
Highlights
Age Groups Seen
- Adult 19-64
- Older Adult >65
Gender
FemaleHospital Affiliation
- Lutheran Hospital
- Saint Joseph Hospital
About Kathryn H. O'Day
About The Provider
Originally from Sioux Falls, South Dakota, Dr. O'Day earned her medical degree from the University of Minnesota Medical School in the Twin Cities. She completed an internship and residency in internal medicine at Brigham and women's Hospital in Boston, and a fellowship in endocrinology, diabetes and metabolism at the New York University School of Medicine in New York. Dr. O'Day is board certified in internal medicine and endocrinology, diabetes and metabolism.
Dr. O'Day has a special interest in diabetes management, cystic fibrosis related diabetes, thyroid disorders, thyroid cancer, pituitary disorders, polycystic ovarian syndrome, osteoporosis and adrenal disorders. Prior to relocating to Denver, Dr. O'Day was working as an endocrinologist in Minnesota, in the Twin Cities area.
Dr. O'Day and her family moved from Minneapolis to Denver for the sunshine and the mountains. During her free time she enjoys hiking with her husband and son, and all things Disney.
Video
Locations
- Candelas Clinic - Diabetes & Endocrinology & Education
- 15389 West 91st Drive, Suite 200, Arvada, CO 80007
- Get Directions
- phone: 303-403-7933
- fax: 303-403-7945
Expertise
Education
- Internship: Mercy Hospital, 2015
- Fellowship: New York University School of Medicine, Endocrinology, Diabetes and Metabolism, 2010
- Residency: Brigham and Women's Hospital, Internal Medicine, 2007
- Medical School: University of Minnesota Medical School, 2004
Board Certifications
- Endocrinology Diabetes and Metabolism: American Board of Internal Medicine, 2007
Insurance
- Aetna
- Anthem BCBS
- Cigna
- Clear Spring
- Cofinity
- Colorado Access
- CorVel
- Coventry
- Denver Health
- First Health/Coventry
- Friday Health Plans
- Humana
- InnovAge PACE
- Kaiser (limited coverage)
- Meritain via Aetna Network
- Pinnacol Assurance
- Prime Health Services Inc
- Rocky Mountain Health Plans
- SCL Lutheran Hospice
- Three Rivers Provider Network
- TriWest
- United Healthcare
Ratings & Reviews
4.9 out of 5
782 ratings, 92 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 1/30/2026
Communicates clearly, spends adequate time with her patients and is so conscientious
- 5 out of 5 starsReviewed on 1/26/2026
She is the absolute best!
- 5 out of 5 starsReviewed on 1/21/2026
Very through and always willing to explore options on my treatment
- 5 out of 5 starsReviewed on 1/18/2026
Dr Oday is an excellent provider and trusted care-giver
- 5 out of 5 starsReviewed on 1/17/2026
Dr O'Day is personable, knowledgeable, and excellent in explaining what I need to do to improve and maintain my health while managing Type I diabetes. She listens to my questions and explains what I need to know. I don't feel rushed, she always gives me her attention fully.
- 5 out of 5 starsReviewed on 1/16/2026
Friendly and easy to talk to. And a great memory...
- 5 out of 5 starsReviewed on 12/26/2025
She was very kind and knowledgeable. I felt like she cared about me as an individual.
- 5 out of 5 starsReviewed on 12/20/2025
She listened and answered my questions regarding care and goals
- 5 out of 5 starsReviewed on 12/19/2025
Very helpful
- 5 out of 5 starsReviewed on 12/14/2025
Very good listener to my needs
- 5 out of 5 starsReviewed on 12/14/2025
We feel really lucky to have Dr O’Day as our doctor. She takes great care of us and is a really nice person, too.
- 5 out of 5 starsReviewed on 12/14/2025
GREAT DR
- 5 out of 5 starsReviewed on 12/13/2025
She sits with me explains my issues and lets me know if im doing good or bad shes very informative! Great Doctor!
- 5 out of 5 starsReviewed on 12/13/2025
She is very ecouraging
- 5 out of 5 starsReviewed on 12/11/2025
Very easy to communicate with. She didn't attempt to take control of my treatment.
- 5 out of 5 starsReviewed on 12/8/2025
I trust Dr O'Day completely. She listens to you.
- 5 out of 5 starsReviewed on 12/6/2025
Extremely nice and very professional. She took time to explain results of test and answer additional questions.
- 5 out of 5 starsReviewed on 12/3/2025
She is great!!!
- 5 out of 5 starsReviewed on 11/29/2025
She was very patient and explained everything in detail with out feeling rushed.
- 5 out of 5 starsReviewed on 11/29/2025
Dr O day addresses my concerns and is a good communicator. She’s the Best !
- 5 out of 5 starsReviewed on 11/29/2025
Dr O’Day is a jewel.
- 5 out of 5 starsReviewed on 11/26/2025
I have worked with Dr. O’Day for several years. I don’t know what I would do without her help. She is the best!
- 5 out of 5 starsReviewed on 11/21/2025
Saved my life-Great advice Very caring
- 5 out of 5 starsReviewed on 11/16/2025
There is a reason I drive 50 mins across town to see Dr, O’Day. She’s awesome!
- 5 out of 5 starsReviewed on 11/16/2025
Very friendly and caring, professional and knowledgeable.
- 5 out of 5 starsReviewed on 11/10/2025
She is very knowledgeable about my issues and my own case.
- 5 out of 5 starsReviewed on 11/9/2025
She was warm and easy to talk with. She listened, and explained information thoroughly.
- 5 out of 5 starsReviewed on 11/9/2025
Dr O’Day knows me as a person which is essential to putting a care plan in place. I know she truly cares about me as a human. Best endocrinologist I’ve seen. Love her as my specialist and as a person.
- 5 out of 5 starsReviewed on 11/8/2025
Took time, very aware, straightforward explanation and decisive direction.
- 5 out of 5 starsReviewed on 11/3/2025
Dr O'Day took her time and explained very well what the results were of my ultrasound. She also asked questions personally about my life. Which doesn't happen very often with the new way of treating patients.
- 5 out of 5 starsReviewed on 11/3/2025
Easy to talk with and easy to relax!
- 5 out of 5 starsReviewed on 11/1/2025
She is very nice
- 5 out of 5 starsReviewed on 10/31/2025
She is very smart and professional caring funny I really like her a lot
- 5 out of 5 starsReviewed on 10/28/2025
She was friendly and understanding of what I needed.
- 5 out of 5 starsReviewed on 10/24/2025
She is compassionate and caring and she listens to what is going on with my needs. I trust her implicitly and look forward to what steps are needed to start feeling better.
- 5 out of 5 starsReviewed on 10/23/2025
Super nice
- 3 out of 5 starsReviewed on 10/23/2025
Once I she understood how much I needed her to listen, she was very helpful.
- 5 out of 5 starsReviewed on 10/20/2025
Dr. O’Day is patient, actively listens, answers my questions, doesn’t make me feel rushed, is respectful and has a sense of humor!
- 5 out of 5 starsReviewed on 10/17/2025
She is the best Endocrinologist - I've had many in 30 years!
- 5 out of 5 starsReviewed on 10/17/2025
Excellent dr
- 5 out of 5 starsReviewed on 10/16/2025
Great Doctor and great person.
- 5 out of 5 starsReviewed on 10/6/2025
She’s personable and listens to my questions.
- 5 out of 5 starsReviewed on 10/4/2025
Dr. O'Day is such a good doctor. She is so professional and willing to discuss my concerns and has given me great advice and my health is improving with each visit. I highly recommend her!
- 5 out of 5 starsReviewed on 9/29/2025
Dr O'Day has been there for me when dealing with sudden needs for surgery and very serious illnesses. She is ready to provide expert medication input for surgery and sicknesses when needed. I am very grateful for her support in keeping me safe at those times with appropriate prescriptions.
- 5 out of 5 starsReviewed on 9/24/2025
Excellence. My trip to the clinic is longer, but so worth it!
- 5 out of 5 starsReviewed on 9/24/2025
Dr O’Day spent a lot of time with me answering my questions and helped me to enroll in a program to get a lower cost medicine. She’s very caring and personable.
- 5 out of 5 starsReviewed on 9/24/2025
Love this doctor very much.
- 5 out of 5 starsReviewed on 9/23/2025
Always takes the time to listen and is genuine in her care for her patients.
- 5 out of 5 starsReviewed on 9/23/2025
Stress truly amazing, kind and compassionate.
- 5 out of 5 starsReviewed on 8/28/2025
I've been seeing her for years and she's always been knowledgeable, professional, and friendly.
- 5 out of 5 starsReviewed on 8/27/2025
She is so awesome and helpful and deeply cares about getting me feeling better.
- 5 out of 5 starsReviewed on 8/24/2025
I think she is great, wonderful personality, makes conversation about concerns simple and I have always felt heard
- 5 out of 5 starsReviewed on 8/21/2025
Dr. O'Day is very caring and a great listener. She cares about seeing that my care is a prime concern of hers.
- 5 out of 5 starsReviewed on 8/21/2025
We drive nearly an hour to see Dr. O'Day. I wish the clinic were closer, but it is what it is. Dr. O'Day is THE BEST!
- 5 out of 5 starsReviewed on 8/19/2025
She’s a great doc!
- 5 out of 5 starsReviewed on 8/18/2025
I feel very comfortable to share any of my problems with Dr. O'Day. She's very friendly, understanding, I got answers on all of my questions.
- 5 out of 5 starsReviewed on 8/17/2025
She is a good listener and is very knowledgeable and explains the issues.
- 5 out of 5 starsReviewed on 8/17/2025
Dr O'Day is excellent and I'm grateful to be in her care. At appointments, she is thorough and answers any questions I have. I am confident in the care plan she recommends for me. Test results, follow up appointments and messages are always communicated promptly. My endocrine health and general health have improved with her care.
- 5 out of 5 starsReviewed on 8/17/2025
Listened to how I was feeling and explained options in understandable manner
- 5 out of 5 starsReviewed on 8/15/2025
No complaints; only compliments
- 5 out of 5 starsReviewed on 8/10/2025
Friendly. Didn’t feel rushed. Answered my questions to my satisfaction. Explained my test results so I could understand what was going on in my body.
- 5 out of 5 starsReviewed on 8/5/2025
Makes me feel good about my life in general
- 5 out of 5 starsReviewed on 8/2/2025
Wonderful she is a great doctor and I feel lucky to have her
- 5 out of 5 starsReviewed on 8/1/2025
She went the extra mile, examining my concerns to rule out serious problems I had suspected wrongly on my own.
- 5 out of 5 starsReviewed on 7/27/2025
I love Dr.O'Day. She listens to you, she patient. She's just wonderful Dr.
- 5 out of 5 starsReviewed on 7/27/2025
She takes time to ask questions
- 5 out of 5 starsReviewed on 7/26/2025
She was very generous in providing insights into my particular medical concerns.
- 5 out of 5 starsReviewed on 7/25/2025
She's very caring and answers all your questions and very noligable about everything
- 5 out of 5 starsReviewed on 7/9/2025
Happy with my first visit
- 5 out of 5 starsReviewed on 7/8/2025
Dr. O'Day takes the time with the patient (me) and listens and answers all of my questions clearly and concisely.
- 5 out of 5 starsReviewed on 6/28/2025
Dr. O'Day listens to my situation and gives great advice and cares about me as a patient.
- 5 out of 5 starsReviewed on 6/27/2025
Dr. Odea was so awesome. Listened and gave me positive feedback and wasn't afraid to tell me when things were wrong. She treated me as a person, shares great confidence and support
- 5 out of 5 starsReviewed on 6/25/2025
I have been with Catherine O'Day I can say maybe 6 years not sure but she is an excellent endocrinologist and has knowledge in the medical field beyond that she is so informative I trust her very much with my health and the direction she gives me how take care of myself very well what should I do
- 5 out of 5 starsReviewed on 6/22/2025
Dr. O'Day took more time and care in our conversation than my past experiences. My questions may seem silly to doctors but I appreciate that Dr. O'Day did not treat them as silly. Thank you.
- 5 out of 5 starsReviewed on 6/19/2025
Dr O’Day listens, asks pertinent questions, answers my questions and explains my labs to my understanding.
- 5 out of 5 starsReviewed on 6/18/2025
She rocks
- 5 out of 5 starsReviewed on 6/16/2025
Excellent provider.
- 5 out of 5 starsReviewed on 6/13/2025
Dr.O’Day is absolutely awesome
- 5 out of 5 starsReviewed on 6/13/2025
Dr O’Day is VERY caring, listens to my needs, answers my questions and is so personable. So grateful that she is my Endocrinologist!
- 5 out of 5 starsReviewed on 6/13/2025
She's awesome
- 5 out of 5 starsReviewed on 6/12/2025
I love Dr. O'Day! She listens carefully, asks excellent questions, and has good suggestions for how to help. :)
- 5 out of 5 starsReviewed on 6/7/2025
Dr O'Day rakes the time to listen to you. Explains your questions so you understand what's going on.
- 5 out of 5 starsReviewed on 5/25/2025
Dr O Day is very knowledgeable and one of my favorite physicians.
- 5 out of 5 starsReviewed on 5/20/2025
Dr. O’Day is very approachable.
- 5 out of 5 starsReviewed on 5/9/2025
Dr O’Day is personable, efficient, and interested in my situation. Did not feel rushed.
- 4 out of 5 starsReviewed on 5/9/2025
Very professional and caring
- 5 out of 5 starsReviewed on 5/8/2025
Dr O'Day went into great detail to form a plan for my care.
- 5 out of 5 starsReviewed on 4/30/2025
My doctor is the best 🙌
- 5 out of 5 starsReviewed on 4/28/2025
Dr. O'Day, is courteous and helpful. She listens to your questions and gives her opinion. She is always interested in how best to help a person. It is always nice to see Dr. O'Day.
- 5 out of 5 starsReviewed on 4/26/2025
Dr O'Day was both an expert in her field and very kind
- 5 out of 5 starsReviewed on 4/26/2025
Dr. O'day is so understanding, kind and has so much patience.
- 5 out of 5 starsReviewed on 4/19/2025
Dr ODay is a treasure. She’s the best endocrinologist I’ve ever had. She listens and involves me in care discussions. She finds solutions.