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About Me

Experience

Education

University of the East, Ramon Magsaysay Medical Center, Quezon City, Philippines, Medical School

Residency

Wright State University, Dayton, OH, Internal Medicine

Certifications

American Board of Internal Medicine

Reviews

We value patient feedback and are committed to providing you with information, so you can make informed decisions about your health care, physicians and other providers in your care journey. Patient ratings and comments are gathered from the post-visit experience survey. Learn more.

September 24, 2025
Dr.Olegario is very thorough and explains everything very well. Nursing staff is great and always compassionate to my needs.
September 24, 2025
Dr. O was able to fit me in on the spur of the moment. I appreciated that. He.is so thorough explained everything so well. He had the utmost consideration for my well-being.
September 23, 2025
The doctor was very thorough and provided good information.
September 18, 2025
Everyone at the clinic that we came in contact with were great. Love the smiles that get returned. Great bunch of workers
September 10, 2025
Very thorough coverage of all test results. Very good plan for future care. An absolutely great experience. Took the time to go over everything plus answer any questions that I had!
September 07, 2025
Dr. Olegario's clinic is always the very best!
September 04, 2025
Explained well
August 30, 2025
Dr. Olegario is very thorough and unhurried. I appreciate that.
August 22, 2025
I have always had very good care with Dr. Olegario, which is why I have not found another PCP here in Sioux Falls and I choose to drive back-and-forth to see my doctor because I trust him and he's always done right by me
August 17, 2025
Very thorough and gracious. I felt valued and heard
August 16, 2025
Dr Olegario is very professional and explains everything very well. I feel like I get very good care from him. He shows real concern for issues and encourages me to be healthier.
August 14, 2025
Recommend only if asked
August 13, 2025
Dr. Oligario is always very thorough in explaining my current conditions, tests and treatment. He does a wonderful job.
August 10, 2025
Dr Olegario is very thorough in explaining I lab results.He listens and answers my concerns.He is kind and nice.
August 06, 2025
I would recommend dr. Olegario
August 01, 2025
I feel very informed & safe
July 28, 2025
Very good experience.
July 25, 2025
We are very impressed with Dr. O and his staff. They always go above and beyond!!!
July 20, 2025
Very good
July 09, 2025
As always, Dr. John always explains everything.
July 09, 2025
This care provide shows great interest in my care
July 03, 2025
Excellent care
July 03, 2025
Dr Olegerio is an excellent Doctor always explains everything and I always appreciate his knowledge of my medical history and takes the time to go over everything!
June 29, 2025
I always recommend my clinic
June 20, 2025
Dr. Oligario is an exemplary physician. He explains things in a manner for easy comprehension in a caring manner.
June 13, 2025
The doctor is always professional and thorough. He explains everything well.
June 04, 2025
Outstanding
June 01, 2025
Dr. Olegario is the most thorough physician I have ever been to. He spends more than enough time with me, discussing my health and options for treatments. He listens and actually hears what I am saying. I recently told a friend that even if I moved out of state I'd want to stay on with him.
May 25, 2025
I have referred him to numerous family and friends over the past 10 to 15 years
May 15, 2025
I'm grateful to have the doctor I have. He takes time to listen, answer questions and I feel he concerned about my health and as a person. Thank you
May 09, 2025
All care providers are professionals.
April 27, 2025
Good
April 23, 2025
Dr Olegario is an amazing doctor. He takes as much time as needed. Really cares about my wellbeing
April 16, 2025
Dr. Olegario is the best. We are fortunate to have him at Avera Queen of peace.
April 13, 2025
Dr Olegario is very good at explaining my conditions and why he recommends the treatment he does. He takes the time to answer my questions.
March 29, 2025
It was great that I got in to see Dr Olegario
March 27, 2025
Dr. Olegario is the best
March 27, 2025
Dr Olegario is very caring
March 12, 2025
Everyone did a great job
March 10, 2025
Very pleased with Doctor Olegario, have gone to him for a long time. Very good about listening to my concerns.
March 09, 2025
Dr.John is always pleasant and totally covers all questions.
March 09, 2025
The nurses did their job very well.
February 27, 2025
All good.
February 08, 2025
Very thorough
February 06, 2025
Dr Olegario was very thorough explaining results
January 25, 2025
Dr Jon was very accommodating to work me in at the last minute
January 24, 2025
Nice, well cared informed
January 24, 2025
They seemed genuinely interested about my concerns
January 23, 2025
Dr Jon is amazing. He spends time listening to all my questions/concerns. He gives very good examples and knowledge about my health.
December 25, 2024
Dr O is always great
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Directory Disclaimers

This directory contains information about the provider members of Independent Health Care Associates, Avera Health and all Avera entities, members of the Avera Medical Group, and employed select providers with Avera McKennan, Sioux Falls, SD and Avera Marshall, Marshall, MN and physicians with hospital privileges at Avera St. Luke's, Aberdeen, SD; Avera Sacred Heart, Yankton, SD; Avera Queen of Peace, Mitchell, SD; Avera St. Mary's, Pierre, SD.

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