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Kathryn H. O'Day

Kathryn H. O'Day, MD

Endocrinology

Accepting New Patients
Need help scheduling? Call 303-403-7933

Highlights

Age Groups Seen

  • Adult 19-64
  • Older Adult >65

Gender

Female

Hospital 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

  1. Candelas Clinic - Diabetes & Endocrinology & Education

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

Please contact the doctor's office directly to confirm acceptance of insurance.
Search plans
  • 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 reviews

The 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.

Search reviews
    5 out of 5 stars
    Reviewed on 1/30/2026

    Communicates clearly, spends adequate time with her patients and is so conscientious

    5 out of 5 stars
    Reviewed on 1/26/2026

    She is the absolute best!

    5 out of 5 stars
    Reviewed on 1/21/2026

    Very through and always willing to explore options on my treatment

    5 out of 5 stars
    Reviewed on 1/18/2026

    Dr Oday is an excellent provider and trusted care-giver

    5 out of 5 stars
    Reviewed 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 stars
    Reviewed on 1/16/2026

    Friendly and easy to talk to. And a great memory...

    5 out of 5 stars
    Reviewed on 12/26/2025

    She was very kind and knowledgeable. I felt like she cared about me as an individual.

    5 out of 5 stars
    Reviewed on 12/20/2025

    She listened and answered my questions regarding care and goals

    5 out of 5 stars
    Reviewed on 12/19/2025

    Very helpful

    5 out of 5 stars
    Reviewed on 12/14/2025

    Very good listener to my needs

    5 out of 5 stars
    Reviewed 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 stars
    Reviewed on 12/14/2025

    GREAT DR

    5 out of 5 stars
    Reviewed 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 stars
    Reviewed on 12/13/2025

    She is very ecouraging

    5 out of 5 stars
    Reviewed on 12/11/2025

    Very easy to communicate with. She didn't attempt to take control of my treatment.

    5 out of 5 stars
    Reviewed on 12/8/2025

    I trust Dr O'Day completely. She listens to you.

    5 out of 5 stars
    Reviewed 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 stars
    Reviewed on 12/3/2025

    She is great!!!

    5 out of 5 stars
    Reviewed on 11/29/2025

    She was very patient and explained everything in detail with out feeling rushed.

    5 out of 5 stars
    Reviewed on 11/29/2025

    Dr O day addresses my concerns and is a good communicator. She’s the Best !

    5 out of 5 stars
    Reviewed on 11/29/2025

    Dr O’Day is a jewel.

    5 out of 5 stars
    Reviewed 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 stars
    Reviewed on 11/21/2025

    Saved my life-Great advice Very caring

    5 out of 5 stars
    Reviewed 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 stars
    Reviewed on 11/16/2025

    Very friendly and caring, professional and knowledgeable.

    5 out of 5 stars
    Reviewed on 11/10/2025

    She is very knowledgeable about my issues and my own case.

    5 out of 5 stars
    Reviewed on 11/9/2025

    She was warm and easy to talk with. She listened, and explained information thoroughly.

    5 out of 5 stars
    Reviewed 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 stars
    Reviewed on 11/8/2025

    Took time, very aware, straightforward explanation and decisive direction.

    5 out of 5 stars
    Reviewed 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 stars
    Reviewed on 11/3/2025

    Easy to talk with and easy to relax!

    5 out of 5 stars
    Reviewed on 11/1/2025

    She is very nice

    5 out of 5 stars
    Reviewed on 10/31/2025

    She is very smart and professional caring funny I really like her a lot

    5 out of 5 stars
    Reviewed on 10/28/2025

    She was friendly and understanding of what I needed.

    5 out of 5 stars
    Reviewed 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 stars
    Reviewed on 10/23/2025

    Super nice

    3 out of 5 stars
    Reviewed on 10/23/2025

    Once I she understood how much I needed her to listen, she was very helpful.

    5 out of 5 stars
    Reviewed 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 stars
    Reviewed on 10/17/2025

    She is the best Endocrinologist - I've had many in 30 years!

    5 out of 5 stars
    Reviewed on 10/17/2025

    Excellent dr

    5 out of 5 stars
    Reviewed on 10/16/2025

    Great Doctor and great person.

    5 out of 5 stars
    Reviewed on 10/6/2025

    She’s personable and listens to my questions.

    5 out of 5 stars
    Reviewed 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 stars
    Reviewed 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 stars
    Reviewed on 9/24/2025

    Excellence. My trip to the clinic is longer, but so worth it!

    5 out of 5 stars
    Reviewed 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 stars
    Reviewed on 9/24/2025

    Love this doctor very much.

    5 out of 5 stars
    Reviewed on 9/23/2025

    Always takes the time to listen and is genuine in her care for her patients.

    5 out of 5 stars
    Reviewed on 9/23/2025

    Stress truly amazing, kind and compassionate.

    5 out of 5 stars
    Reviewed on 8/28/2025

    I've been seeing her for years and she's always been knowledgeable, professional, and friendly.

    5 out of 5 stars
    Reviewed on 8/27/2025

    She is so awesome and helpful and deeply cares about getting me feeling better.

    5 out of 5 stars
    Reviewed 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 stars
    Reviewed 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 stars
    Reviewed 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 stars
    Reviewed on 8/19/2025

    She’s a great doc!

    5 out of 5 stars
    Reviewed 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 stars
    Reviewed on 8/17/2025

    She is a good listener and is very knowledgeable and explains the issues.

    5 out of 5 stars
    Reviewed 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 stars
    Reviewed on 8/17/2025

    Listened to how I was feeling and explained options in understandable manner

    5 out of 5 stars
    Reviewed on 8/15/2025

    No complaints; only compliments

    5 out of 5 stars
    Reviewed 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 stars
    Reviewed on 8/5/2025

    Makes me feel good about my life in general

    5 out of 5 stars
    Reviewed on 8/2/2025

    Wonderful she is a great doctor and I feel lucky to have her

    5 out of 5 stars
    Reviewed 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 stars
    Reviewed on 7/27/2025

    I love Dr.O'Day. She listens to you, she patient. She's just wonderful Dr.

    5 out of 5 stars
    Reviewed on 7/27/2025

    She takes time to ask questions

    5 out of 5 stars
    Reviewed on 7/26/2025

    She was very generous in providing insights into my particular medical concerns.

    5 out of 5 stars
    Reviewed on 7/25/2025

    She's very caring and answers all your questions and very noligable about everything

    5 out of 5 stars
    Reviewed on 7/9/2025

    Happy with my first visit

    5 out of 5 stars
    Reviewed 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 stars
    Reviewed 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 stars
    Reviewed 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 stars
    Reviewed 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 stars
    Reviewed 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 stars
    Reviewed 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 stars
    Reviewed on 6/18/2025

    She rocks

    5 out of 5 stars
    Reviewed on 6/16/2025

    Excellent provider.

    5 out of 5 stars
    Reviewed on 6/13/2025

    Dr.O’Day is absolutely awesome

    5 out of 5 stars
    Reviewed 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 stars
    Reviewed on 6/13/2025

    She's awesome

    5 out of 5 stars
    Reviewed 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 stars
    Reviewed 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 stars
    Reviewed on 5/25/2025

    Dr O Day is very knowledgeable and one of my favorite physicians.

    5 out of 5 stars
    Reviewed on 5/20/2025

    Dr. O’Day is very approachable.

    5 out of 5 stars
    Reviewed on 5/9/2025

    Dr O’Day is personable, efficient, and interested in my situation. Did not feel rushed.

    4 out of 5 stars
    Reviewed on 5/9/2025

    Very professional and caring

    5 out of 5 stars
    Reviewed on 5/8/2025

    Dr O'Day went into great detail to form a plan for my care.

    5 out of 5 stars
    Reviewed on 4/30/2025

    My doctor is the best 🙌

    5 out of 5 stars
    Reviewed 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 stars
    Reviewed on 4/26/2025

    Dr O'Day was both an expert in her field and very kind

    5 out of 5 stars
    Reviewed on 4/26/2025

    Dr. O'day is so understanding, kind and has so much patience.

    5 out of 5 stars
    Reviewed 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.