Our Quality

Quality is an issue that everyone is interested in, but is sometimes hard to quantify in the field of medicine. How do you determine if you will receive quality medical care from a specialist?

One place to start, when choosing a specialist, is to ask your primary care physician who he or she would recommend. You might also want to learn about the specialist's knowledge and experience, his safety record for procedures, and his qualifications. Finally, you can ask other healthcare workers and friends about their experiences with a specialist.


About Dr. Zachary

Fellow - American College of Gastroenterology Diplomate - American Board of Internal Medicine

Dr. Zachary is Board Certified by the American Board of Internal Medicine in both Internal Medicine and Gastroenterology.

He participates in Continuing Medical Education and regularly attends regional/national meetings to stay up to date on medical advances. Although he no longer practices Internal Medicine, he keeps his certificate current to better understand his patient’s other medical problems and how they might interact with their current gastrointestinal problems.

Dr. Zachary has been practicing Gastroenterology since 1991. During that time he has provided care for thousands of patients, as well as performed over 1,000 procedures each year.

Measures of Quality

In the last few years, quality measures for colonoscopy have been proposed by the American Society of Gastrointestinal Endoscopy, the American College of Gastroenterology and the American Gastroenterological Association. Some of the more important quality measures are: cecal intubation rates (How often is successful complete examination of the colon achieved?), cecal withdrawal times (How careful is the examination?), and adenoma detection rates (How often are adenomas/precancerous polyps found?). Because of Dr. Zachary’s desire to provide quality care, he began keeping accurate statistics in July, 2010. From July, 2010 through December, 2016, Dr. Zachary’s quality measures for colonoscopy were as follows.

Dr. Zachary Proposed Standards
Cecal Intubation 98.4% ≥ 90%
Cecal Withdrawal Time 6.53 min. ≥ 6 min.
Adenoma Detection Rate 36.7% (43.1% M, 31.8% F) ≥ 25% M, ≥ 15% F

Measures of Safety

Safety is also an important part of quality. Complications are always an inherent risk of performing procedures. During the same measuring period above, in which Dr. Zachary performed over 9,100 procedures, the perforation rate for colonoscopy was 0.05% and for upper endoscopy was 0.03%. The bleeding rate following colonoscopy was 0.16% and following upper endoscopy 0.03%.

More about Dr. Zachary


About Mandi Barnes, FNP-C

Mandi Barnes joined Manhattan Gastroenterology in 2015. She is a Board Certified Family Nurse Practitioner. She worked in a nine physician gastroenterology practice for five years in Springfield, Missouri, before joining Manhattan Gastroenterology. While in Springfield, she helped gather and calculate quality measures for their gastroenterology practice and provided care for all types of gastrointestinal disease. She keeps current in Continuing Medical Education for her discipline.

More about Mandi Barnes