Dr. John Sun, MD
New Patients

Dr. John Sun, MD


Colon & Rectal Surgery | Male


Dr. John Sun, MD is a colon & rectal surgery doctor who practices in Parker, CO. He is 60 years old and has been practicing for 27 years. Dr. Sun is affiliated with Rose Medical Center and Parker Adventist Hospital.

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Dr. Sun's Experience

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Conditions Treated

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    Visiting Dr. Sun

    Dr. Sun accepts 6 insurance carriers

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    Dr. Sun's Reviews

    Likelihood of recommending Dr. Sun to family and friends
    based on 43 total surveys (12 with reviews)
    Dr. Sun's Performance
    • Trustworthiness
    • Explains condition(s) well
    • Answers Questions
    • Time well spent
    Office & Staff Performance
    • Scheduling
    • Office environment
    • Staff friendliness
    • Average wait time
      10 to 15 minutes
    Patient Reviews (12)
    in Strasburg, CO |
    Dr. Sun is an outstanding surgeon. My condition required an initial surgery and two followup biopsies. I experienced very little pain as Dr. Sun is very good with pain management. Dr Sun is easy to talk with and shows concern for his patients. I would recommend him to family or friends if they needed surgery.
    in Kiowa, CO |
    The best Dr and surgeon. Listens to the patient plus takes his time explaining procedures with ease.
    in Aurora, CO |
    Clear, to the point, friendly, excellent surgeon. I had an excellent experience with Dr. Sun and his staff. I will visit again and recommend his office to others.
    in Elizabeth, CO |
    Attitude, patient approach, straight-shooter. All qualities I look for in an expert.
    in Denver |
    Thank you, Dr. Sun for fixing my medical issues with grace, knowledge, expertise and wisdom. The "end" result was "endcredible"!
    in Littleton, CO |
    The miracle worker of my life. I love Dr. Sun and he saved my life! So knowledgeable; so friendly; so nurturing. You could not ask for anymore from a surgeon!
    in Englewood, CO |
    The miracle worker of my life. I love Dr. Sun and he saved my life! So knowledgeable; so friendly; so nurturing. You could not ask for anymore from a surgeon!
    in Denver, CO |
    In 2006 I was a 53 year old woman who was experiencing prolapse and poor function of the rectum. Dr Sun and Dr Aguirre reconstructed the prolapsed parts in the rectum and vaginal areas. I was terrified of pain potential and discomfort, but was pleased that this was managed very well. The surgery was a great success and 10 years later I am in very good condition.
    in Parker, CO |
    Excellent experience. Face it rectal surgery is not fun and it is embarrassing, but Dr. Sun and his staff really take good care of you and takes the awkwardness out of the situation. His work is excellent and he uses the latest pain management (exparel) that keeps you pain free during the 3 days following surgery. Normally post op pain is excruciating. All the way around, if you need hemorrhoid surgery, Dr Sun should be your first choice.
    in South Fork, CO |
    We carefully researched for a doctor who had knowledge of and experience operating on pilonidal cysts for our 19 year old son. Dr. Sun was very knowledgeable and experienced with pilonidal disease. He spent time explaining what was going on and how he would operate (doing a modified Bascom procedure) prior to the surgery. We are almost a month post op and have absolutely nothing but positive things to say about Dr. Sun and the procedure. We highly recommend Dr. Sun and his staff.
    in Aurora, CO |
    After procrastinating for way too long, I finally decided to get a colonoscopy. My Primary Care Physician recommended Dr. Sun and I'm so glad he did! Not only was Dr Sun very personable, his staff was wonderful. Their recommended method for prep (colon cleanse) was actually far easier than I expected. Dr. Sun and his team were very good to answer all my questions, and the process was a piece of cake!
    in Parker, CO |
    Been a patient of Dr. Sun for the past couple of years and couldn't be happier. Not only is he friendly and generous with his time, he is a consummate professional. After my most recent colonoscopy, he identified a concerning adenoma and provided me with a range of options. Understanding my immediate reaction, he calmly and clearly explained the risks and opportunities for a favorable outcome. I followed up with Dr. Sun to have laparoscopic surgery to remove my appendix. Thanks Dr. Sun!
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    Dr. Sun's experience matches your search based on the following criteria:

    •  Based on total number of patients treated over the last 12 months
    •  Specializes in Colon & Rectal Surgery
    •  Board certified in Colon & Rectal Surgery and General Surgery
    •  No malpractice claims found
    •  No sanctions found
    •  No board actions found

    Awards & Recognition

    • Awards & Honors
      • Healthgrades Honor Roll
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    • Media & Publications

      Dr. Sun has no media or publications listed.

    Background Check

    • 0
      Malpractice Claims

      No malpractice history found for Colorado.

      What is medical malpractice
    • 0

      No sanctions history found for the years that Healthgrades collects data.

      What is a sanction or disciplinary action
    • 0
      Board Actions

      No board actions found for the years that Healthgrades collects data.

      What are board actions

    Board Certifications

    Why It Matters: Dr. Sun's Board Certifications

    Board certification should be one of your top considerations when choosing a doctor. Board certification is an official recognition given to doctors who have met specific requirements set by national medical specialty boards in the... More

    • Colon & Rectal Surgery
    • General Surgery

    Conditions Treated

    • Abdominal Disorders
    • Abscess
    • Anal Disorders
    • Anal Fissure
    • Anal Fistula
    • Anal Prolapse
    • Anal and Rectal Cancer
    • Anal or Rectal Pain
    • Anorectal Abscess
    • Cancer
    • Carcinoma in Situ
    • Colorectal Cancer
    • Constipation
    • Crohn's Disease
    • Gastrointestinal Diseases
    • Hemorrhoids
    • Inflammatory Bowel Disease
    • Intestinal Abscess
    • Intestinal Obstruction
    • Rectovaginal Fistula
    • Secondary Malignancies
    • Ulcer
    • Ulcerative Colitis


    • Medical School
      University Of Colorado

      Graduated in 1990

    • Internship Hospital
      University Co

      Completed in 1991

    • Residency Hospital
      University Of Colorado
    • Fellowship Hospital
      University Of Minnesota Hospitals and Clinics

    Languages Spoken

    • English
    • Korean

    Memberships &
    Professional Affiliations

    Dr. Sun does not have any memberships or affiliations listed. If you are Dr. Sun and would like to add memberships or affiliations, please update your free profile.


    • Colon & Rectal Surgery

    Procedures Performed

    • Abscess or Fluid Incision and Drainage
    • Appendectomy, Laparoscopic
    • Appendectomy, Open
    • Colectomy
    • Colon and Rectal Surgery
    • Colonoscopy, Proctosigmoidoscopy, and Sigmoidoscopy
    • Dressing and-or Debridement of Wound, Infection, or Burn (incl. Negative Pressure Wound Therapy)
    • Enterostomy (Laparoscopic or Open)
    • Fistulectomy or Fistulotomy, Anal
    • Gastroenterology Procedures
    • Hemorrhoidectomy or Excision of Anal Tags
    • Hernia Repair
    • Intestinal Transplant (incl. Enterectomy)
    • Laparoscopic Surgical Procedure
    • Laparotomy
    • Open Incisional and-or Ventral Hernia Repair
    • Proctectomy, Open or Laparoscopic (incl. Swenson and Duhamel Procedures)
    • Removal or Destruction of Rectal or Intestinal Tumor (incl. Colonoscopy, Proctosigmoidoscopy, Sigmoidoscopy and Control of Hemorrhage)
    • Repair of Anal and Rectal Defects (Anoplasty, Repair of Imperforate Anus, Sphincteroplasty, Rectal Graft)