Dr. Samuel H. Iwata, MD

Dr. Samuel H. Iwata, MD

Gastroenterology | Male | 63 years old

69 reviews| Leave a review

Learn about this doctor

Care Philosophy

Dr. Iwata specializes in Gastroenterology and practices in Colorado Springs, CO. He practices at 2 locations.

Are you Dr. Iwata? Add your own statement here.

Read more

Dr. Iwata's Experience

Experience Match

See how Dr. Iwata's experience matches your preferences.


For the best healthcare for your needs, choose a doctor who specializes in your medical condition.

Board Certifications

Board certification indicates that a doctor is highly qualified in the medical field in which they practice.

Conditions Treated

Check to see that this provider treats your medical condition.

Procedures Performed

Check to see that this provider performs the procedure that you need.

Background Check

Check to see if your provider has any malpractices, board actions, or sanctions.


Learn more about where this provider went to medical school, residency, and more.

Awards & Recognition

View information about special awards and recognition for this provider.

Languages Spoken

Check to see what languages this provider and/or staff speak.

Memberships & Professional Affiliations

View memberships and affiliations associated with this provider.

Visiting Dr. Iwata

Dr. Iwata accepts 9 insurance carriers

Affiliated Hospitals

Hospital Quality

Check out the quality of care at the 1 hospitals where Dr. Iwata has admitting privileges.

Hospital Quality Awards


Dr. Iwata's Reviews

Likelihood of recommending Dr. Iwata to family and friends
based on 69 total surveys (44 with reviews)
Key Survey Insights
  • Trustworthiness
  • Helpfulness
  • Staff
  • Scheduling
Experience with Dr. Iwata
  • Level of trust in provider's decisions
  • How well provider explains medical condition(s)
  • How well provider listens and answers questions
  • Spends appropriate amount of time with patients
Dr. Iwata's Office & Staff
  • Ease of scheduling urgent appointments
  • Office environment, cleanliness, comfort, etc.
  • Staff friendliness and courteousness
  • Total wait time (waiting & exam rooms)
    10 – 15 minutes (65)
Open Full Survey+
in Monument, CO |
Dr. Iwata and the staff are incredibly professional, kind, respectful and friendly! They answered all my questions while preparing me for my procedure and didn't skip a beat! It's obvious those folks love what they do and work quite well together as they dance around each other to get the job done! I have some anatomical challenges that made me a little fearful of this procedure, but Dr. Iwata found no obstacles throughout and listened very closely to my concerns! Great Experience & outcome!
in Colorado Springs, CO |
Don't trust this guy. He is either a liar or stupid, and I don't think he is stupid. He seems to think an unsedated colonoscopy is "just a little uncomfortable" which is just wrong. It's painful. Not broken bone painful, but way past "a little uncomfortable."
in Monument, CO |
Dr. Iwata was very cordial and shared the procedure process before beginning and the results after the procedure in good detail. He built confidence explaining his experience.
in Colorado Springs, CO |
Calming, assured, confident.
in Colorado Springs, CO |
Dr, Iwata is so kind and professional.
in colorado springs, co |
This jerk lied to me when he told me that the colonoscopy he was about to perform would be, at the most, "A little uncomfortable." He said it 4 times. Total bull. This proceedure is painful. Level 3 to 5 painful. So Iwata is either stupid, or a liar. Either way, don't trust this liar. He also lied about the seriously negative effect the colonoscopy would have on my hemorrhoids. He ignored my concerns and caused me significant pain & suffering. It took 4 more painful proceedures to fix.
in Colorado Springs, CO |
Dr Iwata was very thorough in ascertaining my needs for requesting the tests that my primary physician ordered. He then was able to share with me his opinions on my needs and discuss with me his reasoning and best practices. He listened well and was not hurried during the consult . My questions were respected and given thoughtful replies. Ultimately I felt very confident about the decisions reached and my impending procedure.
in Divide, CO |
Caring, thorough, expert.
in Monument, CO |
Dr. Iwata is a very caring physician. He describes the procedures well and very cautious regarding his careplan making sure all issues are addressed appropriately.
in Colorado Springs, CO |
Dr Iwata explains everything very clearly so that I can understand exactly what is happening and what the results are. He always answers my questions.
in Colorado Springs, CO |
I have been fortunate enough to have had Dr. Iwata a couple of times throughout the last few years and would not have wanted anyone else. He makes you comfortable and makes sure you understand everything. Never makes you feel like he is in a hurry.
Charlotte, NC |
Dr. Iwata is great!!!
in Colorado Springs, CO |
I have been a patient of Dr. Iwata for six or seven years. I have been impressed with Dr. Iwata and his staff since day one. The quality of service and professional care I have received is the best. I have been recommending Dr. Iwata and his staff you years, and recommend this facility to everyone.
Colorado Springs, CO |
Dr Iwata is interested in you. He asks about any issues or questions you have, then discusses them with options for you without putting you down.
Monument, CO |
Everyone at GACS is pleasant and works to bring an unpleasant procedure to a quick end.
in Colorado Springs, CO |
Dr. Iwata has been in this field for years, and has much experience.
in Colorado Springs, CO |
Don't trust this guy. I checked his credentials and almost nothing checked out. His "medical school" never heard of him.
in Monument, CO |
in Colorado Springs, CO |
Very friendly and efficient practice.
in Penrose, CO |
Excellent care ! Dr Iwata explained procedure and was very pleasant. Would definately reccomend him to friends and family.
in Colorado Springs, CO |
I am very satisfied with Dr. Iwata's bedside manners. He informed me of the procedure and what to expect. The procedure went very well. After the procedure Dr. Iwata explained to me what he found and told me when I should schedule my next procedure.
in Colorado Springs, CO |
The procedure was smooth and pain free. All of the staff at the center were great. Over all a great experience for what it is. I mean nobody like to get medical procedures done.
in Colorado Springs, CO |
I have been seeing Dr. Iwata for many years. He is the only one I would trust with my gastro health, and I'm not kidding. Over the years I have observed his dedicated approach to his craft and have been impressed with him at every visit. I have always found him to be friendly, cordial, and very professional. I believe I do not have colon cancer today because of the care and advice I have been given by Dr. Iwata and his staff. He and his organization come highly recommended.
Colorado Springs, CO |
Dr. Iwata exudes confidence about his treatment of the patient. Very competent and friendly.
in Colorado Springs, CO |
Digestive issues can be very confusing, scary and PAINFULL for us patients. My prior GI labeled all my issues as Gastroparesis and sent me on my way to fend for myself. Dr. Iwata listened to me when I was describing my symptoms and is helping me dig deeper to get some relief from my major issues. I really appreciate all of his years of experience and him helping me to improve my quality of life.
in Colorado Springs, CO |
Dr Iwata is a very efficient friendly Doctor. We were so impressed with the prodecure he did on my husband
in Colorado Springs, CO |
I've had the pleasure of being treated by Dr Iwata and his team twice (2013 and 2016). No problems, very responsive and Knowledgeable. I will use Dr Iwata again in four years without hesitation. I have and will continue to refer his excellent service to family and acquaintances. Thank you Dr Iwata.
in Colorado Springs, CO |
I was very disappointed with the staff and Dr. Iwata. My phone calls were not returned. Wait times of 30 and 40 minutes were routine. Dr. Iwata seemed annoyed and distracted. He didn't really answer our questions honestly, or he didn't know what he was talking about. We will never return.
We are very sorry you had a bad experience. If you would like to discuss this further please feel free to call our office and ask for the practice administrator as she is always looking for feedback and ways to improve in any way.
in Colorado Springs, CO |
Dr. Iwata is awesome. He is very friendly, very professional, and caring and sensitive to my needs. I've see n him for probably 20 years and my opinion has never waivored.
in Colorado Springs, CO |
I have known Dr Iwata for years while I practiced in town. He has always been trustworthy dealing with my referrals and in turn in my own care.
in Woodland Park |
Had a scope done. Staff and doctor were great.
in Colorado Springs, CO |
He is always gentle and explains all procedures before he starts
in Colorado Springs, CO |
Very professional and kind
in CO |
I've send Dr Iwata a few times. He is vey. thorough and engages with patients in a way most doctors do not. He's seeks your buy in with a course treatment...
in Colorado Springs, CO |
Very good bed side manner, very caring and didn't seemed rushed
in Colorado Springs, CO |
Outstanding service! Dr Iwata and every member of the team were friendly, communicated status and results in patient-friendly language, and never made communication seem rushed. The post-procedure coffee choices are an awesome touch from the "bottoms-up café!" Thanks for exceptional support.
in Monument, CO |
I have been examined and treated by Dr. Iwata for intestinal polyps several times and am very satisfied with his competence and care.
in Colorado Springs, CO |
Very impressed with Dr Iwata and his staff. Very knowledgeable and thorough explanations of procedures and results. This office is on time and efficient.
in Colorado Springs, CO |
After probably 10 colonoscopies and a few other specific events, I, unequivocally, trust Dr Iwata with my medical needs in this area of my health.
in Monument, CO |
Dr. Iwata was kind, supportive, professional, and encouraging. I could not ask for a better experience than he and his staff provided. I will definitely return to his office for care and will refer friends and family to him as well.
in Eads, CO |
My experience with Dr. Iwata and his staff was very positive. I just retired from a career in healthcare so I am familiar with the way a clinic should be run and I was pleasantly impressed. My wait time was not long and the staff was friendly and helpful. The prep procedure was not as bad with this colonoscopy as it was with the one I had 10+ years ago.
in Monument, CO |
Professional, caring and a good sense of humor too!
in Colorado Springs, CO |
Very caring and knowledgeable team. Enjoy my visits with the doctor and his team.
in Colorado Springs, CO |
A great experience with Dr. Iwata. I found him to be an outstanding Dr. and I would recommend him for sure to anyone that needs a doctor.
Have you seen Dr. Samuel H. Iwata, MD?

Dr. Iwata's experience matches your search based on the following criteria:

  •  Based on total number of patients treated over the last 12 months
  •  Specializes in Gastroenterology
  •  Board certified in Gastroenterology and Internal Medicine
  •  No malpractice claims found
  •  No sanctions found
  •  No board actions found

Awards & Recognition

  • Awards & Honors
    • Healthgrades Honor Roll
    What is a recognized doctor
  • Media & Publications

    Dr. Iwata 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

Background Check

Why It Matters: Dr. Iwata'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

  • Gastroenterology
  • Internal Medicine

Conditions Treated

  • Abdominal Disorders
  • Abdominal Pain
  • Anal or Rectal Pain
  • Anemia
  • Autoimmune Diseases
  • Barrett's Esophagus
  • Benign Neoplasm of the Digestive System
  • Benign Tumor
  • Blood Disorders
  • Cancer
  • Celiac Disease
  • Cholecystitis and Gallstones
  • Cirrhosis
  • Colorectal Cancer
  • Constipation
  • Crohn's Disease
  • Diaphragmatic and-or Hiatal Hernia
  • Diarrhea
  • Diverticulitis, Intestinal
  • Diverticulosis, Intestinal
  • Duodenal Ulcer
  • Duodenitis
  • Dysphagia
  • Enteritis
  • Esophageal Achalasia and Cardiospasm
  • Esophageal Diseases
  • Esophageal Ulcer
  • Esophageal Varices
  • Esophagitis
  • Gas-Bloat Syndrome
  • Gastric Ulcer
  • Gastritis
  • Gastroesophageal Reflux Disease (GERD)
  • Gastrointestinal Bleeding
  • Gastrointestinal Diseases
  • Gastrointestinal Malabsorption
  • Gastroparesis
  • Heartburn
  • Hemochromatosis
  • Hemorrhoids
  • Hepatitis B - Immune Response
  • Hernia
  • Indigestion
  • Inflammatory Bowel Disease
  • Intestinal Obstruction
  • Irritable Bowel Syndrome
  • Lactose Intolerance
  • Liver Damage from Alcohol
  • Nausea
  • Non-Alcoholic Fatty Liver Disease
  • Noninfectious Gastroenteritis and Colitis
  • Pancreatitis
  • Reflux Esophagitis
  • Stomach Cancer
  • Stomach Diseases
  • Stomach and Small Intestine Cancer
  • Ulcer
  • Ulcerative Colitis
  • Unexplained Weight Loss
  • Vascular Insufficiency of Intestines
  • Vomiting Disorders


  • Medical School
    University of Colorado At Denver

    Graduated in 1979

  • Internship Hospital
    Maricopa Co Med Center

    Completed in 1980

  • Residency Hospital
    Maricopa Co Med Center

    Completed in 1982

    University NM

    Completed in 1984

  • Fellowship Hospital
    University of New Mexico / Main Campus

    Completed in 1984

  • Undergraduate School
    University Of Colorado

    Graduated in 1973

Languages Spoken

  • English

Memberships &
Professional Affiliations

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


  • Gastroenterology

Procedures Performed

  • Colonoscopy, Proctosigmoidoscopy, and Sigmoidoscopy
  • Endoscopy (Esophagus, Stomach, Small Intestine)
  • Gastroenterology Procedures
  • Liver Biopsy
  • Manometry
Filter Your Results
Clear All