Dr. Diana L Westerfield, DO
Cardiology
10 Hospital Drive, Suite 100
Saint Peters, MO 63376 Directions
4.9 out of 5
242 verified ratings
242 Ratings, 71 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.
Apr 26, 2026
What else would you like to say about your experience?
Dr. Westerfield is so great, I felt she truly cared about my issue.
I will recommend her to all my friends. It was a great experience..
Apr 24, 2026
What else would you like to say about your experience?
Dr. Westerfield and her staff are the most caring and knowledgeable doctors we know. If it weren't for them I probably wouldn't be here now.
Apr 23, 2026
What else would you like to say about your experience?
The provider was very professional. She was thorough in her questions to understand my symptoms. She studied my medical records before my appointment and made notes. She listened carefully to my explanation of events and past medical history. She was thoughtful, and I was highly motivated to follow the course of treatment she prescribed.
Apr 16, 2026
What else would you like to say about your experience?
Dr. Westerfield explains things in a way that keeps you calm. Sometimes a person's imagination gets carried away, but she brings you back to earth with her kind and caring manner. I highly recommend her and BJC.
Apr 16, 2026
What else would you like to say about your experience?
Dr Westerfield is a wonderful person n a great dr. I am very happy to have her as my cardiologist.
Apr 15, 2026
What else would you like to say about your experience?
Dr. Westerfield is excellent and the pacemaker nurse eas excellent and a wealth of information. They are the best.
Apr 15, 2026
What else would you like to say about your experience?
Ever since I have been seeing Dr. Westerfield it’s been one of the best decisions I made in my life. She is a terrific and wonderful doctor.
Apr 15, 2026
What else would you like to say about your experience?
I have been seeing Dr. Westerfield since March 2019. When I was first diagnosed with CHF in the hospital I thought it was the end for me. Then I met Dr. Westerfield and she proved to me I was wrong and now I am doing very well. She was very hopeful and she continues to make me feel hopeful. She’s a joy to have as my doctor.
Apr 14, 2026
What else would you like to say about your experience?
Everyone was very helpful and my appointment was kept on time
Dr. Westerfield is an outstanding doctor. She answers your questions very promptly and in language that one can understand.
Apr 13, 2026
What else would you like to say about your experience?
Excellent staff.
Apr 11, 2026
What else would you like to say about your experience?
The best doctor in the state of Missouri. I love her. Thank you.
Apr 10, 2026
What else would you like to say about your experience?
Great. Everything was great.
Apr 8, 2026
What else would you like to say about your experience?
Dr Westerfield was awesome!
Apr 6, 2026
What else would you like to say about your experience?
Always a positive experience. Staff always helpful and friendly
Apr 6, 2026
What else would you like to say about your experience?
Everybody there, including Dr. Westerfield Our A1
Apr 3, 2026
What else would you like to say about your experience?
Dr. Westerfield is wonderful! Very personable, makes the patient feel comfortable. She is the only doctor Mom doesn’t complain about going to! Mom feels like she’s “visible” with the attention she gets from Dr. Westerfield. And, Diane can be a very snappy dresser, very professional! She’s an asset to BJC!
Mar 20, 2026
What else would you like to say about your experience?
Everything went exceptionally well. Staff and Doctor are very knowledgeable and friendly.
Mar 18, 2026
What else would you like to say about your experience?
I love Dr Westerfield. She makes you feel listened too and she is very caring.
Mar 18, 2026
What else would you like to say about your experience?
Dr. Westerfield is fantastic! She is so down to earth in explaining things and has familiarized herself with your history before entering the room. Best Cardiologist I have ever had!!!
Mar 17, 2026
What else would you like to say about your experience?
Always a good experience with Dr westerfield
Mar 16, 2026
What else would you like to say about your experience?
As always the treatment was excellent
Mar 15, 2026
What else would you like to say about your experience?
Great care as always
Mar 14, 2026
What else would you like to say about your experience?
You could get more doctors like Dr. Westerfield. She's just the best.
Mar 13, 2026
What else would you like to say about your experience?
Doctor is kind and concerned. explains test results. very happy with her
Mar 13, 2026
What else would you like to say about your experience?
Dr Westerfield is the best! She takes her time while examining my husband and answers all my many questions!!
Mar 12, 2026
What else would you like to say about your experience?
On this day, I received exceptional care. I was never made to feel rushed or unheard.
Mar 12, 2026
What else would you like to say about your experience?
Dr is the best
Mar 12, 2026
What else would you like to say about your experience?
They were very kind and helpful.
Oct 14, 2025
Was there anything that you feel was outstanding?
Dr westerfield was very good in taking care of my needs of medical needs. Thank you
What could have been done to improve your experience?
Nothing comes to mind.
Oct 7, 2025
Was there anything that you feel was outstanding?
All good
Oct 7, 2025
What could have been done to improve your experience?
Doctor needs to listen to patient!
Oct 7, 2025
Was there anything that you feel was outstanding?
Dr. Westerfield
What could have been done to improve your experience?
Nothing
Oct 4, 2025
Was there anything that you feel was outstanding?
The staff & the dr
What could have been done to improve your experience?
O
Oct 2, 2025
Was there anything that you feel was outstanding?
Dr. Westerfield! Has a way of making you feel comfortable & including patient in discussion
Sep 25, 2025
Was there anything that you feel was outstanding?
Yes Dr Westerfield, she was great.
What could have been done to improve your experience?
Nothing
Sep 19, 2025
Was there anything that you feel was outstanding?
Everyone was very attentive!
What could have been done to improve your experience?
Nothing.
Sep 18, 2025
Was there anything that you feel was outstanding?
Dr westerfield did go over all of my prescription drugs and explained how each one worked in detail. I never had a doctor do that before.
Sep 16, 2025
Was there anything that you feel was outstanding?
Visits with Dr. Westerfield is always a pleasure. She and her staff are excellent in every way.
Sep 13, 2025
Was there anything that you feel was outstanding?
Dr W is always excellent.
What could have been done to improve your experience?
N a
Sep 9, 2025
Was there anything that you feel was outstanding?
I really enjoyed talking to Dr. Westerfield. She was very professional, kind, and knowledgeable.
Sep 6, 2025
Was there anything that you feel was outstanding?
She is the best
Sep 6, 2025
What could have been done to improve your experience?
Nothing
Aug 19, 2025
Was there anything that you feel was outstanding?
Definitely Dr. Westerfield
What could have been done to improve your experience?
Nothing
Aug 12, 2025
Was there anything that you feel was outstanding?
Dr was very pleasant, friendly and took time to answer my concerns I’m happy to have her as my cardiologist
What could have been done to improve your experience?
Visit was perfect
Aug 10, 2025
Was there anything that you feel was outstanding?
Dr Westerfield is gracious caring and concerned. How can you beat that
Aug 9, 2025
Was there anything that you feel was outstanding?
Dr.Westerfield is an excellent physician. She is very dedicated to her patients. She has an amazing personality and makes you feel so comfortable. You can see how much she cares about her patients. I am very thankful she is my doctor. I know I am in great hands.
What could have been done to improve your experience?
Nothing I can think of
Aug 9, 2025
Was there anything that you feel was outstanding?
Dr Diana Westerfield was excellent to deal with. She explained things thoroughly & in a clear way so we knew what was happening. Both Dr. Westerfield & her staff made us feel at ease & relieved our concerns & fears. We feel we are in capable hands.
What could have been done to improve your experience?
Nothing that we know of.
Aug 8, 2025
Was there anything that you feel was outstanding?
Yes. My doctor as always
Aug 2, 2025
Was there anything that you feel was outstanding?
My first time with Dr Westerfield. She’s terrific!!
Aug 1, 2025
Was there anything that you feel was outstanding?
Dr. Westerfield
What could have been done to improve your experience?
Nothing