Meet Our DoctorsDoctor team






Are you looking for a doctor with a wealth of experience, who you can trust to look after your primary healthcare needs in a professional and caring manner? Our team of highly qualified and experienced doctors come from a wide variety of backgrounds. Their range of interest areas are diverse and all doctors collaborate on a regular basis to share knowledge with each other.

To help you find a doctor that's right for you, please read their profiles below.

Dr Mark Chen Dr Mark Chen


Mark graduated from the University of Otago in 2012 after completing his clinical training in Christchurch Hospital during the time of the earthquake. After graduating, he worked as a junior doctor at Waitakere Hospital, North Shore Hospital, Greenlane Hospital and the Mason Clinic. Since pursuing a career in General Practice, Mark has worked in rural NZ and South Auckland.

During his time at Waitakere Hospital, Dr Chen thoroughly enjoyed working with the people of West Auckland and it is for this reason that he has decided to settle here. Mark enjoys interacting with people and is looking forward to developing positive, long-term relationships with his patients. He will be working full time and staying long term.

Dr Chen was born in Taiwan and lived there until the age of 10. On moving to New Zealand, he lived in Hamilton and finished the rest of his schooling there. He is fluent in both English and Mandarin.

Outside of work, Mark loves to surf, go to the gym, find good food places and spend time with friends and family.

Dr Milan RadojevicDr Milan Radojevic


Milan obtained his medical degree from the Australian National University in 2010. Prior to studying medicine, he also obtained a biomedical science degree from the University of Auckland.

Milan has spent the last five years gaining experience in a wide range of specialties in the Auckland hospital system. His particular interests include internal medicine and the care of the elderly.

Dr Radojevic moved to New Zealand in 1995 from Serbia. He is fluent in English, Bosnian, Croatian and Serbian. He grew up in West Auckland and lived here until he moved to Australia to study medicine. Milan is excited to return to West Auckland and is looking forward to a long-term career in General Practice here.

When not working, Milan enjoys spending time with his friends and family. He also enjoys staying fit and tries to exercise most days of the week.

Dr Tom MarksDr Tom Marks

BM, BSc (Hons), PG Dip. SportsMed, Dip. Dermoscopy (SCCA)

Dr Marks studied at the University of Southampton in the UK, graduating in 2008. After working for two years in a nearby hospital, he moved to Tauranga where he worked in general surgery, then Hamilton where he worked in orthopaedic surgery before returning to the Bay of Plenty to commence GP training.

Tom is passionate about raising health awareness and practices this himself with regular exercise. His particular interests are skin cancer detection and surgery, orthopaedics/sports medicine/fractures, minor surgery and men’s health.

Dr Sylvia Patricia "Trixie" YamDr Trixie Yam


Trixie graduated at De LaSalle Health Sciences Institute, Philippines in 1991. Prior to this she studied four years at University of Santo Tomas where she gained her Bachelor in Science, Major in Psychology.  She attained ten years of clinical practice as an Internal Medicine specialist in The New Medical City and St. Luke’s Medical Centre, two prestigious hospitals in the Philippines. Prior migrating to New Zealand in 2009, she was Head of Medical Division of Fortune Care, a major health insurance company.

After passing her New Zealand competency exams, Dr Yam worked as junior doctor in a variety of hospitals – North Shore, Waitakere and Starship. During her tenure, she embraced diversity in the workplace and honed her medical knowledge working with numerous cases.  Her specific interests include Internal Medicine, Women’s health and Paediatrics.

Trixie is fluent in English and Tagalog. Outside the clinic, she loves designing and creating jewellery, reading a novel and spending time with her family.

Dr Claire ChuDr Claire Chu


"I believe good medicine looks at treating an illness as well as the effects of the illness in a person as a whole."

Claire graduated from Otago University in 2004 and has since worked in all four hospitals in the Auckland region, with various experience in different specialties including Starship Paediatrics, Obstetrics and Gynaecology, General/Respiratory/Renal medicine, Surgery and Geriatric medicine. In 2007, her enthusiasm in children's health prompted her to comple a Diploma in Paediatrics and she is now a Fellow of the Royal New Zealand College of General Practice with updated knowledge and skills to provide a high quality of care.

Claire emigrated with her family from Taiwan and has been resident in NZ since 1996. She is fluent in both English and Mandarin. She enjoys working alongside her patients to improve their health. She cares for people in all age groups and with all cultural backgrounds. Her special interests are childrens health, womens health, contraception/fertility issues, family medicine, chronic care management and minor surgery.

Claire lives in central Auckland with her doctor husband Daniel. In her private time she enjoys jazz/hip hop/cultural dancing, outdoor sports, music and shopping.

Dr Manuel FontanillaDr Manuel Fontanilla


Manuel is a Fellow of the Royal New Zealand College of General Practitioners and the New Zealand Association of Musculoskeletal Medicine. He has a special interest and expertise in treating pain, deformities and disabilities resulting from infections, rheumatism, accidents, sports injuries and cancer of the bones, joints, muscles and other soft tissues of the body.

Manuel has more than twenty eight years of medical and orthopaedic surgical experience. He has taught and worked in University Hospitals in Sweden, New Zealand, Sultanate of Oman and the Philippines. These years in clinical practice, teaching and research has proven invaluable in potential problem analyses and evidence based decision making in the day to day care of his patients.

Manuel is particularly good at the closed treatment of fractures and dislocations, joint manipulations, aspirations and injections. He is able to do minor surgeries to remove skin cancers and lumps and bumps. He plans to have dedicated Pain Clinics to help sufferers of neck, back and limb pains and will also conduct school screening for early detection of scoliosis and other spine deformities.

Career highlights: At the Royal Hospital in Oman, he teamed with paediatric surgeons in the successful separation of a pair of Siamese twins conjoined at the pelvis. He also performed complex corrective surgery for spinal deformities. In Sweden, he participated in the total removal of a patient’s sacrum due to cancer. In Christchurch Hospital, he did postgraduate studies in musculoskeletal medicine while working as a surgical registrar. He was later conferred the diploma from the University of Otago.

Dr Gisa GeorgeDr Gisa George

MBBS, MRCGP (UK, with distinction), DCH, FRNZCGP

Dr George completed her undergraduate medical training at Calicut University, India in 2001. She was the best outgoing student in her medical school, securing gold medals for the highest achieving student in Medicine and Surgery. After completing her residency, Gisa emigrated to the UK. Here she gained entry into the Carmarthenshire Vocational Training Scheme in Wales, and  acquired experience in Emergency Medicine, Paediatrics, Care of the Elderly and Psychiatry. She  completed her General Practice training in 2007 and passed the membership examination of the Royal College of General Practitioners (United Kingdom) with distinction.

Gisa has been working as a General Practitioner in Liverpool since 2008. During this time she has cared for patients in all age groups and belonging to many different cultural backgrounds. She has also looked after patients with complex medical needs. Dr George received training in Palliative Medicine through Aintree University Hospital and has looked after patients affected by terminal illnesses. She has also completed training in minor surgery and joint injections.

Gisa has a Diploma in Child Health, as well as a special interest in chronic disease management, especially diabetes. She has also been a tutor for medical students at Liverpool University and has a passion for teaching.

Since 2013, Gisa had been working at Holycross Hospital in India, where she gained further experience in emergency medicine and management of tropical illnesses. She emigrated to New Zealand in January 2015 to join her husband, who is a consultant at Auckland City Hospital. They have now settled in Epsom with their two sons.

During her free time, Gisa enjoys dancing, music, cooking, walking, spending time with her family outdoors and shopping.

Dr Colin KatzenDr Colin Katzen


Colin is a South African trained doctor that has been working in General Practice for the last 15 years. He was an AFS intercultural exchange student to the Unites States in 1983 and 1984. In addition, Dr Katzen was a keen athlete and was a South African Schools Champion in 800m and 1500m.

Colin has worked as a GP in South Africa, Australia, Ireland and Masterton during the last 15 years. He also worked as a remote site Medical officer for International SOS prior to relocating to NZ with his family. Dr Katzen’s interests are sports medicine, community development and diabetes care.

Colin was the team doctor for the Eagles Rugby Franchise in South Africa for six seasons. In his spare time, he enjoys spending time with family, watching sports and getting involved in outdoor activities.

Dr Bill MackeyDr Bill Mackey

MBChB, DipObst, Dip Cosmetic Medicine, FACAM

We are delighted to announce that Dr Bill Mackey has returned to General Practice at Henderson Medical Centre! While he may need no introduction to some of you, Dr Mackey has spent much of his medical career running his own busy General Practice in the heart of Henderson.

Over the last few years, Bill owned and operated a medical supply company, and also gained further qualifications in appearance medicine. He is a Fellow of the Australasian College of Aesthetic Medicine and regularly performs Botox injections and other cosmetic procedures on-site.

Dr Mackey has returned to General Practice to help with the current nationwide GP shortage. This ensures that we have plenty of doctors available to accommodate all of our patient needs. He brings a wealth of knowledge and experience to Henderson Medical Centre and acts as a mentor for our younger doctors.

Bill is enjoying being back and plans to stay with us for the forseeable future, offering both general practice and appearance medicine consultations and procedures. If you would like further information about the range of appearance medicine procedures available, please click here or make a free initial consultation with Dr Mackey through reception.

Dr Rodney MarksDr Rodney Marks

B.Sc (Hons), MBChB, DCH, FRNZCGP, Certificate in Advanced Dermoscopy and Histopathology (University of Queensland), Certificate in Dermoscopy (SCCA), Certificate in Skin Cancer Medicine (SCCA)

Dr Rodney Marks has been working in West Auckland as a General Practitioner since he came to New Zealand in 1994. Before that he was in private practice in South Africa for over 10 years. After qualifying there in 1981 he gained a Diploma in Child Health.

Rodney has a special interest in the  treatment of suspicious skin growths and he attends international courses on this subject. He uses Dermatoscopic assessment of individual skin growths or full body skin checks. Rodney will discuss your Dermatoscopic findings and the recommended treatment. Any  surgery that may be  required will be explained with the aid of diagrams and photographic images. Private medical insurance could be used to obtain a refund for the surgical procedures. Non-surgical treatment of benign or pre-cancerous skin growths can be carried out either by diathermy or cryotherapy.

Rodney also treats problematic snoring using the Snore-Op procedure. An  appointment can be made with Rodney to discuss snoring and the benefit of Snore-Op. Click here for further information.

Being a fitness enthusiast Rodney believes in regular exercise as a means of preventing health risk factors and slowing ageing.

Sir David MaugerSir David Mauger


David retired from Starship Childrens Hospital in 2006 after a 40 year career in Paediatrics. He was the first Paediatrician to specialise in child cancer in NZ and set up the first specialist oncology unit. He was also involved with the first bone marrow transplant done in NZ. David was a member of the group that set up the Child Cancer Foundation and an advocate for the establishment of Starship Childrens Hospital. In 2002, David was knighted for these services.

Since leaving Starship Hospital, Sir David has become a trainee in Urgent Care, a branch of medicine closely related to General Practice. He has five sons who all make movies and seven grandchildren who all live in Auckland. His other interests include classic yachts and Ceroc dance.

Dr Dirk VenterDr Dirk Venter

FRNZCGP, FSCCA, MBBCh, DA(SA), Dip. Skin Cancer Med/Surg (SCCA), Dip. Dermoscopy (SCCA)

Dirk has been practicing in West Auckland since 1998 and is a Fellow of the Royal NZ College of General Practitioners. He aims to provide friendly and up-to-date personal healthcare to individuals and families. Dirk enjoys all aspects of General Practice, seeing patients of all ages.

Dr Venter has an interest in the diagnosis and management of skin cancer, and underwent further training in this area through the University of Queensland. He is also Skin Cancer College Accredited. This means that Dirk has successfully completed high level training with the Skin Cancer College Australasia and has proven skills and knowledge in the diagnosis and management of skin cancer. He has the latest dermoscopic equipment and uses this to help diagnose suspicious moles. Dr Venter regularly removes skin cancers (including complex, large lesions on the face) in one of our on-site surgical theatres. Visit for further information.

Dirk is very experienced in the no-needle, no-scalpel method of vasectomy (also done on-site). Visit for further information.

Dr Venter is an Affiliated Provider to Southern Cross Health Society for vasectomies and skin cancer surgery.

He lives locally in West Auckland with his wife Becky, where family life is important to them both.

Dr Kwan LowDr Kwan Low - currently on sabbatical. Back in Feb 2017

FRNZCGP, PGDipObstMedGyn (University of Auckland), PGCertWHlth (University of Otago), MBChB (University of Auckland)

Kwan is originally from Malaysia. He graduated from the University of Auckland in 2007 and spent a few years working in major hospitals around NZ, gaining further experience in Obstetrics & Gynaecology, Rheumatology, Emergency Medicine, Orthopaedics, General Surgery and General Medicine. He obtained a Certificate in Women’s Health from the University of Otago in 2010 and an Advanced Diploma in Obstetrics & Gynaecology through the University of Auckland in 2011. Dr Low is a Fellow of the Royal NZ College of GP’s.

Kwan enjoys seeing wide range of people in the community. He has a special interest in Women’s Health and has three years’ experience in Women’s Health in hospitals.

Dr Low is able to perform minor surgeries such as Jadelle insertion and removal, Mirena insertion and removal, ingrown toenail removal, skin excisions & biopsies and steroid joint injections.

Dr David RoweDr David Rowe


Dr Rowe recently reached the age where he qualifies for a SuperGold Card! As such, he has made the decision to spend some well-deserved time with his wife and family, to enjoy some travel and soaking up all that Auckland has to offer.

David will still be practicing at Henderson medical Centre, covering for our other doctors when they take extended leave or are sick. However, from 24 August 2015 he will no longer be working regular hours.


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