Stephen K. Buto, M.D.

Long-Term Risks of Untreated Acid Reflux
posted: Feb. 23, 2026.

Patients seeking digestive care at Stephen K. Buto, M.D. in Honolulu, HI, often ask whether chronic acid reflux is something that can be ignored if symptoms feel manageable. Acid reflux, Read more
Gastroenterologist Tips for Improving Gut Health
posted: Jan. 06, 2026.

Gut health plays a central role in digestion, immune function, and overall well-being. Patients often associate digestive care only with illness, but proactive habits can support a healthier gastrointestinal system Read more
How Gastroenterologists Detect Polyps During Colon Cancer Screening
posted: Jan. 04, 2026.

Early detection remains one of the most effective ways to reduce the risk of colon cancer. During colon cancer screening, identifying and evaluating polyps allows physicians to intervene before serious Read more
Colonoscopy Prep Mistakes to Avoid: Gastroenterologist Tips
posted: Jan. 02, 2026.

Dr. Stephen K. Buto, M.D. in Honolulu, HI emphasizes that a successful colonoscopy starts well before the procedure itself. Proper preparation allows for clear visualization of the colon and accurate Read more
Pediatric Digestive Problems and the Gastroenterologist’s Role
posted: Dec. 31, 2025.

Dr. Stephen K. Buto, M.D. works closely with families in Honolulu, HI when digestive symptoms begin to interfere with a child’s comfort, growth, or daily routine. Pediatric digestive problems often Read more
Upper Endoscopy vs. Other Diagnostic Tests: Understanding the Differences
posted: Dec. 29, 2025.

Digestive symptoms such as persistent heartburn, difficulty swallowing, unexplained abdominal pain, or chronic nausea often require more than basic testing. At the practice of Stephen K. Buto, M.D. in Honolulu, Read more
Colonoscopy and Age: When and How Often Should You Get Screened?
posted: Oct. 29, 2025.

Colorectal cancer is one of the most preventable and treatable forms of cancer—when detected early. One of the most effective ways to catch it in time is through a colonoscopy, Read more
Common Reasons Your Doctor May Recommend an Upper Endoscopy
posted: Jun. 18, 2025.

When it comes to getting to the root of digestive issues, sometimes symptoms only tell part of the story. That’s where diagnostic tools like upper endoscopy come in—offering a closer Read more
The Importance of Colon Cancer Screening: Why a Colonoscopy Is Key to Early Detection
posted: May 06, 2025.

Colon cancer is one of the most preventable and treatable cancers when detected early. Regular screenings, particularly colonoscopies, are essential for identifying colon cancer in its earliest stages, often before Read more
How to Tell If Your Heartburn is Serious and Requires Medical Attention
posted: Mar. 03, 2025.

Heartburn is a common condition that many people experience occasionally, often after a large meal or certain trigger foods. However, when heartburn becomes frequent or severe, it may signal a Read more
Upper Endoscopy vs. Colonoscopy: Key Differences Explained
posted: Dec. 24, 2024.

Your gastrointestinal system has several organs that work together, such as your stomach, spleen, intestines, and liver. Therefore, if you have issues with either part of your system, you may Read more
How a Gastroenterologist Can Help Treat Chronic Heartburn
posted: Nov. 15, 2024.

Heartburn is a common issue, and many people find that over-the-counter antacids simply aren’t enough to control the condition. If you live in or near Honolulu, HI, and heartburn is Read more
Colonoscopy 101: What You Need To Know Before the Procedure
posted: Aug. 08, 2024.

A colonoscopy is a diagnostic procedure performed by a gastroenterologist. It is used to view the inside of your colon, to check for abnormalities like polyps and other growths, and Read more
Common Symptoms That Require a Visit to a Gastroenterologist
posted: Aug. 06, 2024.

When it comes to your digestive health, knowing when to see a gastroenterologist can make all the difference. Do you experience persistent abdominal pain, bloating, or discomfort that won’t go Read more
Are You Dealing With Acid Reflux?
posted: May 20, 2024.

If you're dealing with heartburn that keeps you awake at night or noticing other signs of acid reflux, it's important to work with a qualified healthcare professional who can help Read more
Understanding Upper Endoscopy: Uses, Benefits, and Risks
posted: Apr. 04, 2024.

An endoscopy is a medical procedure where a flexible tube with a tiny camera is inserted into your body to examine internal organs. It's typically performed to diagnose digestive problems, Read more

Our Location

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Hours of Operation

Our Regular Schedule

Stephen K. Buto, M.D.

Monday:

9:00 am-12:00 pm

2:00 pm-4:30 pm

Tuesday:

9:00 am-12:00 pm

2:00 pm-4:30 pm

Wednesday:

9:00 am-12:00 pm

Thursday:

9:00 am-12:00 pm

2:00 pm-4:30 pm

Friday:

9:00 am-12:00 pm

2:00 pm-4:30 pm

Saturday:

Closed

Sunday:

Closed

Patient Testimonials

"Thank you very much for your efficient and professional caring to take care of my colon health."

A.K.
"Thank you so much for taking the time to meet with me to address my concerns and to perform the procedures. Your warm bedside manner and compassion were greatly appreciated! I am very thankful to have someone so thorough investigating my symptoms. Thank you!!!"

E.I.
"Many thanks for a job well done. It was a huge relief going through the ordeal. Your easy going, soft sell of the procedure was a big help. It helped to put things in perspective and allowed me to be less apprehensive. Your efficient team worked swiftly and well. We are fortunate to have such up-to-date facilities and trained staff. We are very fortunate to have such fine medical care."

R.L.
"Thank you for the extra special care you gave my dad during his recent gall bladder episode. My family and I truly appreciate your attention to dad’s case, your kindness, compassion, thoroughness, being there in the middle of the night, communication with the family, and just the heart with which you serve. I wish there were more doctors like you. God bless and keep you and your family."

L.N.S.
"I can’t thank you enough for the extraordinary effort you went through to help me reach a conclusive diagnosis. You went over and beyond any expectation, and I thank you from the bottom of my heart for all the time and effort. My mind is at ease that I had the expertise of you and your colleagues to help me."

J.T.
"Thank you for service above and beyond on a long Saturday afternoon, when my husband was in so much pain. It was very comforting to know that you were just a phone call away. We needed your instructions and advice, and it kept him from a hospital stay."

C.S.
"Thank you for your wonderful expertise and care."

J.H.
"It has been one week since my first colonoscopy. Thank you so much that the entire process and procedure went so smoothly. The time and effort in providing a thorough pre-consultation and explanation relieved me of my anxiety and concerns. The communication and follow through by your office was very helpful and appreciated! I sincerely appreciate your kind attention and excellent medical care in the successful accomplishment of my procedure"

J.S.
"Thank you so much for your attentive and thorough care. I appreciate your acknowledging my anxiety over the anesthesia. And your attempt to alleviate it. It worked beautifully!!!"

J.I.
"I have had my second procedure with Dr. Buto and Dr. Leong in 10 years. They and their staff were the most professional and courteous people that I have ever met. Everything was explained to me as to what was going to happen for prep, the procedure and after the procedure. I would highly recommend Dr. Buto, Dr. Leong and their staff."

J.M.