Associate Professor Dr Jeyakantha Ratnasingam

MMed (UM), Fellowship in Endocrinology (Australia), MD (UKM)


Clinic Schedule and Appointment List

  • Mon 19/10
    Not Available
  • Tue 20/10
    Not Available
  • Wed 21/10
    Not Available
  • Thu 22/10
    14:00 - 16:45
  • Fri 23/10
    Not Available
  • Sat 24/10
    09:00 - 11:15


Enquiry and Contact Details





Research and


  • 2020 Prolonged Exercise Test in Patients with History of Thyrotoxicosis
  • 2020 Maternal lipids are associated with newborn adiposity independent of GDM status, obesity and insulin resistance: a prospective observational cohort study
  • 2019 Role of Composite Glycemic Indices: A Comparison of the Comprehensive Glucose Pentagon Across Diabetes Types and HbA1c Levels
  • 2019 Malaysian Consensus Statement for the Diagnosis and Management of Acromegaly
  • 2017 Ratnasingam J, Lenders N, Ong B, Boros S, Russell AW, Inder WJ, Ho KKY. Predictors for secondary therapy after surgical resection of nonfunctioning pituitary adenomas. Clin Endocrinol (Oxf) 2017; 87: 717–724 doi: 10.1111/cen.13402 (ISI-Indexed)
  • 2017 Thuzar M, Phillip Law W, Ratnasingam J, Jang C, Dimeski G, Ho KK. Glucocorticoids Suppress Brown Adipose Tissue Function In Humans: A Double-Blind Placebo-Controlled Study. Diabetes Obes Metab 2017 doi: 10.1111/dom.13157. (ISI-Indexed)
  • 2017 Sii Hoe Leong, Shubash Shander, Jeyakantha Ratnasingam, Predicting recovery of the hypothalamic pituitary adrenal axis after prolonged glucocorticoid use, Endocr Pract 2018; 24 (1) (ISI-Indexed)
  • 2016 Lim, L.L., Shah, F.Z.M., Ibrahim, L., Paramasivam, S.S., Ratnasingam, J., Chan, S.P., Tan, A.T.B. and Vethakkan, S.R. Hypopituitarism in a Dengue Shock Syndrome Survivor without known Pituitary Adenoma, Tropical Biomedicine 2016, 33(4): 1–7 (ISI-Indexed)
  • 2016 Lim LL, Brnabic AJ, Chan SP, Ibrahim L, Paramasivam SS, Ratnasingam J, Vethakkan SR, Tan AT.The Relationship of HbA1c , Fasting, and Postprandial Hyperglycemia in Subjects with Type 2 Diabetes Mellitus in Malaysia. J Diabetes Investig 2016 doi: 10.1111/jdi.12596. [Epub ahead of print] (ISI-Indexed)
  • 2016 eyakantha Ratnasingam, Luqman Ibrahim, Sharmila Paramasivam, Lee Ling Lim, Alexander Tan Tong Boon, Shireene Vethakkan. Asymmetrical bone loss in a patient with poliomyelitis: an indication for anti-osteoporotic therapy Clinical Cases in Mineral and Bone Metabolism, 2016; vol 13(1):61 (SCOPUS-Indexed)
  • 2016 eyakantha Ratnasingam, Kheng Chiew Chooi, Syahrizan Samsuddin, Sharmila Paramasivam, Luqman Ibrahim, Lee Ling Lim,Alexander Tan, and Shireene Vethakkan (2016) VISUAL VIGNETTES-PERSISTENT HEADACHES WITH APPARENT EMPTY SELLA SYNDROME. Endocrine Practice In-Press. doi: (ISI-Indexed)
  • 2016 Venugopal Y, Hatta SFWM, Musa N, Rahman SA, Ratnasingam J, Paramasivam SS, Lim LL, Ibrahim L, Choong K, Tan ATB, Chinna K, Chan SP, Vethakkan SR. MAINTENANCE VITAMIN D3 DOSAGE REQUIREMENTS IN CHINESE WOMEN WITH POST MENOPAUSAL OSTEOPOROSIS LIVING IN THE TROPICS. Asia Pacific Journal of Clinical Nutrition. April 2016. doi: 0.6133/apjcn.042016.10 (ISI-Indexed)
  • 2015 S.S.Paramasivam, A.T.B.Tan, S.P.Chan, K.Chinna, J. Ratnasingam, L. Ibrahim, L.L.Lim, P.Tan, S.Z.Omar, S.R.Vethakkan. The effect of professional continuous glucose monitoring on glycaemic control and hypoglycaemia in insulin-requiring gestational diabetes mellitus. Diabetologia. 2015; 58.(Suppl 1):S74. DOI 10.1007/s00125-015-3687-4 (ISI-Cited Publication) (ISI-Indexed)
  • 2015 Lee Ling Lim, Normayah Kitan, Sharmila Sunita Paramasivam, Jeyakantha Ratnasingam, Luqman Ibrahim, Siew Pheng Chan, Alexander Tong Boon Tan and Shireene Ratna Vethakkan. PRKAR1A-negative familial Cushing s syndrome: two case reports. Journal of Medical Case Reports (2015) 9:277. DOI 10.1186/s13256-015-0757-7 (SCOPUS-Cited Publication) (SCOPUS-Indexed)


Fellowships, Memberships &

Professional Affiliations

  • Fellowship in Endocrinology, Brisbane, Australia
  • Council Member, Diabetes Malaysia
  • Committee Member Malaysian Osteoporosis Society
  • Member of the United Sates Endocrine Society
  • Life Member of the Malaysian Endocrine and Metabolic Society
  • The Malaysian Acromegalic Society (MyAcro), Member, 2013, (National)
  • Diabetes Malaysia, Council Member, 2013, (National)
  • THE ENDOCRINE SOCIETY, Membership, 2013, (International)


Awards and


  • Excellence Service Award, University Malaya, 2017, (University)
  • Early Career Travel Award, United States Endocrine Society, 2016, (International)
  • Young Investigators Runner Up Award, Asean Federation of Endocrine Societies, 2015, (International)
  • Travel Award, International Society of Endocrinology, 2012, (International)
  • American Diabetes Association Speaker Certification, American Diabetes Association, 2012, (International)
  • Young Investigators Award for Best Oral Presentation, Asean Federation of Endocrine Societies, 2011, (International)