top of page


Cornerstone Asia Health (CAH) is a medical group that provides multidisciplinary healthcare services across different specialisations. CAH offers a range of services including gastroenterology, urology, ophthalmology, dermatology as well as family medicine.

CAH multidisciplinary model enables the group to provide more holistic care for your overall well-being.


  • MBBS (Singapore)

  • MMed (Int Med)

  • FAMS

  • MRCP (UK)

  • FRCP (Edinburgh)


Dr Ng Tay Meng graduated from the University of Singapore in 1983 and underwent postgraduate specialist training in Internal Medicine and Gastroenterology.

He attained the Master of Medicine (MMed) and became a member of the Royal College of Physicians (FRCP) in 1989.


Dr Ng spent a year in 1994 at the National Medical Laser Centre in London, United Kingdom where he underwent intensive and comprehensive training in all aspects of therapeutic and interventional gastrointestinal endoscopy, including endoscopic laser therapy of Gastrointestinal Cancer.


In the area of research, Dr Ng had performed several clinical trials and published scientific papers on gastrointestinal and liver diseases. He was awarded the prestigious Young Investigator Awards in 1996 and 1998 in the Asia-Pacific Digestive Disease Week.


Dr Ng was also the vice president of the Singapore Gastroenterological Society (2000 - 2001) and has sat on several committees and presented scientific papers and lectures both locally and overseas.


Dr Ng Tay Meng was a senior consultant gastroenterologist and head of the gastrointestinal endoscopy service at Changi General Hospital before setting up his own private practice at Gleneagles Medical Centre in 2003.

Dr Ng Tay Meng


  • Board Certified Urologist

  • MBBS (Singapore)

  • FRCS (Edinburgh and Glasgow)

  • FICS

  • FAMS (Urology)


Dr Ho Siew Hong graduated from the National University of Singapore before obtaining his fellowships in surgery from the Royal Colleges of Surgeons (FRCS).


He also completed an advanced urology specialty training in Singapore and was conferred a member to the Academy of Medicine, Singapore (FAMS).


He obtained his overseas fellowship in endourology and laparoscopy at Westmead Hospital in Sydney, Australia. He returned to Changi General Hospital in Singapore and developed the percutaneous and laparoscopic urological surgery.


He was further trained in laparoscopic radical prostatectomy at Institut Mutualiste Montsouris, Paris, France before advancing to robotic assisted prostate surgery. Dr Ho is one of the 15 accredited Da Vinci robotic surgeons in Singapore.


Dr Ho manages urology problems in adult and children. He has a subspecialty in minimally invasive (laparoscopy) surgery and robotic assisted surgery. He has interests in kidney and prostate cancers, stone diseases and male fertility issues.


Dr Ho is active in research and teaching, having conducted numerous presentations and published various regional and international peer-reviewed journals.


He has also trained numerous urologists from Indonesia, Myanmar, Philippines and India, under the SUA Fellowship Programme.

Dr Ho Siew Hong


  • MBBS (Singapore)

  • MMed (Ophthalmology, Gold Medal)

  • FRCS (Edinburgh)

  • FAMS


Dr Bobby Cheng is a senior ophthalmic surgeon in Cataract and Comprehensive Ophthalmology. He also
subspecialises in the fields of Vitreoretinal Medicine and Surgery, and Uveitis.


Dr Cheng obtained his medical degree from the National University of Singapore in 1993. He then went on to specialise in the field of ophthalmology and won the prestigious Gold Medal Award in Master of Medicine (MMed) – Ophthalmology in 2000.


He was also admitted as a Fellow of the Royal College of Surgeons of Edinburgh (FRCSEd) and Academy of Medicine, Singapore (FAMS).


He subsequently completed his training in two ophthalmic subspecialties; vitreoretinal medicine and surgery, ocular inflammation and immunology.


He was awarded the Singapore National Eye Centre (SNEC) overseas scholarship to do a fellowship in ocular inflammation and immunology with Professor JV Forrester at the University of Aberdeen, Scotland in 2002. Upon his return, he completed a one-and-a-half-year local fellowship programme in vitreoretinal medicine and surgery at SNEC.


Dr Cheng is an active clinician, researcher and teacher, having presented over 50 talks in international and regional conferences.


He has published more than 20 peer-reviewed journals including Archives Ophthalmology, American Journal of Ophthalmology, British Journal of Ophthalmology and Retina.

Dr Bobby Cheng


  • MBBS (Singapore)

  • MRCP (UK)

  • FAMS (Dermatology)


He graduated with a medical degree from the National University of Singapore in 1989 and subsequently underwent postgraduate training in Internal Medicine and became a Member of Royal College of Physicians (UK) in 1993. He then went on to receive dermatology training at the National Skin Centre (NSC) in Singapore and did his dermatology fellowship at Massachusetts General Hospital, a teaching hospital for Harvard Medical School.


Dr Lawrence Khoo has special interest in the care of psoriasis patients, patients requiring phototherapy, aesthetic and laser surgery.

Dr Khoo is also one of the founding directors of Aesthetic Dermatology Educational Group which is actively involved in the teaching of various dermatologic procedures.

Dr Lawrence Khoo


  • MBBS (Singapore)

  • MMed (Family Medicine)

  • Grad Dip (Occupational Medicine)

  • DFD (Singapore)


Dr Geoffry Seah graduated with MBBS from the National University of Singapore in 1989, he went on to obtain a Master in Medicine (Family Medicine) in 2000. He also holds a Graduate Diploma in Occupational Medicine and is a qualified designated factory doctor.


Dr Seah has extensive experience in corporate medical care, having been appointed as a company doctor for various hotels, multinational corporations and local companies.


He is familiar with the specific corporate medical needs and has organized regular health screenings, mass vaccinations and health talks.


He has also assisted in the setting up of in-house clinics for an overseas resort in Maldives and a luxury cruise liner.

Dr Seah was active in teaching as well, having been appointed adjunct tutor for NUS Medical School undergraduate Family Medicine programme between 1998 and 2000.

Dr Geoffry Seah

Family Physician

bottom of page