difference in being busy and having an absolutely apathetic response to patients.

    St Jude Heritage Medical Group

    St Jude Heritage Medical Group

    2.6
    (30 reviews)
    0.3 mi

    This hospital somehow always gets my billing wrong and I am charged when I go in for an annual…read morewellness check that should be fully covered by my insurance. This has happened TWICE with no effort to correct it. I end up on the phone for hours trying to resolve and the staff there are no helpful. It has been the most frustrating experience and I would never ever recommend this to anyone. I have never had to pay extra for wellness exams at other hospitals but somehow always end up with a bill here due to coding errors which they do not bother to fix

    This review is for the office to donate blood .Stay away far far away this place is a joke they…read morejust keep taking people in all day long not caring how long you wait. First our paperwork said they open at 0730 and it's only walk in only no appointments So I arrived when they opened and already 25 people waiting and some had appointments I ask the gentleman at the office he said some of people make an appointment my chart but they don't tell you this when you call them. So if you walk in they just keep pushing your name back in line. After almost 2 hours I finally got in for a 3 min blood drawn . They should tell people when you check in it's going to be at least 2 hours and you will get pushed back by appointments first. It's like everyone that works in this office have and attitude and or unhappy no smiles at all maybe they shouldn't be working with people or they have been doing it so long they hate everyone. Just go somewhere else save your sanity

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    Full office since opening
    Full office since opening
    Lines outside people waiting
    Lines outside people waiting
    Line just to check in

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    Line just to check in
    St Jude Heritage Medical Group

    St Jude Heritage Medical Group

    2.7
    (42 reviews)
    2.1 mi

    Plenty of patient parking…read more Clean building/office. There are different departments in this building. Lots of patient seating area in Suite 200. Easy to check-in. Have to check in 15 min before appointment. And then wait 10-15 min after your appointment is when they call you. While the assistant takes your weight and do the health history questionnaire, you have to wait more time for the doctor to come in your room. Appointment at 11:40, came there 11:15, they called me 11:55 and then waited for doctor in the room for around 12:15. Bring your own water bottle; they don't have water fountains or water for patients to drink while you wait. They don't have walk ins for lab anymore. I fasted cuz I wanted to do lab after doctors appt. Have to be appointment only now. St. Jude providence sold their lab to LabCorp.

    I really like st. Jude before, recently not su much and made me feel even stressed just to have…read moreappointments with them. This year, I changed my PCP from Jennifer Lu, MD to Angelina Sidharta MD. Since then, this becomes miserable experience with St.Jude. The 1st time, there's an opening and I scheduled appointments since my leg was in pain. That was happened on Friday and Monday I took day off since it was still in pain and Tuesday for doctor appointment. In the morning of the appointment, they called me if they need to cancel my appointment and reschedule. The been calling me since then to reschedule. How convenient for them! Today, they called me again. My husband and I have doctor appointments tomorrow and only within 24hrs they called and mentioned for my husband insurance if not assigned to Dr. Sidharta and need to reached if I don't have registrations changed notification from his insurance. I'm at work and this makes me crazy since I'm not able to work because of this whole situation. Only notified patient within 24hrs. How very convenient for them. The assistant name is Josiah, the one kept calling me. St. jude, I know you can do better.

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    St Jude Heritage Medical Group
    St Jude Heritage Medical Group
    St Jude Heritage Medical Group

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    Gilbert John M Jr MD - physicians - Updated July 2026

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