Dr Lawrence Ong

Clinical Immunologist and Allergist

B Psychol (Hons), MBBS (Hons), FRCPA, FRACP, PhD


Dr Ong is a Clinical Immunologist and Allergist whose clinical practice encompasses allergic, autoimmune disease and primary immunodeficiency. His clinical interests include diagnosis and management of allergic rhinitis, chronic spontaneous urticaria and autoimmune diseases such as Sjogren’s syndrome and systemic lupus erythematosus.


Dr Ong trained in Clinical Immunology, Allergy and Immunopathology at St Vincent’s and Westmead Hospitals. He obtained an NHMRC scholarship to complete his PhD studies in the epigenetics of autoimmune disease, which he obtained in 2020. He has published his research in several peer reviewed journals and continues to be actively involved in basic science and clinical research.


Dr Ong is located at our Miranda clinic.




Dr Ong holds a Staff Specialist appointment at Westmead and Blacktown Hospitals and is a Clinical Senior Lecturer at the University of Sydney and Conjoint Lecturer at Western Sydney University. He is also a member of the Australasian Society of Clinical Immunology and Allergy.


  • 2004 B Psychology (Hons), University of Sydney
  • 2009 MBBS (Hons), University of Sydney
  • 2020 PhD, University of Sydney

Memberships and committees

  • Royal Australasian College of Physicians
  • Australian Society of Clinical Immunology
  • The Royal College of Pathologists of Australasia
  • American Academy of Allergy Asthma & Immunology

Featured publications

Ong, L. T. C., Booth, D. R., Parnell, G. P. Vitamin D and its effects on DNA methylation in development, aging and disease. (2020) Molecular Nutrition and Food Research. 2000437


Ong, L. T. C., Parnell, G. P., Veale, K., Stewart, G. J., Liddle, C., Booth, D. R. (2020) Regulation of the methylome in differentiation from adult stem cells may underpin vitamin D risk in MS. Genes and Immunity. 1-13


Ong, L.T.C., Parnell, G.P., Afrasiabi, A., Stewart, G. J., Swaminathan, S., Booth, D. R. (2019) Transcribed B lymphocyte genes and multiple sclerosis risk genes are underrepresented in Epstein-Barr Virus hypomethylated regions. Genes and Immunity. 16, pp. 1-9


Ong, L. T. C., Nachbur, U., Rowczenio, D., Ziegler, J. B., Fischer, E., Lin, M. W. (2017) A novel nucleotide oligomerization domain 2 mutation in a family with Blau Syndrome: Phenotype and function. Innate Immunity, 23(7), pp. 578-583


Ong, L. T. C., Galambos, G., Brown, D. (2017) Primary Sjogren’s syndrome manifesting as treatment resistant obsessive compulsive disorder. Frontiers in Psychiatry, 8, pp.124

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