
Michael Mortensen, DO
Endocrinology
Highlights
Age Groups Seen
- Adult 18-55
- Older Adult >55
Languages
- English
Gender
MaleAbout Michael Mortensen
Michael Mortensen, DO, is a board-certified Endocrinologist with Northern Arizona Healthcare.
Philosophy
Dr. Mortensen believes in providing patients with the information and tools to manage their own health. He enjoys discussing the specifics of his patients’ concerns and providing a detailed answer to help them better understand what is going on with their health.
Expertise and Special Interests
Dr. Mortensen specializes in the treatment of endocrine system disorders including pituitary; adrenal; parathyroid and thyroid glands. He performs thyroid fine-needle aspirations in a clinic setting.
Education and Certification
Dr. Mortensen earned his doctor of osteopathic medicine from the Arizona College of Osteopathic Medicine at Midwestern University in Glendale, Ariz. He earned his bachelor’s degree in Russian and near Eastern studies from the University of Arizona in Tucson, Ariz. Dr. Mortensen completed his endocrinology fellowship and his internal medicine residency at Banner Good Samaritan Medical Center in Phoenix. Dr. Mortensen is board certified in endocrinology by the American Board of Internal Medicine.
Locations
- Endocrinology at Northern Arizona Healthcare
- 1215 North Beaver Street, Suite 203, Flagstaff, AZ 86001
- Get Directions
- phone: 928-773-2200
- Endocrinology Telemedicine at Northern Arizona Healthcare
- 1215 North Beaver Street, Suite 203, Flagstaff, AZ 86001
- Get Directions
- phone: 928-773-2200
Expertise
Education
- Fellowship: The University of Arizona College of Medicine (Phoenix), Endocrinology, Diabetes and Metabolism
- Residency: Banner Good Samaritan Regional Medical Center (Phoenix, AZ), Internal Medicine
- Internship: Banner Good Samaritan Regional Medical Center (Phoenix, AZ), Internal Medicine
- Medical Education: Arizona College of Osteopathic Medicine of Midwestern University (Glendale) , Osteopathic Medicine, DO
Board Certifications
- Endocrinology Diabetes and Metabolism: American Board of Internal Medicine
Ratings & Reviews
4.9 out of 5
480 ratings, 99 reviewsThe 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.
- 5 out of 5 starsReviewed on 1/29/2026
Dr. Mortensen took the time to listen to me and come up with a plan to help me. I really appreciate that!
- 5 out of 5 starsReviewed on 1/28/2026
Have seen Dr. Mortensen for many years and am pleased to be his patient.
- 5 out of 5 starsReviewed on 1/23/2026
I am very pleased with Dr. Mortensen. He was caring, reassuring and encouraged me. That meant a lot to me, as I have been going through some challenging times. Thank you Doctor!!!
- 5 out of 5 starsReviewed on 1/21/2026
Love Dr Mortensen. Of the doctors I see through NAH he is my favorite by far. Smart and caring.
- 5 out of 5 starsReviewed on 1/20/2026
Dr. Mortensen is among the best of doctors I've ever had. He gets a 10+ rating Every time I'm there. I wish all doctors would be more like him.
- 5 out of 5 starsReviewed on 1/19/2026
Very satisfied
- 5 out of 5 starsReviewed on 1/13/2026
Dr. Mortensen is amazing, have already recommended him to friends
- 5 out of 5 starsReviewed on 1/13/2026
Good, explain everything well to me,
- 5 out of 5 starsReviewed on 1/9/2026
Dr Mortensen always takes time to explain what's happening and why he wants to change medication or to keep me on the medication. His manor makes it easy to accept his medical decision.
- 5 out of 5 starsReviewed on 1/8/2026
Dr. Mortensen seemed concerned about my health and he was happy with the progress I'm making. He explained everything very clearly.
- 5 out of 5 starsReviewed on 1/7/2026
Doctor is great!
- 5 out of 5 starsReviewed on 1/6/2026
Friendly, knowledgeable and professional. Easy to understand and to communicate.
- 5 out of 5 starsReviewed on 1/4/2026
Dr Mortensen is the best! Truly cares and takes the time to explain.
- 5 out of 5 starsReviewed on 1/3/2026
Always make me feel like I'm truly cared about.
- 5 out of 5 starsReviewed on 12/30/2025
Dr. Mortensen is a great physician.
- 5 out of 5 starsReviewed on 12/25/2025
Good
- 5 out of 5 starsReviewed on 12/21/2025
Excellent
- 5 out of 5 starsReviewed on 12/21/2025
Excellent Doctor
- 5 out of 5 starsReviewed on 12/20/2025
Dr. Mortensen is a solid professional. Deals with me, the patient and not (just ) my illnesses! Have recommended him and NAH to others!
- 5 out of 5 starsReviewed on 12/12/2025
I was very happy with my visit with Dr. Michael Mortensen. He was knowledgeable about my health condition. He listened to me, answered my questions. He was very thorough and efficient.
- 5 out of 5 starsReviewed on 12/12/2025
Dr. Mortensen is a pleasure to talk to. He listens to my concerns, remembers them, and considers them in treatment options when possible and appropriate. I'm very glad I chose him to manage my disease.
- 5 out of 5 starsReviewed on 12/4/2025
This endocrinologist has always demonstrated a kind and caring attitude when treating me, including listening and addressing my concerns regarding other heath care issues.
- 5 out of 5 starsReviewed on 11/30/2025
Dr Mortensen is a competent, caring and excellent doctor. I have never felt like I did not understand what was happening with my condition or care. I always felt like I was in good hands with Dr. Mortensen.
- 5 out of 5 starsReviewed on 11/26/2025
I will recommend Dr. Mortensen to anyone I know looking for an endocrinologist. I was really surprised with how well the process went given that I was terrified to go through a thyroid biopsy. Honestly, I was close to tears when I got to the office. Dr. Mortensen really put me at ease. I can tell that really amazing people work in his office (including him).
- 5 out of 5 starsReviewed on 11/21/2025
Excellent
- 5 out of 5 starsReviewed on 11/18/2025
Dr. Mortensen is so well informed, knowledgeable and genuinely personable.
- 5 out of 5 starsReviewed on 11/18/2025
A competent and knowledgeable doctor who instills confidence. Very caring.
- 5 out of 5 starsReviewed on 11/14/2025
Dr Mortensen is always professional and explains rational for any changes in my care.
- 5 out of 5 starsReviewed on 11/14/2025
Always a great experience
- 5 out of 5 starsReviewed on 11/11/2025
Dr Mortensen has good patient/Dr communication. Always felt comfortable.
- 5 out of 5 starsReviewed on 11/6/2025
The quality of care and course of treatment and monitoring of my health with my diagnosis has been transparent and educating. Having and working with him and trusting him with his treating me I would recommend him to those that need care he provides.
- 5 out of 5 starsReviewed on 11/1/2025
I have found Dr. Mortensen amazing from the beginning. He came highly recommended by my oncologist. They are a team.
- 5 out of 5 starsReviewed on 10/31/2025
He listens, and he's thoughtful. He respects my concerns. He discussed a new option and was thorough.
- 5 out of 5 starsReviewed on 10/28/2025
Dr Mortensen is wonderful!
- 2 out of 5 starsReviewed on 10/3/2025
Very nice & personable. Not sure it is the right fit for me.
- 5 out of 5 starsReviewed on 10/3/2025
Execellent caring Doctor.
- 5 out of 5 starsReviewed on 10/2/2025
Mortensen's always great for all of the above.
- 5 out of 5 starsReviewed on 9/27/2025
Dr Mortensen is amazing - one of my favorites of all time! He is thorough in his assessments and listens with care. He gives me the confidence that my health issues are heard and an action plan is in place to monitor and either slow/stop progression of the issue or reverse it. Hes the best by far! He also touches base with my nephrologist as needed to ensure my treatment plan is optimized for both conditions. He is THE BEST by far!
- 5 out of 5 starsReviewed on 9/19/2025
Dr. M explained the results of my bone scan when I told him I didn't know what the results were.
- 5 out of 5 starsReviewed on 9/16/2025
Informed and pleasant
- 4 out of 5 starsReviewed on 9/13/2025
I never give a "Very Good" as we all have some fault. So the "Good" rating would probably be "Very Good" in your eyes. Enjoyed my visit w/Dr. Mortensen. Thorough in going over my blood work. No changes were made & he explained the "why".
- 5 out of 5 starsReviewed on 9/12/2025
Dr. Mortensen was competent, friendly and patient. He took the time to answer questions and fully explain my situation.
- 5 out of 5 starsReviewed on 9/8/2025
Yes it's a great hospital.
- 5 out of 5 starsReviewed on 8/23/2025
He's a very good doctor
- 5 out of 5 starsReviewed on 8/19/2025
So happy with my Dr
- 5 out of 5 starsReviewed on 8/16/2025
Great care provided. Listened and discussed concerns or comforts.
- 5 out of 5 starsReviewed on 8/8/2025
I feel Dr Mortensen listens and cares about me. He explained everything in an easy manner and made sure he answered my questions.
- 5 out of 5 starsReviewed on 8/5/2025
Excellent explanations. Promptly contacted me personally with lab test results and dose of medication to be on.
- 4 out of 5 starsReviewed on 8/5/2025
Did great job
- 5 out of 5 starsReviewed on 8/1/2025
Dr. Mortensen is excellent -- down to earth, quite engaging.
- 5 out of 5 starsReviewed on 7/30/2025
Good
- 5 out of 5 starsReviewed on 7/29/2025
Dr. Mortensen was very clear and explaining my concerns in how we're going to proceed
- 5 out of 5 starsReviewed on 7/27/2025
Dr. Mortensen is knowledgeable, communicative, clear, and kind.
- 5 out of 5 starsReviewed on 7/25/2025
Dr. Mortensen is among the best doctors I have ever had. He very thorough and clear regarding my medical needs. Thank you.
- 5 out of 5 starsReviewed on 7/25/2025
Dr. Mortensen just the best. Worth the drive from Prescott
- 5 out of 5 starsReviewed on 7/23/2025
The dr noticed other issues I was having and was eager to learn about them and see if they had any relation to the issues I see him for. He was curious and engaging and cares deeply about his patients.
- 5 out of 5 starsReviewed on 7/19/2025
Everything was just fine
- 5 out of 5 starsReviewed on 7/18/2025
Extremely through and very easy to talk to also!
- 5 out of 5 starsReviewed on 7/16/2025
Highly knowledgeable. Discussed next steps in treatment with me
- 5 out of 5 starsReviewed on 7/15/2025
The doctor is always very pleasant and attentive. I joy to see.
- 5 out of 5 starsReviewed on 7/4/2025
I am very impressed and happy with the care I received.
- 5 out of 5 starsReviewed on 7/3/2025
He is so nice. He made me feel important and listened to me as I told about my history. He asked questions and made me feel comfortable. I will for sure recommend him to all I know
- 5 out of 5 starsReviewed on 7/1/2025
I very much appreciated Dr Mortenson's attentiveness and his willingness to listen to my concerns and answer my questions. He explained the "action plan" that we are implementing, and I felt like we were on the same team. I'm very encouraged that Dr Mortensen will be able to accurately diagnose the cause of my random hypoglycemic attacks.
- 5 out of 5 starsReviewed on 6/28/2025
Great experience with Dr Mortensen
- 5 out of 5 starsReviewed on 6/28/2025
Dr Mortensen is truly one of the best providers. I wish more were as skilled, knowledgeable, and compassionate as he is. He is respectful and answers questions.
- 5 out of 5 starsReviewed on 6/27/2025
With changes in medical conditions I wanted to see the doctor in person. Dr. M was thorough, and he looked at recent lab tests and was concerned for their accuracy.
- 5 out of 5 starsReviewed on 6/27/2025
Excellent care....always easy to talk with.
- 5 out of 5 starsReviewed on 6/27/2025
Dr Mortensen was excellent. We see many doctors and he is at the top of the list for explaining about my condition. We were very pleased with him and the care and time he took explaining things to us
- 5 out of 5 starsReviewed on 6/27/2025
Dr Mortensen is the best!
- 5 out of 5 starsReviewed on 6/26/2025
Everything went well Dr provide great details explained everything! Excellent Dr
- 5 out of 5 starsReviewed on 6/26/2025
Dr. Mortensen is an excellent listener and offers good insights regarding any questions or concerns.
- 4 out of 5 starsReviewed on 6/23/2025
I think Dr Mortensen knows his job very well
- 5 out of 5 starsReviewed on 6/22/2025
He is excellent in every way.
- 5 out of 5 starsReviewed on 6/19/2025
Good
- 5 out of 5 starsReviewed on 6/18/2025
Good Guy.
- 5 out of 5 starsReviewed on 6/18/2025
If I could give Dr. Mortenson more than a 5 I would. He is very knowledgeable yet listens to me and I actually feel like I'm part of my care not just being told what to do or scolded. He thinks out of the box and tries to stay ahead of what the insurance company may dictate so that I am on the best course of treatment and not hitting any roadblocks. He seems very down to earth, unlike most doctors and has a great sense of humor. He is truly an asset to the NAH team.
- 5 out of 5 starsReviewed on 6/13/2025
Dr Mortensen is a kind doctor. He has never made me feel rushed. He listens and shows that he's interested in my care.
- 5 out of 5 starsReviewed on 6/10/2025
Dr. Mortensen is a fabulous Dr. Who listens and explains. He makes me very comfortable during my appointment.
- 5 out of 5 starsReviewed on 6/7/2025
I was very happy with the information and plan made for my health.
- 5 out of 5 starsReviewed on 6/6/2025
Everything was explained to me very clearly
- 5 out of 5 starsReviewed on 6/5/2025
I have the best visits with Dr Mortensen. He answers questions and doesn't treat me like just another number
- 5 out of 5 starsReviewed on 5/31/2025
I have no complaints. Everything was great
- 5 out of 5 starsReviewed on 5/30/2025
He made sure I understood and answered all my questions.
- 5 out of 5 starsReviewed on 5/30/2025
Wonderful Doctor
- 5 out of 5 starsReviewed on 5/30/2025
Would definitely recommend to any and all !
- 3 out of 5 starsReviewed on 5/28/2025
I do like the physician.
- 5 out of 5 starsReviewed on 5/25/2025
Dr Mortensen is monitoring my hyper thyroid condition. He asks pertinent questions and follows up with needed changes.
- 5 out of 5 starsReviewed on 5/22/2025
Dr. Mortensen is AMAZING! Great communicator. Explains very well too.
- 5 out of 5 starsReviewed on 5/20/2025
Dr. Mortensen and his staff are always on time and provide the best care.
- 5 out of 5 starsReviewed on 5/19/2025
Dr Mortensen was wonderful. Dr Mortensen gave me information no other practitioner had ever provided me before regarding both my thyroid condition and my osteoporosis.
- 5 out of 5 starsReviewed on 5/17/2025
Dr put me at ease, explained future possibilities and seemed to care about me. He answered all questions.
- 5 out of 5 starsReviewed on 5/16/2025
Dr. Mortensen is one of the best overall doctors I've ever seen.
- 5 out of 5 starsReviewed on 5/13/2025
Excellent. Professional. Seemed to really listen
- 5 out of 5 starsReviewed on 5/12/2025
Outstanding Doctor
- 5 out of 5 starsReviewed on 5/7/2025
The best
- 5 out of 5 starsReviewed on 5/3/2025
Dr. Mortensen was excellent during visit and after when I emailed questions. Compassionate and responsive. Explained things really well and easy to understand.
- 5 out of 5 starsReviewed on 5/3/2025
I choose my medical insurance by who Dr. Mortensen takes. I won't go anywhere else. I trust and respect him.
- 5 out of 5 starsReviewed on 5/1/2025
Very professional
- 5 out of 5 starsReviewed on 4/15/2025
Dr Mortensen is really great about allowing you time for your questions and concerns.