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Zsuzsanna McMahan, M.D., M.H.S.

Zsuzsanna Hortobagyi McMahan, M.D., M.H.S.

Headshot of Zsuzsanna McMahan
  • Associate Professor of Medicine

Specializes in: Adults (18+ years)


Languages: English, Hungarian, Spanish


Rheumatology, Scleroderma

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Johns Hopkins Bayview Medical Center

Appointment Phone: 443-997-1552
5501 Hopkins Bayview Circle
Asthma and Allergy Center
Baltimore, MD 21224 map
Phone: 410-550-7715 | Fax: 410-550-1363

Johns Hopkins Bayview Medical Center

5501 Hopkins Bayview Circle
Asthma and Allergy Center 1B.1
Baltimore, MD 21224 map


Dr. Zsuzsanna McMahan is an assistant professor of medicine at the Johns Hopkins University School of Medicine. Her areas of clinical expertise include rheumatology and scleroderma. 

Dr. McMahan received her M.D. degree from the University of Texas Medical School at Houston. She completed her internship and residency training in internal medicine at the University of Texas Southwestern Medical Center and a post-doctoral fellowship in rheumatology at Johns Hopkins. During her rheumatology fellowship, she earned her master of health science in clinical investigation at the Johns Hopkins Bloomberg School of Public Health.

Upon completing her fellowship in June 2012, Dr. McMahan joined the Johns Hopkins Scleroderma Center as full-time faculty. Supported by the Rheumatology Research Foundation Scientist Development Award and the Maryland Stem Cell Research Fund, she currently focuses 80 percent of her time on conducting translational research under the mentorship of Drs. Antony Rosen, Livia-Casciola-Rosen and Fredrick Wigley.

Dr. McMahan’s research focuses specifically on novel antigen identification in scleroderma and defining the target tissue in this disease. The remainder of her academic time is allocated toward patient care and education.

Dr. McMahan is a member of the American College of Rheumatology and has served on numerous committees within that organization, including the fellow’s subcommittee and the committee on workforce and training. She was a member of the ACR board of directors in 2014. more


  • Associate Professor of Medicine

Departments / Divisions

Centers & Institutes



  • MD; University of Texas Health Science Center at Houston (2006)


  • Internal Medicine; University of Texas Southwestern Medical Center at Dallas (2009)


  • Rheumatology; Johns Hopkins University School of Medicine (2012)

Board Certifications

  • American Board of Internal Medicine (Rheumatology) (2012)

Research & Publications

Research Summary

Dr. McMahan is involved in translational research, and her research focuses on blood vessel development and rheumatic diseases with a special interest in scleroderma.

Selected Publications

View all on PubMed

Nagaraja V, McMahan ZH, Getzug T, Khanna D. “Management of gastrointestinal involvement in scleroderma.” Curr Treatm Opt Rheumatol. 2015 Mar 1;1(1):82-105.

McMahan ZH, Bingham CO 3rd. “Effects of biological and non-biological immunomodulatory therapies on the immunogenicity of vaccines in patients with rheumatic diseases.” Arthritis Res Ther. 2014 Dec 23;16(6):506. doi: 10.1186/s13075-014-0506-0.

McMahan ZH, Wigley FM. “Novel investigational agents for the treatment of scleroderma.” Expert Opin Investig Drugs. 2014 Feb;23(2):183-98. doi: 10.1517/13543784.2014.848852. Epub 2013 Nov 22.

Nadal R, McMahan ZH, Antonarakis ES. “Paraneoplastic palmar fasciitis and polyarthritis syndrome in a patient with advanced prostate cancer.” Clin Genitourin Cancer. 2013 Dec;11(4):e15-23. doi: 10.1016/j.clgc.2013.05.008. Epub 2013 Jun 29.

McMahan ZH, Hummers LK. “Systemic sclerosis--challenges for clinical practice.” Nat Rev Rheumatol. 2013 Feb;9(2):90-100. doi: 10.1038/nrrheum.2012.191. Epub 2012 Nov 13.

Academic Affiliations & Courses

Courses and Syllabi

  • Clinical Epidemiology Journal Club, Instructor, JH Bayview
  • Genes to Society, Small group instructor, Johns Hopkins Medical School
  • Clinical Research Methods Journal Club, instructor to fellows, JH Bayview
  • Rheumatology Summer Lectures for First Year Fellows, Instructor, JH Bayview
  • Genes to Society, Small group instructor, Johns Hopkins Medical School
  • Clinical Epidemiology Journal Club, Instructor, JH Bayview
  • Rheumatology Summer Lectures for First Year Fellows, Instructor, JH Bayview
  • Genes to Society, Team based learning instructor, Johns Hopkins Medical School
  • Genes to Society, Team based learning instructor, Johns Hopkins Medical School

Activities & Honors


  • University of Texas Academic Honors Award, The University of Texas at Austin, 2000
  • Chi Omega Eleusinian Community Service Award, The University of Texas at Austin, 2000
  • Gianotti Scholarship, UT Houston Medical School, 2000
  • Merck Award, UT Houston Medical School, 2002
  • Distinguished Fellow Award, American College of Rheumatology, 2012
  • Scientist Development Award, Rheumatology Research Foundation, 2012


  • American College of Rheumatology

    Dr. McMahan has been actively involved in the ACR since 2009.  She served on the ACR Fellow’s Subcommittee (FSC) from 2009-2011, during which time she was the Fellow Representative on the Annual Meeting Planning Committee (AMPC) and developed the ACR Knowledge Bowl. She was invited to return as a full member of the AMPC for 2012-2014.  Dr. McMahan was also chair of the FSC from 2011-2012. During her time in this position she served on the ACR Committee on Workforce and Training.  Dr. McMahan was also an active participant on the ACR 2020 Task Force (2011) and participated in the development of the ACR Strategic Plan (2013). She was subsequently invited to join the ACR Board of Directors in 2013 as the young member representative.

  • American Medical Association

Professional Activities

  • ACR Session Chair and co-moderator for Clinical Review Session: Immunizations and Rheumatic Diseases, 2010 - 2010
  • ACR Co-chair for the Thieves Market; moderator in 2010, 2010
  • Annual Meeting Planning Committee (AMPC) Clinical subcommittee, member, 2011 - 2013
  • ACR Session Co-chair and Moderator for Medical Aspects: Anemia of Inflammatory Disease, 2011 - 2011
  • ACR Session Chair ACR Knowledge Bowl, 2012 - 2012
  • ACR Session Chair Medical Aspects: Immune-Mediated Glomerular Disease, 2012 - 2012
  • ACR session coordinator for Thieves Market, Curbside Consults, Medical Aspects (Thrombotic Microangiopathies), State-of-the-Art (Winning at Clue), Knowledge Bowl, Scleroderma Vasculopathy (CS), 2013 - 2013
  • ACR Strategic Planning Committee, 2013 - 2013
  • ACR State-of-the-Art (SOTA), Planning Committee, 2014
  • ACR Board of Directors, 2014
  • Annual Meeting Planning Committee (AMPC), fellow representative, 2009 - 2011
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