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    Kleynberg Leonid, MD

    3.6 (16 reviews)
    Open 8:00 am - 3:00 pm

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    1 month ago

    No help did all just for insurance did all tests they wouldn't even tell me what they were doing.

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    Youram Nassir, MD - Dr. Youram Nassir

    Youram Nassir, MD

    4.7(92 reviews)
    0.4 miMid-Wilshire

    Dr. Nassir is in a class entirely his own. I have never met a doctor like him…read more My husband has faced more medical challenges than most people experience in a lifetime--cardiac arrest, heart transplant, dialysis, kidney transplant, strokes, prostate cancer, parasitic infection, diabetic wounds, spine, rib, and tibia fractures and surgery, amputations... and that's just the short list. We've grateful to have been blessed with excellent medical care over the years, but we have never encountered a physician like Dr. Nassir. We were referred to him after more than 20 medical visits in a single month. My immunosuppressed husband had developed an aggressive squamous cell carcinoma that went from a tiny pimple to a 5 cm x 4 cm x 2 cm thick blackened, mushroom‑like mass on his right temple, extending under the skin to a large lump at his parotid gland and into the lymph nodes in his neck. After consultations at three premier medical centers, we were left with little hope. We were preparing to go home and make the best of what we thought would be his final days. At a last visit with my husband's long‑time primary care doctor--someone we trust implicitly--he told us, "Not all the best doctors are at the premier medical centers," and said he knew the best oncologist in the area. He texted Dr. Nassir, explained the situation, and Dr. Nassir told us to come in at 9 AM THE NEXT MORNING. Not in two weeks. Not when convenient. The next day. At that first visit, Dr. Nassir spent TWO FULL HOURS with us. He carefully reviewed my husband's extensive medical history and every test and consultation from the previous month. While we sat in his office, he called multiple physicians--including two who had already seen my husband and two nationally recognized experts. Every one of them picked up the phone. His assistant, Jose, worked seamlessly beside him, taking notes, pulling records, and preparing referrals in real time. What would normally take weeks happened in a single visit. By the end of that visit, Dr. Nassir had a clear plan: urgent surgery, followed by concurrent radiation and chemotherapy. For the first time in weeks, we felt the fog lift. We left knowing exactly what needed to happen and who needed to be involved--including a radiation oncologist who has since been repeatedly confirmed to be the best in his field. Throughout that visit, staff members quietly stepped in with urgent issues from other patients. Each time, Dr. Nassir gave them his full attention, then returned to us without missing a beat. The new‑patient paperwork had warned that wait times could be long. After that day, I knew I would never complain. If I ever wait to see him, it's because he is giving someone else the same life‑saving attention he gave us. Since that February appointment, my husband has undergone successful surgery and is now nearing the end of a seven‑week treatment plan--five days a week of radiation at Cedars‑Sinai and two days a week at Dr. Nassir's nearby Cancer Care Institute (chemotherapy, IV fluids, labs, and nurse practitioner consultations). He is doing well, and we are hopeful he will beat this cancer. At the very least, we now have more time--time for his two young grandchildren to truly know and remember their grandpa. The entire staff has been exceptional. * Sona, the office manager, knows us personally and creates a supportive environment. * Rosanna and Nana, the chemo nurses, are skilled and attentive. * Mark and Madeleine, the nurse practitioners, ensure every concern is addressed and reviewed with Dr. Nassir. * The front office team is constantly busy yet always available and kind. I would not hesitate for a moment to refer any friend or family member facing cancer to Dr. Nassir. He and his team are in the business of saving lives, and they do it with expertise, urgency, and extraordinary humanity.

    Used to be a great doctor but the last 5 years something happened. Maybe he's burnt out, but your…read morelucky you see him on your appointment dates. The wait is ridiculous and when they do call your name the visit is usually with the NP,not the doctor. Medications if called in are usually wrong and the lack of empathy in the staff shows. Too bad it's turned out like this. I used to rave about this doctor and his office. Now I regret going there. Seems they forgot they are working with cancer patients who need professionalism and kindness. A stage 4 cancer patient waiting to be seen for 2 to 3 hours is ridiculous. Sometimes greed takes over compassion.

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    Youram Nassir, MD - Dr. Youram Nassir

    Dr. Youram Nassir

    Youram Nassir, MD
    Youram Nassir, MD - Dr Nassir and my 86 year old mom.

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    Dr Nassir and my 86 year old mom.

    Jason Cohen, MD - Surgery Group LA - Jason Cohen MD, FACS

    Jason Cohen, MD - Surgery Group LA

    4.8(40 reviews)
    1.2 miBeverly Grove

    Speaking from personal experience, I highly recommend Dr. Cohen as a Surgeon. I had a partial…read moreparathyroidectomy about a year ago. Therefore, I can speak to the actual consultation, surgery and follow-up care. All the consultations, pre-op imaging, and labs were thorough and timely. He discussed options, the actual surgery, and possible complications weeks before I entered the OR for the actual procedure. I had questions about intra-operative monitoring of PTH levels. and anything that could go "sideways." He discussed each in detail so I would be clear going in. One year later, the scar has healed perfectly, my calcium levels are back to normal and I feel good. In the interim, I've had follow-ups and labs as required. In doing my own research, I found that parathryoidectomies have the best outcomes when performed by a surgeon who has extensive experience in that particular surgical niche. Dr. Cohen is that surgeon. In sum, I trusted Dr. Cohen and his team to take care of me and they delivered. Thanks Dr. Cohen and Team.

    Dr Cohen was my surgeon for two procedures. Each time, his skill, professionalism, and kindness…read moreensured not only a successful outcome, but uncomplicated recovery. He is gracious, attentive, and empathic. He made sure to go to my girlfriend in the waiting room to reassure her everything was okay. I hold Dr Cohen in very high regard. I am so grateful to him. Peter.

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    Jason Cohen, MD - Surgery Group LA - Jason Cohen MD, FACS

    Jason Cohen MD, FACS

    Jason Cohen, MD - Surgery Group LA - Jason Cohen, MD, FACS

    Jason Cohen, MD, FACS

    Jason Cohen, MD - Surgery Group LA - Jason Cohen, MD, FACS

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    Jason Cohen, MD, FACS

    City of Hope South Pasadena

    City of Hope South Pasadena

    4.0(36 reviews)
    12.9 mi

    City or Hope is renowned for its treatment of patients with cancer but they offer other care as…read morewell. I needed a new Endocrinologist and a referral led me here. I also thought it would be good to have an "in" just in case. Unfortunately, my experience didn't go well. To be honest, I have a fear of going to doctors and avoid it as much as possible. I arrived early for my appointment as instructed. The staff at the front desk were courteous and professional. About 10 minutes before my scheduled time a nurse escorted me to the room and took my vitals. When she was done, she said the doctor would be in shortly. 35 minutes later - no doctor. The room was cold, my fingers were numb, and I had to get back to work so I walked over to the front desk and told them I was leaving. The next day I received a call asking me if I wanted to reschedule. I said no because I was afraid the doctor would be a no show again and I would find another doctor. Later that day I received another call asking me the same thing, and I gave the same answer. This time the scheduler told me there were two other doctors in the network at the same location and she could book me an appointment with one of them. Unfortunately, the soonest appointment isn't until the end of July but she said she would also put me on the wait list. I appreciate that she went the extra mile to help me. Hopefully, I'll have better luck on my next visit. *Private parking lot.

    I spent the day here with my friend who's undergoing chemo, and it's hard to put into words what it…read morefeels like to sit in a place where people literally fight for their lives -- and the staff does it with compassion, calm, and professionalism that deserves every ounce of respect. I've never been to a chemo facility before. You expect something sterile or clinical, but City of Hope South Pasadena is different. It's human. It's kind. The people here don't just clock in -- they show up. From the front desk to the nurses to the volunteers offering water and candy, everyone treated my friend with dignity and genuine care. We were there about four hours, and in that time, I saw more quiet heroism than most people see in a lifetime. Nurses moving with precision and grace, comforting patients like family. No chaos, no coldness -- just empathy and skill in perfect balance. They even offered me water and candy while I waited -- a small gesture, but it meant the world. It reminded me that while medicine keeps people alive, kindness makes it bearable. Life is short. Sitting here makes you realize how fragile it all is -- and how strong people can be in the face of something so heavy. To the staff here: you are heroes. To anyone reading this -- hug your loved ones, laugh more, and don't take a single day for granted. City of Hope South Pasadena isn't just a medical facility -- it's a place where hope has a heartbeat. The care is professional, the staff are angels in scrubs, and the compassion is real. If your loved one ever needs treatment, know they'll be in good hands here.

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    City of Hope South Pasadena - Entrance

    Entrance

    City of Hope South Pasadena - Clean exam room.

    Clean exam room.

    City of Hope South Pasadena

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    Kleynberg Leonid, MD - oncologist - Updated July 2026

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