Mark Johnson, MD
Endocrinology
MercyOne North Iowa Diabetes, Endocrinology and Weight Loss
910 N Eisenhower Ave.
Mason City, IA 50401 Directions
5.0 out of 5
37 verified ratings
37 Ratings, 3 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.
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!
Jun 13, 2025
He's the most dedicated physician representing Mercy Health.