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    Kathy K Joo, MD

    2.1 (43 reviews)

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    Page 1 of 2

    Ask the Community - Kathy K Joo, MD

    Review Highlights - Kathy K Joo, MD

    Joo's absolute & diligent care and expertise I have lost over 40 lbs & other areas displayed a remarkable move in the right direction.

    Mentioned in 22 reviews

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    California Endocrine Center

    California Endocrine Center

    4.6(34 reviews)
    3.7 mi

    Interesting information about Dr. R. Alrezk, MD and Professional Bio:…read moreDr. Rami Alrezk, MD, MS, FACP is a triple-board-certified specialist in Endocrinology, Diabetes, and Metabolism, Geriatric Medicine, and Internal Medicine. He is the founder of the California Endocrine Center in Murrieta, CA. His pedigree is elite; He served as a Medical Director at the Cleveland Clinic and completed advanced fellowships at the National Institutes of Health (NIH), UCSF, and UCLA. Dr. Alrezk is not just a clinician but a researcher who developed the Geriatric-Sensitive Cardiac Risk Index, a tool now utilized by major health organizations to improve surgical safety for seniors. He is widely considered an expert in high-complexity cases, including neuroendocrine tumors and rare adrenal disorders. Peer Review: 5/5 Stars The Verdict: Dr. Alrezk represents the rare "physician-scientist" who successfully bridges the gap between high-level academic research and compassionate patient care. What Stands Out The "Triple Threat" Perspective: His background in Geriatrics, Internal Medicine, and Endocrinology allows him to see the "whole picture." He doesn't just treat a thyroid; he understands how that treatment impacts the heart and the aging process. Scientific Precision: Having trained at the NIH and Caltech, his diagnostic approach is more rigorous than a standard community endocrinologist. He is the doctor other doctors send their "mystery cases" to. Patient Accessibility: Despite his world-class credentials, patient feedback consistently highlights his humility and clarity. He has a knack for explaining complex hormonal feedback loops in simple, everyday language. Conclusion: If you are in Southern California and dealing with a complex endocrine issue--especially if you are an older adult--Dr. Alrezk is arguably the most over-qualified (in a good way) and capable specialist in the region. My Review: Dr. Rami Alrezk is one of the best physicians I have in my care team. He is very knowledgeable not only as an Endocrinologist and Neuro Endocrinologist, but he understands the importance of treating the whole body. For years, many physicians I have had in the past, wanted to just jump in and put me on medication that I couldn't tolerate. There was a reason for that, but he was the only one who knew why. He also does ultrasounds, liver scans and Dexa scans in his office himself, which saves time on a diagnosis. I have never experienced the level of care he has for his patience from any other doctor. I guarantee you will get the best care if you establish with Dr. Rami Alrezk. He's one of a kind and quite impressive. Thank you Dr. Rami, for your caring attitude and expertise.

    If I could give more than 5 stars I would- Dr. Rami is the BEST specialist I have ever worked with…read more He takes the time to actually listen to my concerns and has never made me feel dismissed, rushed, or anything close. He is the first endocrinologist I've ever seen who has actually treated me instead of dismissing all of my problems as just "being fat". The office itself is always clean and the front desk staff are all so sweet. Would recommend this office to anyone!

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    California Endocrine Center - Dr Rami Alrezk featured by UCLA newsroom

    Dr Rami Alrezk featured by UCLA newsroom

    California Endocrine Center - EurekAlert features Dr Rami Alrezk research

    EurekAlert features Dr Rami Alrezk research

    California Endocrine Center - Global impact of the article of Dr Rami Alrezk, Update of Pheochromocytoma Syndromes: Genetics, Biochemical Evaluation, and Imaging

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    Global impact of the article of Dr Rami Alrezk, Update of Pheochromocytoma Syndromes: Genetics, Biochemical Evaluation, and Imaging

    Bill Jou, MD - Front of building

    Bill Jou, MD

    4.0(43 reviews)
    2.6 mi

    I just got home from my first visit to Dr. Jou's office and I have never felt so compelled to write…read morea review and post it ASAP. Yesterday, I called Dr. Jou's office and, unlike the other three endocrinologist offices I called, his front office was extremely warm and welcoming over the phone. I felt it was a great start, but contained my enthusiasm for the time being because I have been disappointed down the road so many times before. Fast forward to today's appointment and the front office staff was just as friendly and accommodating in person. They respected the appointment time and got me back to a room not a minute later than scheduled. The nurse who started off my visit couldn't have been kinder and she even checked in with me while Dr. Jou was finishing up with another patient. When Dr. Jou entered the room, I immediately got great vibes from him and noticed his way of letting the patient talk and truly listening to what is being said. He allowed me to fully express how I was feeling, symptoms I've noticed, and never cut me off. He also entered everything I was telling him directly into his tablet. He was thorough in explaining my test results, options for treatment, and timelines. He did not rush anything and had back up plans for every scenario that were clearly well thought out. I honestly don't think I can say that I've ever visited a doctor who I walked out of their office without the regret of not having been given the opportunity to say something about my situation until now. Even on the 45 minute drive back home from his office, I couldn't think of anything that he didn't cover or allow me the time and opportunity to explain or ask. To add a shred of credibility to my words, I would like to say that my father is a (recently retired) cardiologist who had his own practice in North Hollywood. I spent countless hours with him there from the age of 5 years old through my late teens. Therefore, I know a bit about how difficult it can be to ensure your front office staff, the doctor, and the rest of the overall patient experience are all simultaneously performing at an optimal level. Somehow, Dr. Jou's office pulls off that seemingly impossible feat beautifully. In closing, health struggles can be very scary and stranger, friend, or family, I don't want anybody to ever have a poor experience with a medical office during such a vulnerable and stressful time in their life. Therefore, I sincerely hope that you strongly consider choosing Dr. Jou as your first option if you are in need of an endocrinologist. Wishing you the best of health and the best of life.

    Dr Jou is the best very caring and knowledgeable, highly recommend…read more Always following labs and calling his pt making sure they are taking care of themself.

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    Bill Jou, MD - Message from doctor office

    Message from doctor office

    Bill Jou, MD
    Bill Jou, MD

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    Erik Lundquist, MD - Dr. Erik Lundquist

    Erik Lundquist, MD

    3.7(20 reviews)
    0.4 mi

    Dr Lanquist is very knowledgeable and companionate. He is very informative and tries to help the…read morebest he knows how. He makes me feel there's still hope in the medicinal industry. But by all means going through the holistic approach. I am so thankful to God for leading me into Dr Lanquist path to making me be a healthier person with lifestyle changes and natural remedies.

    Dr. Lundquist is the bee's friggin' knees. He is the bomb.com of Dr's. I have seen top specialists…read morefor my crazy health problems and I am a researcher at heart. I've been researching my own issues for the past 4 years. This Dr knows his stuff. I hit the jackpot when I found him. Another bonus is he is right around the corner from my house! I would drive hours to see this doc! When I spoke with a pharmacist at the compounding pharmacy, she asked who my Dr was. I told her Dr L and she said he is one of her favorite Dr's. that he knows his stuff. I'm in bioidentical hormones at the age of 37. He ran the RIGHT saliva tests for my adrenals & sex hormones to find my exact deficiencies. In this last visit, he added a compounded medication that I used to take long ago. It's a controversial immune modulator that is very safe and could help me. He knew all about it. That's impressive. I could go on and on. This Dr has zero ego that I've seen. He totally takes your input. He took an hour with me at last visit to make sure all my needs were met and all questions answered. He is a very laid back guy. His staff is great too. He sends you home with a printed plan. One issue is that suddenly it was taking me over a month to get an appointment. I mentioned it to him and he explained. Greybill Medicals computer system had a glitch and allowed him to take on 250 new patients! He was working 14 hour days trying to get everyone in. He said so egging to management and they caught the issue and corrected it. So scheduling an appointment with this sought after Dr is going to suck for a while until it levels out. I made my two month appointment when I left. He also takes Medicare and IEHP/Medical! Quality for everyone.

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    Erik Lundquist, MD
    Erik Lundquist, MD

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    Deborah Layton, NP

    Deborah Layton, NP

    3.9(11 reviews)
    1.1 mi

    Deborah Layton was the best doctor I ever had in my 57 years on this earth . I saw her regularly at…read moreRancho Medical Group in Temecula. She was a great communicator and NP. Very knowledgeable and willing to listen. One day I messaged her, right after Christmas 2025. She usually gets right back to her patients, at least in my case, but in this case it was several weeks with no response so I figured maybe she was on a vacation. I was quite taken back when I found out that she had left the practice as I had just saw her a week prior to Christmas. . I never heard from her and I was pretty close to her as a patient and she knew so much about me and my medical and health needs. She helped me profoundly and I was absolutely grieved to see her go. It has been difficult to find a doctor like her. I have several conditions and a rare disease. She did not hesitate with unconventional and traditional approaches, and to listen to the patient and their needs as well as how they were feeling, to together come up with the solution that would alleviate the issues as well as provide hope for getting on a good path to overall health and well being and move forward to see what will work optimally for each of unique case. It is now April 2026 and I still am looking for a doctor that is even somewhat what Deborah Layton was.

    Deborah Layton has been a Godsend to me. She cares about her patients, is quick to answer messages…read moreand questions, and knows and supports HRT for women. She is also pro-holistic but still has a great knowledge about, and for the most part, supports western medicine. She is an excellent communicator and quick to address your needs . She doesn't hesitate to offer referrals when needed. All that to say that I love this doctor and Rancho Medical Group. I was very scared when I found out my other doctor stopped taking my medical insurance, but God had another plan and I am so glad that this happened the way that it did otherwise I would not have been introduced to this clinic, nor Dr. Deborah Layton.

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    Deborah Layton, NP
    Deborah Layton, NP

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    United Endocrinolgy - Dr. Patricia Park

    United Endocrinolgy

    1.0(2 reviews)
    4.3 mi

    Well, my primary care physician referred me to Dr. Park, I'm a type 1 diabetic on an insulin pump…read more I called Dr. Park's office, and her office girl was extremely rude, didn't care at all, and blew me off. They are from a corporation called "United physicians". Thunder and off shore out sourced call center in the Philippines, and they don't give a damn about a patient at all. Stay away from any doctor with "United Physicians", just to save a few bucks, they take jobs away from Americans and send those jobs to the Philippines.

    Unfortunately due to Evan's rude customer service & being no help I never got to meet Dr Park for a…read moreactual appointment however if these are the type of employees they have working for The United Medical Doctors Corporation I have no desire to get established. I've waited literally all year since the beginning of January 2023 to be seen and I finally had a appointment today but was informed within less than 24 hrs prior to my appointment that it had been cancelled due to my authorization expiring. Not only was I informed at 4:56pm (and they close at 5pm) but I was told my appointment was cancelled. Not even offering me time to get an extension or a new Authorization. I did my own research and contacted my PCP and insurance to push the auth through (they did and got me a new auth) all for nothing. Evan called my cell left a voicemail saying I can come to the appointment after he had canceled it but I need to get there ASAP. Well I had made arrangements to leave work in plenty of time to make this appointment but when he originally canceled it I didn't bother. My insurance called me to say they had Even on the other line and wanted to 3 way him in I agreed. Evan said they would not accommodate me and I would be too late he than began to yell at me and say I missed a appointment with them just going back and forth. I was so upset I almost drove down to the office to see if he would talk to me like that in person but GOD!!! That's-all I can say. Meanwhile they use virtual health assistants on a different time zone in a different country and it's extremely difficult to communicate with them let alone do something simple like get them to answer the phones. This review is based on Evan and Evan alone. He really must not enjoy what he does for a living and it clearly shows. Management needs to read the google reviews and step it up.

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    United Endocrinolgy

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    Tri Valley Internal Medicine - Very pretty rooms

    Tri Valley Internal Medicine

    3.6(103 reviews)
    2.9 mi

    Parking in front of the office is tight! It's one way only. But there's plenty of parking on the…read morestreet. There's plenty of staff here. I would say they're doing their job but that's about it. The lobby itself is clean and there were plenty of seats. The office has several doctors so it's surprising how few people there were. I didn't wait too long. The medical assistant who brought me back was OK. I came in to see Dr Pleskow- Weismann the allergist today. She has very limited hours but she's practically the only allergist in the area! She was great. She was not rushed. She took her time. I felt she was knowledgeable and am confident in her care.

    My elderly Mother went to Tri Valley for almost 20 years and I was so impressed with the Medical…read moreGroup over the years of attending medical appointments with my Mother, I immediately selected them for my Primary Care when I went on Medicare. I have had interactions with several medical staff over the years - Joe Dematia, Physician Asst. is wonderful and of course Dr. Nguyen is outstanding! The staff is always responsive and professional. I appreciate they are not reluctant to refer a medical issue to a Specialist and order labs, x-rays and scans! SO HAPPY with this group and specifically the Date Street Office! Love they take initiative to call if you are overdue for a 6-month routine check up.

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    Tri Valley Internal Medicine - Patient room.

    Patient room.

    Tri Valley Internal Medicine - Waiting lounge

    Waiting lounge

    Tri Valley Internal Medicine - First dosage of COVID Shot

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    First dosage of COVID Shot

    Kathy K Joo, MD - endocrinologists - Updated May 2026

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