
Gastroenterology · Hepatology · Internal Medicine
Dr. Ong Tze Zen is a distinguished Consultant Physician and Gastroenterologist & Hepatologist, also serving as the Medical Director of KPJ Kajang Specialist Hospital. With extensive experience since 1995, he excels in diagnosing and treating complex digestive and liver disorders. Dr. Ong is a passionate advocate for public health, notably championing the 'Find the Missing Millions' initiative for World Hepatitis Day, demonstrating his commitment to patient education and preventative care.
Inang Jamili Nasron (Ole Ms Nan)
November 25, 2025 at 4:39 PM
I am a patient to 3 doctors here. Dr Sahrir, Dr Ong n Dr Syahrizan. Excellent doctors! Was warded last year and this year as well. Best service. Just that it takes time to be discharge due to insurance procedures, but that's normal.
KENNETH SideBySide Associates
November 25, 2025 at 4:38 PM
My family and I have been having periodic treatments at KPj Kajang for quite some time now. The latest for me being to see Dr Ramani ENT, very cool n nice indeed not to mention listens n questions to be clear in his diagnosis. His asst Mdm Malathy too was very helpful. Both thorough. Would like to mention Dr Lim Kheng Boon (Neph) for my son and especially Dr Ong Tze Zen (Gastro/Hepa) for my daughter and I. Good doctors indeed. Some rearrangements to add in sofas, coffee machine for our comfort is beneficial. Admin process so far has been smooth only sometimes the waiting, as normal. Thanks for attending to us. Kenneth.
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V santha Kay
November 25, 2025 at 4:37 PM
I was admitted on the 30/9 To 4/10/25 in the Violet ward under the attending DR. Ahmad Sudirman. I must mention that I had a pleasant stay in the hospital. The ward nurses and the doctor in charge were very helpful and attentive. Prior to that I was attended by Dr Ong Tze Zen who was also good in explaining my issues and recommended a followup, Thanks to the whole team there. All the best.
Khairul Azmir Abdullah
November 25, 2025 at 4:35 PM
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