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    John Kavenfar, MD

    5.0 (1 review)
    Closed 8:30 am - 5:00 pm

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    9 years ago

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    Emery Chen MD

    Emery Chen MD

    3.9(7 reviews)
    1.5 mi

    Dr. Chen is a scammer. His Doctor's office was in network but elite robotics wasn't. Sure you can…read moresay it was my fault for not checking, but you'd think that they'd warn you first and they are literally right next door to each other. They make you sign a bunch of papers while you're feeling vulnerable right before the surgery. On top of this, the surgery didn't cure me. After finding out I didn't get cured, he wanted to recommend something they buy off vendors that come into their office to sell stuff. They also only gave me 3 months to pay the balance in full and told me that there was no longer payment plan cause the "doctor has to eat." Went to a real doctor that followed medically proven procedures and was fixed What a snake.

    I went to Dr. Chen in 2019 for a simple hemorrhoid removal. I now have no external sphincter…read morecontrol and am unable to have bowel movements without a regimen of softeners and bulk laxatives. He had business cards saying he was a Rectal Surgeon but turns out he is only a General Surgeon. He decided robotic surgery was best which I thought was a little over the top but what do I know. I thought everything was fine after leaving his surgery center until I tried to have a bowel movement two days after surgery and could not. I felt a foreign object and pulled it out from down there and it turned out to be a Lidocaine patch normally used for muscle pain.....in my rectum. Removing it caused his sutures to come undone. I followed up with him and he only wanted to perform other tests. His office manager was apologetic saying, "We should have told you about the patch." Although I paid the full balance with a Cashier Check; someone called from his office trying to get paid the same amount again. I told them I paid in full and after a little back and forth they relented. His staff was excellent and I feel sorry that they have to associate with a Butcher like Chen. Also: no other surgeon will touch you after going to Chen because they are aware of his sub-standard care. Choose wisely folks.

    Dr. Rafael Lemus - Rangel - Lancaster Robotic & General Surgeon | Dr. Rafael Lemus-Rangel

    Dr. Rafael Lemus - Rangel

    3.8(8 reviews)
    1.5 mi

    Very poor office experience, after surgery zero communication until 15 days after…read more I have no comments about the surgery. But, there was no info or follow up instructions. Some how I am disappointed

    Today, 7/28/2025 after several hours of wait, Dr. Rafael Lemus saw me to tell me his assessment, I…read morehave fat, nothing else is wrong. I, the patient said, obviously I know you're the professional and if you firmly believe your assessment is right based upon my history, why not back it up with a biopsy. The Doctor claimed the office did not conduct biopsy's and that I should seek a second opinion. Clearly, if I wanted an opinion to begin with, I would had gone to Jenny Craig. The Doctors office is called Robotic Surgery, and indeed it is, a robotic service. What's the big mystery, what's the big misconception with professional medical doctor and a robotic doctor, you tell me. Waste of time for a Surgery doctor to claim to have all the answers and give psychic advice. The Doctor forgot, not all statistics run the same for every patient, not everyone's history is the same, not everyone's fat or lipedema's are grown the same way, diet and lifestyle do play a role in staying stable to a certain extent, so disappointing to have a Doctor choose to be tired and dismissive of his work practices.

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    Dr. Rafael Lemus - Rangel - Hernia Surgeon Lancaster | Lancaster Hernia Specialist

    Hernia Surgeon Lancaster | Lancaster Hernia Specialist

    Dr. Rafael Lemus - Rangel - Lancaster Surgeon | Dr. Rafael Lemus-Rangel

    Lancaster Surgeon | Dr. Rafael Lemus-Rangel

    Dr. Rafael Lemus - Rangel - Lancaster Hernia Surgeon, Dr. Lemsu-Rangel, specializing in Hernia Surgery Lancaster

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    Lancaster Hernia Surgeon, Dr. Lemsu-Rangel, specializing in Hernia Surgery Lancaster

    Apollo Surgery Center - Main Entrance to Surgery Suite 101

    Apollo Surgery Center

    4.2(28 reviews)
    5.0 mi

    My experience at the center started off very bad. I arrived a few minutes early 0820 for a 0845…read morecheck in. I didn't want to be late so I got there a little early. I was told to leave and come back at exactly 0845 Without any further explanation. I was tired, hungry and thirsty from fasting for the last 24 hours. I couldn't grab something to drink or eat so I just waited in my car until it was time. After I checked in at the appointed time I still ended up waiting for over an hour to see the doctor. The receptionist set the tone for a bad experience and for this reason I am leaving a bad review.

    I had a colonoscopy, and endoscopy done at Apollo surgery center yesterday. I checked in , and was…read moreseen quickly. The staff was amazing, made me feel comfortable. I was kinda nervous about going under anesthesia, but the entire team in the surgery room made me feel comfortable. I remember someone rubbing my hand as the anesthesia was being inserted. It made me feel so comfortable. Before I knew it it was all over that quick. It was the best sleep ever. This was the best place ever for a colonoscopy and endoscopy. Yes I will be going back in the next 5 years. The doctors are best ever, and the staff is too. If I can give them a million star rating I would. All of the employees in this place was amazing even at the front desk.

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    Apollo Surgery Center - We are located in Lancaster, CA on the corner of Avenue J-8 & 15th St West

    We are located in Lancaster, CA on the corner of Avenue J-8 & 15th St West

    Apollo Surgery Center - Main Building

    Main Building

    Apollo Surgery Center - Front Entrance to Suite 101

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    Front Entrance to Suite 101

    John Kavenfar, MD - surgeons - Updated August 2026

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