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Dr. Chester Zahn, MD

Dr. Chester Zahn, MD

Gastroenterology*
40+ years of experience

Dr. Chester Zahn, MD is a gastroenterologist in San Gabriel, CA and has over 40 years of experience in the medical field. Dr. Zahn has extensive experience in Pancreatic Disease. He graduated from Stanford University School of Medicine in 1983. He is affiliated with medical facilities such as San Gabriel Valley Medical Center and Alhambra Hospital Medical Center. He is accepting new patients and telehealth appointments.

1.5 Star Rating
Based on 45 reviews 1.5 Star Rating (45 reviews)

Practice

1026 E Las Tunas Dr San Gabriel, CA 91776
Telehealth available

Make an Appointment

Hospital Highlight

Dr. Zahn is affiliated with USC Arcadia Hospital Arcadia, a highly rated hospital.

At a Glance

  • Areas of Expertise
    Dr. Zahn specializes in the areas of Gastroenterology & Internal Medicine. See board certifications
  • Offers Telehealth
    This doctor offers telehealth appointments. Call the office to schedule an appointment.
  • Practices at Top Hospital
    Surgical Care Excellence Award™ See hospitals
  • Good Patient Care
    Patients said they had exceptional care at this hospital. See hospitals
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Dr. Zahn's Reviews

Likelihood to recommend Dr. Zahn

1.5
45 ratings, 21 with a written review
5 star
11%
11%
4 star
0%
0%
3 star
2%
2%
2 star
2%
2%
1 star
84%
84%

Your trust is our top concern.

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I have a serious concerns about knowledge. I don’t think he knows medicine and the side effects when prescribed, the pharmacist knows more
What went well
  • Appointment scheduling
  • Wait times
What could be improved
  • Didn't listen or answer questions
  • Didn't explain conditions well
  • Didn't trust the provider's decisions
3 others found this helpful
Helpful
Oct 08, 2021
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Unprofessional provider who claims "Jokes" to diminish a patients pain and concerns which lead to bad outcomes and other doctors having clean up his incompitence. I have no idea how many people he's killed because he is unable to see past weight and thinks it's funny to marginalized overweight people as he disregards their concerns
What went well
No results
What could be improved
  • Didn't listen or answer questions
  • Didn't explain conditions well
  • Staff wasn't friendly
  • Didn't trust the provider's decisions
2 others found this helpful
Helpful
Jun 08, 2021
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Dr. Zahn told a fat patient that her severe stomach pain was irrelevant, because her not eating "was a good thing". He refused to run any tests, and said he wouldn't work with her if she "couldn't handle his sense of humor". She later found out that she has stage 3 colon cancer, and she very easily could have died if she trusted this man instead of getting a second opinion. He should lose his medical license for malpractice.
What went well
No results
What could be improved
  • Didn't trust the provider's decisions
3 others found this helpful
Helpful
Jeri – Jun 01, 2021
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He is a disgrace to the healthcare profession. He undermines women's health and body shames instead of doing his job. He is the cause of many patience going untreated and undiagnosed due to his twisted "sense of humor".
What went well
No results
What could be improved
  • Office environment
5 others found this helpful
Helpful
Mar 08, 2021
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I Cannot believe this man is allowed to practice medicine. He should be fired for his gross negligence of someone's care due to being aggressively biased based on someone's weight. To overlook someone starving themselves because of severe pain is horrible
What went well
No results
What could be improved
  • Office environment
  • Difficult to schedule appointment
  • Didn't listen or answer questions
  • Didn't explain conditions well
  • Staff wasn't friendly
  • Appointment was rushed
  • Didn't trust the provider's decisions
  • Long wait times
6 others found this helpful
Helpful
Mar 01, 2021
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Dr Zahn is incredibly narcissistic, rude, and has a horrible bedside manner. He clearly does not care about his patients.
What went well
No results
What could be improved
  • Office environment
  • Didn't trust the provider's decisions
5 others found this helpful
Helpful
Feb 11, 2021
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This man is a disgusting quack who should lose his license immediately. Scum of the earth and an insult to medicine.
What went well
No results
What could be improved
  • Didn't listen or answer questions
  • Didn't explain conditions well
  • Didn't trust the provider's decisions
6 others found this helpful
Helpful
Feb 09, 2021
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Should be ashamed for belittling his patients and providing no help for those in pain and desperate need.
What went well
No results
What could be improved
  • Didn't listen or answer questions
  • Didn't explain conditions well
  • Didn't trust the provider's decisions
11 others found this helpful
Helpful
Feb 05, 2021
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I’m plus sized- Told him I was in pain when I eat so I haven’t been eating and he said “ maybe that’s a blessing” when I asked him to repeat himself as if I miss heard he said “ maybe that’s not such a bad thing” when I demanded and apology he said I just didn’t get his “sense of humor”. I will never forget the dr who not only said it is ok to starve myself because I’m over weight but also didn’t help me with my issue at all. This man doesn’t care about you. Go somewhere else he’s a beach toilet of a human.
What went well
No results
What could be improved
  • Office environment
  • Didn't listen or answer questions
  • Didn't explain conditions well
  • Staff wasn't friendly
  • Appointment was rushed
  • Didn't trust the provider's decisions
38 others found this helpful
Helpful
Amanda Lee – Feb 05, 2021
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Very unprofessional! Makes rude comments about pts weight when pt expressed concern about pain they were in and disregarded concerns.
What went well
No results
What could be improved
  • Didn't listen or answer questions
  • Staff wasn't friendly
  • Appointment was rushed
  • Didn't trust the provider's decisions
9 others found this helpful
Helpful
Feb 05, 2021
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Fatphobic and unprofessional. Should care more about treating his patients than judging by outward appearance pathetic.
What went well
No results
What could be improved
  • Didn't listen or answer questions
  • Didn't explain conditions well
  • Staff wasn't friendly
  • Appointment was rushed
  • Didn't trust the provider's decisions
10 others found this helpful
Helpful
Feb 05, 2021
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I wish I could give 0 stars. This man is horrible — he has no bedside manner and does not take his patient’s pain seriously. STAY FAR AWAY!
What went well
No results
What could be improved
  • Didn't listen or answer questions
  • Didn't explain conditions well
  • Appointment was rushed
  • Didn't trust the provider's decisions
8 others found this helpful
Helpful
Feb 05, 2021
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Does not know how to listen to patient and diagnose! Could lead to worse issues down the line
What went well
  • Wait times
What could be improved
  • Didn't listen or answer questions
  • Didn't explain conditions well
  • Didn't trust the provider's decisions
4 others found this helpful
Helpful
Feb 04, 2021
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Dr. Zahn is the type of doctor that you never wish to have. He doesn’t deserve to be called a doctor. Being a doctor means CARING for your patients and he does not know how to do that. Worst doctor ever.
What went well
No results
What could be improved
No results
4 others found this helpful
Helpful
Feb 04, 2021
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He's fatphobic. A client came in with such bad pain they couldn't eat and was starving themselves. He replied with, "Maybe that's a good thing,". That would be an eating disorder if it wasn't caused by her pain. He said it was a joke. You are a doctor not a comedian. You should be ashamed and fired.
What went well
No results
What could be improved
  • Office environment
  • Didn't listen or answer questions
  • Didn't explain conditions well
  • Staff wasn't friendly
2 others found this helpful
Helpful
Feb 04, 2021
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deserves zero stars as he provides his patients with zero compassion. he sucks - stay away and find someone better.
What went well
No results
What could be improved
  • Office environment
  • Difficult to schedule appointment
  • Didn't listen or answer questions
  • Didn't explain conditions well
  • Staff wasn't friendly
  • Appointment was rushed
7 others found this helpful
Helpful
Feb 04, 2021
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He lacks compassion for the patient. A very assertive, condescending person. He does not offer any alternatives other than his way or the highway. However, he does know his specialty.
What went well
  • Office environment
  • Appointment scheduling
  • Staff friendliness
What could be improved
  • Didn't listen or answer questions
  • Didn't explain conditions well
5 others found this helpful
Helpful
David – May 21, 2020
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Dr. Chester Zahn is a doctor who truly cares for his patients’ health! Before my grandmother passed away peacefully, she had been going to Dr. Zahn for many years and treats him as her primary doctor. There was one incident when my grandmother was home alone and called Dr. Zahn’s office. On the phone, Dr. Zahn reported that he couldn’t hear my grandmother make out any words. Dr. Zahn immediately realized that something was very wrong. He called the ER and ordered a CT Scan and treatment to be prepared and ready. He personally went to my grandmother’s home with the ambulance and its team and found her on the ground unable to speak and unable to move her body. She was suffering from a stroke! He took the ambulance with her to the ER and followed her for her whole hospital course. Thanks to Dr. Zahn, my grandmother received the treatment she needed and was successfully discharged and was able to walk again after some rehab. She went on living another healthy 15 years thanks to Dr. Zahn!
What went well
No results
What could be improved
No results
2 others found this helpful
Helpful
May 30, 2019
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Very rude and a very horrible doctor.
What went well
  • Wait times
What could be improved
  • Office environment
  • Difficult to schedule appointment
  • Didn't listen or answer questions
  • Didn't explain conditions well
  • Staff wasn't friendly
  • Appointment was rushed
  • Didn't trust the provider's decisions
9 others found this helpful
Helpful
pasadena, CA – Oct 23, 2018
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Doctor's manner was very rude and no patients to listen to his sick patient and patient's family when they asked him questions. The medicine he prescribed causes a lot of side effects.
What went well
No results
What could be improved
  • Didn't listen or answer questions
  • Didn't explain conditions well
  • Staff wasn't friendly
  • Appointment was rushed
  • Didn't trust the provider's decisions
  • Long wait times
14 others found this helpful
Helpful
Shu in San Gabriel, CA – Mar 16, 2017
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About Me

biography

Dr. Chester Zahn, MD is a gastroenterologist in San Gabriel, CA and has over 40 years of experience in the medical field. Dr. Zahn has extensive experience in Pancreatic Disease. He graduated from Stanford University School of Medicine in 1983....read more
  • Gastroenterology

  • Internal Medicine

*Healthgrades does not verify qualifications for medical specialties. Please verify your provider's specialty and qualifications directly with your provider and applicable medical board.

  • Montefiore M C H&l Moses Division

    Residency Hospital
  • University Of Mi Hosps And Health Ctrs

    Residency Hospital
  • University Of Michigan Hospitals

    Fellowship Hospital, 1988
  • Montefiore Medical Center - Moses Division

    Internship Hospital, 1986
  • Stanford University School Of Medicine

    Medical School, 1983
American Board of Medical Specialties®
American Board of Internal Medicine®
Gastroenterology
Internal Medicine
For detailed information about any of the below board actions, please search for the provider's records on the linked state licensing board or the Federation of State Medical Boards. To learn more about the difference between these sources, please refer to our FAQs.
Healthgrades has not received any data indicating a board action exists for this provider.
  • English

  • Chinese

Locations

Practice

Zahn & Associates A Medical Corporation1026 E Las Tunas Dr San Gabriel, CA 91776
1

Practice

Alhambra Hospital Medical Center100 S Raymond Ave Alhambra, CA 91801
2

Affiliated Hospitals

  • Alhambra Hospital Medical Center

    100 S Raymond Ave
    Alhambra, CA 91801

    How patients felt about the care they received at this hospital.

    84%
    Patients said they were given information about recovering at home
    77%
    Patients said that nurses always listened to them and explained things well

    2% higher than the national average

    View all patient feedback
  • San Gabriel Valley Medical Center

    438 W Las Tunas Dr
    San Gabriel, CA 91776

    How patients felt about the care they received at this hospital.

    83%
    Patients said they were given information about recovering at home

    1% lower than the national average

    77%
    Patients said that nurses always listened to them and explained things well

    2% higher than the national average

    View all patient feedback
  • USC Arcadia Hospital

    300 W Huntington Dr
    Arcadia, CA 91007
    Recipient of 8
    hospital awards

    Surgical Care Excellence Award™ (2025, 2024)

    Superior clinical outcomes in surgical care across 15 of the most common in-hospital surgical procedures including cardiac, vascular, joint replacement, prostate, spine, and gastrointestinal surgeries

    View all awards

    How patients felt about the care they received at this hospital.

    82%
    Patients said they were given information about recovering at home

    2% lower than the national average

    73%
    Patients said that doctors always listened to them and explained things well

    3% lower than the national average

    View all patient feedback
Learn more about how Healthgrades measures Hospital Quality