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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

134 reviews

    • Reviewed on May 30, 2026
    • Verified Review

    Great PCP

    • Reviewed on May 30, 2026
    • Verified Review

    DR. Day is always very helpful, understanding, patient & knowledgeable.

    • 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 is personable and interested in my needs as a patient.

    • 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 20, 2026
    • Verified Review

    he is very caring doctor and give me answers to all the question i need

    • 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

    I like Dr. Day very much and would recommend him to anyone. He is excellent.

    • Reviewed on May 15, 2026
    • Verified Review

    Very professional,courteous, knowledgeable,empathetic and genuinely concerned about my health needs.

    • Reviewed on May 15, 2026
    • Verified Review

    Very helpful, professional

    • Reviewed on May 14, 2026
    • Verified Review

    Honesty and professional 👌 Definitely blessed with him. [omitted]

    • Reviewed on May 14, 2026
    • Verified Review

    Professional calm very informative re: meds

    • Reviewed on May 13, 2026
    • Verified Review

    Dr Day is the only reason I'm with Southwest

    • Reviewed on May 9, 2026
    • Verified Review

    Professional and knowledgeable

    • Reviewed on May 9, 2026
    • Verified Review

    He covered my labs very efficiently describing the high and low values. He knew that I had worked in the medical laboratory field previously and as he talked, he seemed to respect the fact that he was presenting. He also allowed me to ask questions and discussed activities that I could do to affect some of the values.

    • Reviewed on May 8, 2026
    • Verified Review

    Great human being ,besides of being a great doctor that not only cares about the sickness but also about the prevention.

    • 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 May 5, 2026
    • Verified Review

    He is the best PCP i deal with in last [omitted].

    • Reviewed on May 4, 2026
    • Verified Review

    This doc is a nugget of gold. Never let him go!

    • Reviewed on May 2, 2026
    • Verified Review

    Very informative explaining the results of my medical resultff sf

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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