Meet Our Providers

Providers at The Medical Group bring years of experience to your treatment and care.

Mark A. Castellaw, M.D.

College:
Bachelor of Science; University of Memphis
Graduate School:
medical school:
Graduate school:
University of Tennessee Health Science Center; 1981
RESIDENCY:
Baptist Memorial Hospital; 1986

Dr. Mark Castellaw joined Baptist Medical Group in 2013. He specializes in Internal Medicine and treats various acute and chronic health conditions.

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Mark A. Castellaw, M.D.

S. Todd Overby, M.D.

College:
Bachelor of Science, Biology and Chemistry; Mississippi College; 1992
Graduate School:
medical school:
Graduate school:
University of Mississippi School of Medicine; 1996
RESIDENCY:
University of Tennessee Health Sciences Center; 1999

Dr. Steven Overby specializes in Internal Medicine and Primary Care. He joined Baptist Medical Group in 2013.

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S. Todd Overby, M.D.

Steven Wener, M.D.

College:
Bachelor of Science, Biology; University of Maryland at College Park; 1993
Graduate School:
medical school:
Graduate school:
University of Tennessee College of Medicine; 1997
RESIDENCY:
University of Texas Health Science Center at San Antonio; 2000

Dr. Wener specializes in Internal Medicine and Primary Care at The Medical Group.

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Steven Wener, M.D.

Richard Jordan, M.D.

College:
Bachelor of the Arts; Vanderbilt University
Graduate School:
medical school:
Graduate school:
University of Tennessee, Knoxville; 1981
RESIDENCY:
Baptist Memorial Hospital, Memphis; 1984

Dr. Richard James Jordan specializes in Internal Medicine and Primary Care. He joined Baptist Medical Group in 2013.

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Richard Jordan, M.D.

L. Alison Pomykala, M.D.

College:
Summa Cum Laude with Bachelor of Arts, University of Tennessee, Knoxville, TN-1997
Graduate School:
medical school:
Graduate school:
Doctor of Medicine, University of Tennessee Health Science Center, Memphis, TN-2001
RESIDENCY:
University of Tennessee Health Science Center, Memphis TN-2001-2004

Dr. Lora Alison Pomykala is a board-certified physician who joined Baptist Medical Group in 2013. Dr. Pomykala specializes in Internal Medicine and treats both acute and chronic conditions in adults and teens ages 14 and older. She practices at Baptist Medical Group in Germantown, TN.

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L. Alison Pomykala, M.D.

Dana J. Wright, M.D.

College:
Graduate School:
medical school:
Graduate school:
University of Alabama School of Medicine, University of Alabama at Birmingham; 1975
RESIDENCY:
Baptist Memorial Hospital, Memphis; 1979

Dr. Wright specializes in Internal Medicine and Primary Care at The Medical Group.

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Dana J. Wright, M.D.

Jane Tyson, FNP, GNP

College:
Bachelor of Science, Biology; Millsaps College; 1981, Bachelor of Science, Nursing; University of Mississippi School of Nursing; 1983
Graduate School:

Master of Science, Nursing; Vanderbilt University School of Nursing; 1996

Post Master’s Certificate; Vanderbilt University School of Nursing; 2004

medical school:
Graduate school:
RESIDENCY:

Jane Tyson has been a gerontological nurse practitioner and family nurse practitioner at The Medical Group since 2006.

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Jane Tyson, FNP, GNP

Kamryn Wong, NP

College:
Bachelor of Science in Biology; Lipscomb University, Nashville, TN; 2020
Graduate School:
medical school:
Graduate school:
Master of Science in Nursing; Vanderbilt University School of Nursing (VUSN), Nashville, TN; 2022
RESIDENCY:
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Kamryn Wong, NP
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