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Johanna Gebhart med.univ. PhD Johanna Gebhart

T: +43 (0)1 40400-44970
F: +43 (0)1 40400-40300

Ap.Prof. Johanna Gebhart, PhD completed her training as a specialist in internal medicine at the Division of Hematology and Hemostaseology, Department of Internal Medicine I (Medical University of Vienna/Vienna General Hospital) and is currently training to become a specialist in hematology and oncology. She completed her PhD studies in 2015 and habilitated in internal medicine in 2018.

Her scientific focus is on blood coagulation research (congenital blood coagulation disorders/bleeding tendencies of unknown cause) and platelet research (platelet dysfunction, primary immune thrombocytopenia). As Principal Investigator, she co-initiated and leads prospective cohort studies such as the Vienna Bleeding Biobank (VIBB) to investigate the pathophysiology of bleeding tendencies of unknown cause and hereditary blood coagulation disorders, as well as the Vienna ITP Biobank to record and characterize patients with primary immune thrombocytopenia: patients with primary immune thrombocytopenia, as well as the Lupus Anticoagulant and Thrombosis Study, which investigates risk factors for clinical manifestations in patients with positive lupus anticoagulant or antiphospholipid antibodies. antiphospholipid antibody syndrome. Prof. Gebhart also acts as Principal Investigator in clinical studies (phase I to IV) in the field of immune thrombocytopenia.

Her scientific work has taken her to international research centers at the University of North Carolina at Chapel Hill, NC, USA (2014) and to the Eberhart Karls University in Tübingen, Germany (2019-2020).

Prof. Gebhart is a member of guideline committees and consensus groups for the development of treatment guidelines on the subject of primary immune thrombocytopenia. She is active in various functions in professional societies and scientific journals both nationally and internationally. She is fully committed to supervising students on clinical topics in the field of hemostaseology as well as diploma and PhD students in the PhD programs of the Medical University of Vienna.


  • Specialist in internal medicine
  • In training as an additional specialist in hematology and internal oncology

Focus on clinical research:

  • Congenital blood coagulation disorders/von Willebrand syndrome
  • Bleeding tendencies of unknown cause
  • Platelet dysfunction
  • Primary immune thrombocytopenia
  • Lupus anticoagulant and antiphospholipid antibody syndrome

Focus on basic research:

  • Role of fibrinolysis in primary ITP and bleeding tendencies
  • Pathophysiology of bleeding tendencies of unknown cause
  • Platelets in bleeding tendencies
  • Platelet dysfunction
  • Characterization of blood clot properties
  • Protein disulfide isomerases (PDIs)

 Membership of the following professional societies:

  • International Society on Thrombosis and Haemostasis (ISTH)
  • Society for Thrombosis and Haemostasis Research (GTH)
  • European Hematology Association (EHA)
  • Austrian Society for Hematology & Oncology (OeGHO)
  • Austrian Society for Internal Medicine (ÖGIM)

Functions in professional societies:

  • Co-chair in the "Scientific and Standardization Committee (SSC) on Lupus Anticoagulant and antiphospholipid antibodies, International Society on Thrombosis and Haemostasis" (ISTH), 2018-ongoing
  • Organizing Committee of the GTH Annual Meeting 2024 as Scientific Secretary

Functions in journals:

Advisory Board "Haemostaseology"


  • 2020 Jubiläumsfonds der Österreichischen Nationalbank
  • 2020 Preis des Medizinisch-Wissenschaftlichen Fonds des Bürgermeisters der Bundeshauptstadt Wien (Medizin)
  • 2019 Rudolf-Marx-Stipendium der „Gesellschaft für Thrombose und Hämostaseforschung (GTH)“
  • 2018 Hans Egli Stipendium, Gesellschaft für Thrombose und Hämostaseforschung (GTH)
  • 2016 Förderpreis für kardiovaskuläre Forschung, Hans und Blanca Moser Stiftung und ÖKG
  • 2016 Dissertationspreis, Verein zur Förderung von Wissenschaft und Forschung (vfwf)
  • 2015 Young Investigator Award der „International Society on Thrombosis and Haemostasis“ (ISTH)
  • 2011 Bayer Haemophilia Clinical Training Award

Pubmed Publication list