Jonathan S Sagum , MD
Diabetes, Endocrinology
Accepting New Patients
4.9 of 5 stars
303 Ratings, 78 Reviews
Presence Saint Francis Hospital
Residency, Internal Medicine, 2009
Southern Illinois University School of Medicine
Fellowship, Endocrinology Diabetes & Metabolism, 2015
University of Santo Tomas
Medical Education, Doctor of Medicine, 1998
4.90 out of 5 4.9 of 5 stars — 303 Ratings, 78 Reviews
The Patient Satisfaction Rating is an average of all responses to the care provider related questions shown below from our survey. Patients that are treated in outpatient or hospital environments may receive different surveys, and the volume of responses will vary by question.
Reviewed on 07/02/2026
Very good.
Reviewed on 07/01/2026
Dr.Sagum is a gem. Very kind, very caring, very knowledgeable.
Reviewed on 06/26/2026
The Dr made sure I had all of concerns addressed.
Reviewed on 06/22/2026
Dr. Sagum is fabulous. He always answers my questions and asks how I feel about the changes in treatment. Dr, sagum is a wonderful doctor.
Reviewed on 06/08/2026
This was an excellent annual review with my Dr. I appreciated our discussion of pertinent matters.
Reviewed on 06/04/2026
Good experience
Reviewed on 05/29/2026
Dr. Sagum is an excellent Endocrinologist.
Reviewed on 05/20/2026
Dr. Sagum is a very good physician.
Reviewed on 05/18/2026
I adore Dr. Saginaw! He's extremely knowledgeable and is ALWAYS on top of things. So glad I was recommended to see him!
Reviewed on 05/01/2026
Clearly provided information. Initiated questions to get my input.
Reviewed on 04/24/2026
Very good service
Reviewed on 04/23/2026
Amazing
Reviewed on 03/25/2026
Very good experience
Reviewed on 03/21/2026
Outstanding in explaining conditions & anticipated symptoms
Reviewed on 02/23/2026
Dr. Sagum always answers my questions and provides reassurance with there is uncertainty.
Reviewed on 02/21/2026
I would 10 out 10 recommend him to others
Reviewed on 02/07/2026
I felt like he listened to my needs and delivered exceptional results
Reviewed on 02/05/2026
I'm very grateful for the support and treatment center
Reviewed on 02/01/2026
All good!
Reviewed on 01/31/2026
Dr Sagum is the best endocrinologist in the city and Greg, his phlebotomist, is awesome. Dr Sagum always listens, gives good advice and follows through on his word.
Reviewed on 01/28/2026
Very efficient
Reviewed on 01/24/2026
Thank you!
Reviewed on 01/23/2026
He went above and beyond to provide me with information that I needed. He made sure I had my next appts scheduled. He called me personally the next day to assure I understood what I needed to do and to thank me.
Reviewed on 01/21/2026
Great doctor
Very good visit
Reviewed on 01/17/2026
A well good provider.
Reviewed on 01/16/2026
Dr. Sagum is always so nice and polite. And always explains everything. Is nurse was awesome!
Reviewed on 01/14/2026
I like this office very much
Reviewed on 01/07/2026
Knowledgeable and caring.
Reviewed on 01/05/2026
Excellent provider and staff!
Reviewed on 01/02/2026
Dr. Sagun was very smart and professional and also very caring and friendly. I had an unusual condition and he dug in to it very deeply to help diagnose me.
Reviewed on 12/15/2025
Very pleased with the quality of care received
Reviewed on 12/13/2025
Very knowledgeable, friendly and professional. Couldn't ask for for more.
Reviewed on 12/11/2025
Dr. Sagum is a very good Dr. He listens when I have a problem with my meds...and we fix it together... I would not want to switch Drs.
Reviewed on 12/07/2025
He is very caring and loving provider.I am totally satisfied about his treatment
Reviewed on 11/26/2025
Best provider
Reviewed on 11/22/2025
He's great!
Dr Sagum is a kind man. He was very respectful, thorough, and is sure to answer any questions I may have. I never feel that he or his staff are rushed during my appointments. I have their full attention during a visit.
He was amazing he was informative he gave details about medical care and medications I've seen several endocrinologists in the past and he is hands down the best I have ever worked with I'm very thankful that he is my doctor for my diabetes care it took years for me to find a doctor as good as he is !
Reviewed on 11/21/2025
Awesome doctor!
Reviewed on 11/15/2025
Wonderful Doctor and staf
Reviewed on 11/08/2025
Dr Sagum very proffional and very nice I you prefer him to everybody
Reviewed on 11/05/2025
Dr. Sagum is a wonderful doctor. He always listens to my concerns and answers my questions. He reviews all my test results and makes good decisions based on all information.
Reviewed on 11/01/2025
Dr Sagum is always very thorough
Reviewed on 10/29/2025
Dr Sagum and staff provide exceptional care.
This was my first time with this provider. He was patient, listen to my questions, explained things very easily, so I understood them. I would recommend him to others.
Reviewed on 10/21/2025
I am 82 years old and have hearing aids and the Dr made sure I heard all he was telling me. He and his office staff were very helpful and polite.
Reviewed on 10/20/2025
Dr. Sagum and his staff were and have been the utmost professional people in the treatment of my medical care.
Reviewed on 10/18/2025
Good physician. Good office staff. I would highly recommend them to family.
Great
Reviewed on 10/14/2025
Doctor Sagum is a great doctor and he cares about my health thank you
Reviewed on 10/04/2025
Dr Sagum has always taken care of my medical needs. He is very professional. He genuinely cares and it shows. His entire staff work well together. I am very happy to have him and his staff as my medical team.
Reviewed on 10/03/2025
Love him!
Reviewed on 10/02/2025
Very thorough
Reviewed on 09/29/2025
Good visit
Reviewed on 09/27/2025
Dr. Sagum is a wonderful doctor. I see him once a year so that he can order a blood test - checking thyroid levels. If the levels aren't 'correct,' he will change the dosage levels.
Reviewed on 09/22/2025
Dr Sagum is excellent. He listens & is knowledgeable about my case. Sarah who was the nurse during my appointment was excellent & made me feel good.
He went over my medications and my test results in detail.
Reviewed on 09/20/2025
Good service
Reviewed on 09/12/2025
Muy buena la atenci?n
Reviewed on 09/08/2025
Dr gave shots done a great job with my knees.
Reviewed on 09/06/2025
Dr. Sagum is an excellent care provider!
Reviewed on 09/04/2025
He's very knowledgeable and he knows what he's doing. I'm glad I choose him.
Reviewed on 09/03/2025
Excellent Dr. Great staff
Reviewed on 08/30/2025
A good provider.I
Reviewed on 08/25/2025
Love Dr Sagum. He is well informed about my status and always willing to answer any questions I have!
Reviewed on 08/23/2025
Really like doctor Sagum takes time to explain and let's you have input
Reviewed on 08/22/2025
Constance, the person I spoke to for scheduling the appointment was very nice and efficient. Dr. Sagum was polite, friendly and explained/answered any questions or concerns I had.
Reviewed on 08/16/2025
I believe Doctor Sagum is an outstanding Doctor
Reviewed on 08/14/2025
He is very knowledgeable and polite.
Reviewed on 08/13/2025
Dr Sagum is always so pleasant and he always great about answering my chart questions.
Reviewed on 08/09/2025
Dr.Sagum was incredible. Very knowledgeable and thorough 10/10 always
Kind. Very smart. Friendly
Reviewed on 08/08/2025
Very professional and informative
Reviewed on 08/07/2025
Nothing they are so kind and very very polite I'm great full how nice they all are to me
Excellent doctor
Reviewed on 08/06/2025
I believe Dr. Sagum truly cares about my health!
Reviewed on 08/04/2025
Dr Sagum greeted me in the waiting room and took me back and performed my weight and blood pressure check as well as my appointment. When I asked him about his nurse he told me he had a new patient and she was busy. He is so kind, thorough, and human. I absolutely had the best experience with him. Endocrinology is a very difficult area and he really breaks it down into manageable conversations. A++++ would highly recommend him!
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