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Dr. John Zamarra, MD

Dr. John Zamarra, MD

Cardiology*
50+ years of experience

Dr. John Zamarra, MD is a cardiologist in Fullerton, CA and has over 50 years of experience in the medical field. Dr. Zamarra has extensive experience in Adult Congenital Heart Conditions. He graduated from State University of New York at Buffalo in 1972. He is affiliated with medical facilities Adventist Health Sonora and Bear Valley Community Hospital. He is accepting new patients.

4.2 Star Rating
Based on 17 reviews 4.2 Star Rating (17 reviews)

Natural Medicine and Preventative Health and Heart

1001 E Chapman Ave Ste B Fullerton, CA 92831

Dr. Zamarra is a Healthgrades Choice provider in Cardiology

The Healthgrades Choice designation helps you understand the most important factors to consider when choosing a healthcare professional. This designation is earned based on four set standards.
Read our methodology

  • Above average experience
  • Good hospital quality
  • Good patient ratings
  • No healthcare sanctions

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Dr. Zamarra's Reviews

Likelihood to recommend Dr. Zamarra

4.2
17 ratings, 9 with a written review
5 star
71%
71%
4 star
12%
12%
3 star
0%
0%
2 star
0%
0%
1 star
18%
18%

Your trust is our top concern.

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Telehealth
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What went well
  • I felt respected
  • Listened & answered questions
  • Explained conditions well
  • Appointment wasn't rushed
  • Trusted the provider's decisions
What could be improved
No results
Helpful
Jul 29, 2024
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I was very happy with my new cardiologist
What went well
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
What could be improved
No results
Helpful
Nov 17, 2023
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Great doctor
What went well
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
What could be improved
No results
Helpful
Nov 01, 2023
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Dr. Zamarra was exceptionally helpful in explaining several of the heart issues that were above my limited knowledge!! Outstanding and very insightful to the novice patient like me!
What went well
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
What could be improved
No results
Helpful
Oct 27, 2023
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Excellent provider
What went well
  • Listened & answered questions
  • Explained conditions well
What could be improved
No results
Helpful
Oct 18, 2023
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Dr. Zamarra truly cares about his patients. My mother speaks very little English, but Dr. Zamarra intuitively knows what she needs medically and emotionally. He carefully readjusted my mother’s original prescription from an overseas doctor, and brought health and happiness back to my mother’s life. He is more than a doctor, he is a healer!
What went well
No results
What could be improved
No results
1 other person found this helpful
Helpful
Apr 13, 2019
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Front office is rude and unorganized. Messed up information to the insurance company twice! Office is also a raggedy and combined with a dentist office.
What went well
  • Explained conditions well
What could be improved
  • Office environment
  • Difficult to schedule appointment
  • Staff wasn't friendly
  • Appointment was rushed
  • Long wait times
Helpful
Fullerton, CA – Jan 16, 2019
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I have been a patient of Dr. Zamarra since 2010. He is extremely knowledgeable, and conscientious. He really taked his time with each patient, and really cares about them. His office manager Lori...great personality, wonderful person..always makes you feel comfortable. Iesha is also a wonderful person, very friendly. I wouldn't go anywhere else!
What went well
  • Office environment
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
2 others found this helpful
Helpful
Kimberly J. in Anaheim Hills, CA – Jan 30, 2017
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Dr. Zamarra is an amazing Doctor! He takes the time to truly listen. In addition to be kind and caring, he is an excellent diagnostician. Dr. Zamarra receives my highest recommendation!
What went well
  • Office environment
  • Appointment scheduling
  • Listened & answered questions
  • Explained conditions well
  • Staff friendliness
  • Appointment wasn't rushed
  • Trusted the provider's decisions
  • Wait times
What could be improved
No results
5 others found this helpful
Helpful
Jan Cogan in Fullerton, California – Feb 12, 2016
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About Me

biography

Dr. John Zamarra, MD is a cardiologist in Fullerton, CA and has over 50 years of experience in the medical field. Dr. Zamarra has extensive experience in Adult Congenital Heart Conditions. He graduated from State University of New York at Buffalo...read more
  • Cardiology

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

  • State University Of New York At Buffalo

    Medical School, 1972
American Board of Medical Specialties®
American Board of Internal Medicine®
Cardiovascular Disease
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

  • Spanish

Dr. Zamarra is a Healthgrades Choice provider in Cardiology

    Read our methodology

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    Locations

    Natural Medicine and Preventative Health and Heart

    Natural Medicine and Preventative Health and Heart1001 E Chapman Ave Ste B Fullerton, CA 92831
    1

    Affiliated Hospitals

    • Adventist Health Sonora

      1000 Greenley Rd
      Sonora, CA 95370
      Recipient of 1
      hospital award

      Patient Safety Excellence Award™ (2024)

      Top in the nation for providing excellence in patient safety by preventing infections, medical errors, and other preventable complications

      View all awards

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

      86%
      Patients said they were given information about recovering at home

      2% higher than the national average

      75%
      Patients said that nurses always listened to them and explained things well
      View all patient feedback
    • Bear Valley Community Hospital

      41870 Garstin Dr
      Big Bear Lake, CA 92315
    Learn more about how Healthgrades measures Hospital Quality