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Mark Day, DO

Mark Day, DO

Optum Provider

Specialty

Family Medicine

Languages

English

Seeing patients at

Patient Reviews

Patient review summary

Learn about our survey

5

4

3

2

1

4.6

120 reviews

    • Reviewed on May 27, 2026
    • Verified Review

    He is informative and compassionate. He explains, helps and cares

    • Reviewed on May 22, 2026
    • Verified Review

    He has been my doctor for many years and has taken great care of me. He has always been professional, direct, and always listens. Since 1998, I have not had one complaint about his care. He’s an excellent doctor.

    • Reviewed on May 18, 2026
    • Verified Review

    Dr. Day always takes the time with me to answer my questions and go over the results of my tests. He puts me at ease and is friendly to talk to.

    • Reviewed on May 15, 2026
    • Verified Review

    Very helpful, professional

    • Reviewed on May 14, 2026
    • Verified Review

    Professional calm very informative re: meds

    • Reviewed on May 6, 2026
    • Verified Review

    Dr. Day has been my Family Doctor for greater than 30 years. He is the Complete Package of the Ideal Family Physician. I would not change anything about his care/medical attention!!

    • Reviewed on Apr 30, 2026
    • Verified Review

    Yes

    • Reviewed on Apr 30, 2026
    • Verified Review

    Because he's always thorough and friendly

    • Reviewed on Apr 27, 2026
    • Verified Review

    I have always been very satisfied with Dr. Day's service

    • Reviewed on Apr 26, 2026
    • Verified Review

    Dr. Day provided me with all the information I needed to know and also a very caring person.

    • Reviewed on Apr 26, 2026
    • Verified Review

    Dr. Day took the time to cover all the bases.

    • Reviewed on Apr 11, 2026
    • Verified Review

    Very caring, always has helpful information to help with your medical problems

    • Reviewed on Apr 9, 2026
    • Verified Review

    always listens and offers advice and solutions

    • Reviewed on Apr 8, 2026
    • Verified Review

    He cares.

    • Reviewed on Apr 7, 2026
    • Verified Review

    He is my primary + always helpful + professional.

    • Reviewed on Apr 6, 2026
    • Verified Review

    HIS KNOWLEDGE AND CARING FOR MY BEST INTERESTS, Respectful and professional a caring Doctor,He makes me feel like Family, He's the best in every way. THANKS DOCTOR Day you are the BEST.

    • Reviewed on Apr 2, 2026
    • Verified Review

    Explaining things in a way that is easy to understand

    • Reviewed on Mar 30, 2026
    • Verified Review

    Kindness knowledgeable patient interested in patient spirals clearly

    • Reviewed on Mar 29, 2026
    • Verified Review

    good doctor

    • Reviewed on Mar 29, 2026
    • Verified Review

    Nice and friendly

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  • About Mark Day, DO

    Mark Day, DO, is a family medicine physician who cares for patients of all ages. His clinical interests include chronic disease management, diabetes care, geriatric health, men's and women's health, and mental health. Dr. Day completed his family medicine training through Broadlawns Medical Center and the University of Iowa.

    Philosophy of care

    Dr. Day believes great healthcare means understanding the whole person, not just their symptoms. He takes time to listen, build trusting relationships, and partner with patients on their health goals. His approach is rooted in compassion, respect, and personalized care tailored to each patient's unique needs.

    Gender

    Male

    Board certifications

    American Board of Family Medicine

    Licenses

    NV, 656

    Employed or contracted

    Employed

    Network Name

    OptumCare Network of Nevada

    PCP ID

    UHC HMO & D-SNP ID - 00010011423, UHC PPO ID - 00010671426, Humana ID - 000408000A

    NPI

    1164436994

    Hospital affiliations

    MountainView Hospital