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Dr Siaw Tung Yeng

About the Company:

Ranked #3 Health Care & Life Sciences company in Financial Times 2024 listing of 500 High-growth Asia-Pacific Companies, we are the first telehealth provider from the Asia-Pacific region to be listed in the US. Through our MaNaDr platform, we offer personalized and reliable medical attention to users worldwide.


Our platform allows our community of healthcare providers to have a broader reach to users through virtual clinics without any start-up costs and the ability to connect to a global network of peer-to-peer support groups and partners.


Our range of seamless and hassle-free telehealth solutions includes teleconsultation services, prescription fulfillment and other personalized services such as weight management programs and gender-specific care.


For more information, please visit


Manadr Pte Ltd








2 Venture Drive #07-06/07 Vision Exchange

Dr Siaw Tung Yeng
"Everyone deserves the best healthcare"

About the

Founder / Director:

Dr Siaw Tung Yeng, PBM, Senior Consultant Family Physician


Siaw Tung Yeng, our co-founder and director, has served as the Co-Chief Executive Officer since our inception in 2016. Dr. Siaw has more than 30 years of professional experience in healthcare and medical informatics, and has been a senior consultant in family medicine since 2004.


Dr. Siaw has also been complementing his work as a physician with IT knowledge for over 20 years. Prior to founding the Company, Dr. Siaw served as chief information officer, chairman of medical audit subcommittee and regional medical director of Healthway Medical Group from 2000 to 2004. Healthway Medical Group has one of the largest networks of clinics and medical centers in Singapore, operating more than 100 clinics and medical centers.


From 2004 to 2020, Dr. Siaw served as a director overseeing the operation of United Vision Holdings Pte Ltd, which owns several family medicine clinics across Singapore. During the same period, Dr. Siaw also served as a senior consultant family physician of Healthmark Family Medicine Clinic managed by United Vision Holdings Pte Ltd, where he was in charge of delivering comprehensive, continuing and holistic care of all patients in the context of family practice.


From 2006 to 2021, Dr. Siaw had been a medical director at Gloco Pte Limited Singapore, which provides health IT services since 2006. Since 2013, Dr. Siaw has been an examiner for Graduate Diploma in Family Medicine. He was also a clinical lecturer (Family Medicine) for Yong Loo Lin School of Medicine, National University of Singapore from 2013 to 2020.


Dr. Siaw graduated from the National University of Singapore with a Bachelor of Medicine, Bachelor of Surgery degree in 1991 and a Master of Medicine degree in 1995. He was also awarded fellowship at the College of Family Physician in 2000.


Currently, Dr. Siaw also serves as a member of Singapore Medical Council’s Complaints Panel, a member of Singapore Medical Council’s Disciplinary Committee, a senior consultant family physician of HealthLight Family Medicine Clinic, an examiner in Graduate Diploma in Family Medicine examination, and an advisor of Singapore Family Medicine Continuing Medical Education.


Dr Rachel Teoh Pui Pui, PBM, Family Physician


Teoh Pui Pui, our co-founder, director and Chairwoman of the Board, has been our Co-Chief Executive Officer and Chief Operating Officer since 2019 and is primarily responsible for developing and implementing business strategies, managing relationships with key stakeholders and overseeing the day-to-day operations of the organization.


Dr. Teoh is also our medical doctor in charge of medical diagnosis and treatment. Dr. Teoh also serves as the director of EC Family Clinic and the director of Punggol Ripples Family Clinic in Singapore. In these roles, Dr. Teoh is primarily responsible for the management of the clinics, overseeing the clinics’ strategic objectives, policies and overall directions. From 2004 to 2007, Dr. Teoh served as an instructor in Advance Trauma Life Support.


From 2003 to 2007, Dr. Teoh served as the surgical resident (general surgery and hand surgery) of National Healthcare Group, which is a leader in public healthcare in Singapore and recognized for the quality of its medical expertise and facilities.


Dr. Teoh was a member of the American Academy of Family Physicians from 2013 to 2017 and an academy member of International Master Course on Aging Science Asia from 2016 to 2017. She currently serves as an associate of American Aesthetic Association, a member of American Society for Laser Medicine and Surgery, Inc, and a member of American Academy of Aesthetic Medicine.


Dr. Teoh graduated with a Bachelor of Medicine, Bachelor of Surgery degree from National University of Singapore in 2002, a Post Graduate Diploma in Practical Dermatology from Cardiff University, UK in 2010, a Post Graduate Diploma in Family Medicine from National University of Singapore in 2011, and a Post Graduate Diploma in Aesthetic Medicine from American Academy of Aesthetic Medicine in 2016.


She also holds various certificates, including the Certificate of Accreditation Family Physician awarded by the Ministry of Health of Singapore, the Certificate of Registration Family Physician awarded by the Singapore Medical Council, as well as Certificate in Aesthetic Medicine and Certificate in Mesotherapy awarded by the American Academy of Aesthetic Medicine.

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