One Medical Staff

 Our Motto is “The patient always comes first.”

The One Medical team are some of the most caring and helpful people you will ever meet. We invite you to meet our staff in person when you get the chance.

One Medical of Sherman Texas has permanent, full-time physicians on staff, so you and your family can develop a relationship with your doctor. They are independent practitioners who provide a full range of primary and urgent care services. Our qualified full-time physicians are residency trained in Family Practice, Emergency Medicine and/or Urgent Care Medicine.

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One Medical Staff Physicians:

  • Mark Buckner
    M.D. F.A.A.E.M. · Board Certified Emergency Medicine

    Dr. Buckner has been practicing Emergency Medicine and Urgent Care in Texoma area for over 27 years.
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    He attended and graduated from University Of Texas Medical School At San Antonio in 1983, having over 36 years of diverse experience, especially in Physical Medicine And Rehabilitation.
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  • Quyen Johnson

    Quyen Johnson NP is a nurse practitioner in Sherman, TX. She specializes in nursing (nurse practitioner).
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