Mark Johnson, MD
Endocrinology
MercyOne North Iowa Diabetes, Endocrinology and Weight Loss
910 N Eisenhower Ave.
Mason City, IA 50401 Directions
4.9 out of 5
85 verified ratings
85 Ratings, 28 Comments
The following ratings and reviews are based on verified feedback collected from independently administered patient experience surveys. The ratings and comments submitted by patients reflect their own views and opinions. Patient identities are withheld to ensure confidentiality and privacy.
Oct 23, 2025
Always concerned of your care
Oct 14, 2025
I feel blessed we have Dr Johnson in Mason City. I have made comments in the other section about how his knowledge and assistance through this process has always been ahead of me and spot on! Thank you!
Oct 9, 2025
He's the best Informative knowledgeable Personal hes cares about his patients
Oct 2, 2025
Excellant Dr. We need more like him
Sep 30, 2025
He’s amazing and I’m so glad he’s my endocrinologist. I feel like I struck gold!
Sep 19, 2025
He always reminds me that I can call him any time I think I need to. Most Doctors don't even want to talk to you any more than they have to let alone give you their personal phone #.
Sep 18, 2025
Very nice guy
Sep 17, 2025
Dr. Johnson provides high quality care and is always willing to listen to my questions or concerns.
Sep 16, 2025
Great doctor.
Sep 11, 2025
Great trust worthy doctor who knows and follows my care
Sep 11, 2025
I enjoy hearing Dr. Johnson as my Dr. He listens to the patient and has a good side bed manner
Sep 10, 2025
Dr.Johnson is excellent
Sep 4, 2025
Keep up the greatness
Aug 29, 2025
He very understanding and courtesy
Aug 29, 2025
Enjoyable
Aug 28, 2025
He's a credit to your hospital.
Aug 27, 2025
Excellent dr
Aug 25, 2025
I enjoyed visiting with the resident, Amelia. She took the time to explain some things.
Aug 25, 2025
He’s always willing to listen and advise on my questions.
Aug 21, 2025
Very carding person
Jul 29, 2025
I have been seeing him for a number of years and as I said I value his experience in treating patients.
Jul 23, 2025
I highly recommend Dr. Johnson and his staff!
Jul 22, 2025
He always schedules my appointments later in the afternoon the way I like them
Jul 21, 2025
Doctor Johnson is excellent
Jul 14, 2025
You need more like him. His schedule is full. Due to Medicare regulations it it difficult to schedule with him and other medical providers.
Jul 14, 2025
As stated before, Dr. Johnson takes care of my needs. Always positive!
Jul 14, 2025
He he kind, courteous, & helpful with helping me with my diabetes
Jun 13, 2025
He's the most dedicated physician representing Mercy Health.