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      Dr. Ong Tze Zen

      GastroenterologyHepatologyInternal Medicine
      ⭐4.1(14 reviews)
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      Dr. Ong Tze Zen

      Dr. Ong Tze Zen

      Gastroenterology · Hepatology · Internal Medicine

      31 years experience
      ·
      4.1 (14 ratings)

      About Doctor

      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.

      Qualifications

      • MBBS
      • MRCP
      • MMed (Internal Medicine)
      • FAMS (Gastroenterology)

      Languages Spoken

      English
      Malay
      Mandarin
      Indonesian

      Patient Reviews

      4.1
      14 reviews
      A

      Shalini Pariasamy

      April 9, 2026 at 1:36 AM

      5/5
      Google Review

      Did my endoscopy procedure due to gerd under Dr. Ong Tze Zen at KPJ Specialist Kajang. Special thanks to the endoscopy staffs, Ms Vicky, Ms Lee and Ms Dila. They took effort to manage my anxiety before the procedures, provide clear instructions, and ensure comfort before, during, and after endoscopy. The whole endoscopy staff here, including nurses and doctor are highly skilled, caring, and professional. Overall, I am very grateful for the excellent care and service received.

      A

      Hor Chenteck

      March 20, 2026 at 12:18 PM

      5/5
      Google Review

      Staff very good... Vicky, Lai, Susmitha, Lai Lee, Dila, everyone served me very well. Dr. Ong also very good, Doctor.

      A

      Akmal Hazwani

      January 28, 2026 at 3:13 PM

      5/5
      Google Review

      Great service from registration all the way to discharge. A big thank you to Dr Ong for the expert advice and care, and to the nurses Vicky, Lai, Lee, and Susmitha for being so kind and helpful.

      A

      Inang Jamili Nasron (Ole Ms Nan)

      November 25, 2025 at 4:39 PM

      5/5
      Google Review

      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.

      A

      KENNETH SideBySide Associates

      November 25, 2025 at 4:38 PM

      5/5
      Google Review

      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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      Affiliated Hospitals

      KPJ Kajang Specialist Hospital

      KPJ Kajang Specialist Hospital

      Kajang, Malaysia

      4.9
      View Hospital →
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      Affiliated Hospitals
      KPJ Kajang Specialist Hospital

      KPJ Kajang Specialist Hospital

      Kajang, Malaysia

      4.9
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