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Picture of Marshall Browning Medical Clinic.
Picture of Marshall Browning Medical Clinic.

Marshall Browning Medical Clinic


The Marshall Browning Medical Clinic is located on the southwest corner of the hospital campus. It is a Rural Health Clinic which offers internal medicine, family practice, and psychiatry services.

  • Robert Davidson, M.D., Family Practice


    Dr. Davidson has been practicing medicine for over 30 years and is board certified in family practice. He cares for both children and adults.


  • David Yablonsky, D.O., Internal Medicine

    Dr. Yablonsky is a board certified internist. He is trained to diagnose and treat complex acute and chronic diseases in almost every adult organ system. His focus is on disease prevention and health optimization.



  • Mariah Charles, M.S.N., A.P.N., F.N.P.-BC, Family Practice

    Mariah is a board certified family nurse practitioner. She is trained in diagnosis, treatment and evaluation of routine to acute illnesses. She treats both children and adults seeking general medical care.



  • Danielle Klump, M.S.N., A.P.N., F.N.P.-BC, Family Practice

    Danielle is a board certified family nurse practitioner, trained in diagnosis, treatment and evaluation of routine to acute illnesses. While addressing your general and specific health concerns, Danielle also administers wellness checkups, school and DOT physicals. Danielle treats both children and adults with special interests in cardiology.



The Medical Clinic is open the following hours for primary care:


Monday: 8:00 a.m. - 4:30 p.m.
Tuesday: 8:00 a.m. - 4:30 p.m.
Wednesday: 8:00 a.m. - 4:30 p.m.
Thursday: 8:00 a.m. - 4:30 p.m.
Friday: 8:00 a.m. - 4:30 p.m.


Psychiatry services are provided by Sandra Tate, PMHNP, APN, CS, and D. Tomlianovich, PMHNP, MSN, FNP on the second and fourth Thursdays each month from 8:00 a.m. to 4:30 p.m. For an appointment, call 618-292-9999.

Accepting new patients including Medicare and Medicaid. For an appointment, call (618) 542-1050.

David Yablonsky, D.O., serves as the Medical Director of the Marshall Browning Medical Clinic and the Marshall Browning Family Health Center.

Providers furnishing services at the Medical Clinic are independent contractors and are not employees of Marshall Browning Hospital with the exception of Mariah Charles, MSN, APN, FNP-BC; Danielle Klump, MSN, APN, FPA, FNP-BC.
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