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Dr Aaron Tan

Dr Jeremy Tham

Dr Michael Tay

Dr Clara Chu

Dr Lena Thomas

Dr Michelle Lo

Dr Yau Yang Koh

Dr Young Hi Cho

Dr Joanne Ma

Dr Sumit Chadha

Dr Susan Beattie

Dr Dhakshini Nagarajah

Dr Erin Goldstiver

Dr Sarah Mulhare

Dr Ashok Doraiswamy

Dr Yea Chan

Dr Aaron Tan


Aaron Graduated from medicine at the University of New South Wales in 1997. In 1998 he commenced his internship and subsequent residency at Royal North Shore Hospital. In 2000 Aaron completed his Diploma in Obstetrics and Gynaecology and also commenced training with the Royal Australian College of General Practitioners. Subsequently, he attained his fellowship with the college in 2003.

In 2001 as part of his college training he spent 6 months as part of a “special skills” team, working in paediatrics at Royal North Shore Hospital and Westmead Children’s Hospital. Aaron sees this time in particular as being invaluable to his role as a GP looking after children in our local community.

Aaron has been in private practice since 2003 where he also acts as a GP supervisor with Wentwest- the local area GP training provider. He has been working in Bella Vista since 2004 and hopes that Norwest General Practice will continue to service the local community with the type of medical care that adheres to the highest standards as set by his level of training.

Aaron considers it a real privilege to be held in a position of trust that his patients have given him, in caring for their families.

In Aaron’s spare time he serves at his local community church, enjoys time with his beautiful family, and argues with his wife about how much sport he is allowed to watch on television.

Dr Jeremy Tham


Jeremy graduated from Sydney University in 1998 with Bachelor degrees in Medicine and Surgery. He worked at Hornsby Hospital and it was there were he gained his solid clinical foundation in General Medicine, ICU, General Surgery, Aged care and Orthopaedic surgery. After this, Jeremy went on to train in Emergency Medicine at A&E departments throughout Sydney, Rural NSW and the Children’s Hospitals.

Jeremy has special interests in Travel Medicine, Skin Cancers, Diabetes, Fertility Issues, Asthma, Women’s and Children’s Health. He developed several of these interests in his early years.

He worked in the community as a Paediatric registrar where he was involved with school aged medical assessments and development, childhood vaccination programs and running a nocturnal enuresis (bed-wetting) clinic. He also worked at the Children’s Hospital at Westmead in the General Medical departments and was involved in the management of newborns in the special care nursery. Jeremy’s experience in Women’s health was obtained at the Maternity Unit at Hornsby Hospital where he trained as an Obstetric Registrar, as part of the diploma of Obstetric and Gynaecology. His work there involved running an antenatal clinic, attending deliveries, managing early term miscarriages, working in the gynaecology clinic and performing surgical procedures in the operating theatre.

Jeremy went on to work as a registrar in Respiratory Medicine where he gained considerable experience in the management of asthma, chronic lung disease and lung cancer. Later, he worked as a clinical research fellow where he was investigating the use of inhaled insulin for diabetic patients. He also spent time on medical projects in indigenous Australian communities, Thailand and China.

With this broad clinical experience, Jeremy chose to specialise in General Practice and was awarded a fellowship with the  Royal Australian College of General Practitioners in 2005. Since then Jeremy has worked as a GP in the Hills district and later opened Norwest General Practice in Bella Vista with his colleague Dr Aaron Tan.

Jeremy has also been involved with the training of young doctors. In the past he has been an interviewer for the Sydney University Graduate Medical Program, an interviewer for the GP regional training provider Wentwest, and a clinical examiner for the Royal Australian College of General Practitioners. He continues to educate GP registrars in his role of GP supervisor at Wentwest.

Jeremy enjoys travelling and experiencing the amazing sights and cultures around the world. He enjoys photography and bush walking with his wife and children. He also is actively involved in the Chinese Christian Church at Milsons Point where he serves as a director on the church board.

Dr Michael Tay


Michael graduated from the University of NSW in 1999 with a Bachelor of Medicine/Surgery degree. He worked for several years at Hornsby Hospital where he gained experience in General Surgery, General Medicine, Emergency Medicine, Aged Care, ICU and Paediatrics before pursuing a career in General Practice.

Michael attained his fellowship with the Royal Australian College of General Practitioners in 2004. He worked in various practices at Woolgoolga, Carlingford, Strathfield and Baulkham Hills before settling at Norwest in 2007.

His professional interests including mental health, weight loss management, skin conditions and minor procedures.

Michael’s outside interests include listening to the Bible and Bible talks, meeting up with other Christians, spending time with his family, geocaching, collecting transformers and Star Wars figures, playing board games and making plastic and RC models.

Dr Clara Chu

BMed Sci (Hons), MBBS (Syd), FRACGP

Clara graduated from Medical Science with honours, before completing post graduate degrees in Medicine and Surgery from Sydney University.

Clara worked her intern and subsequent years at Gosford and Wyong Hospitals, where she gained experience in Emergency, General Medicine and Surgery, before working at the Children’s Hospital at Westmead where she completed a diploma in Children’s Health.

She completed her fellowship with the Royal Australian College of General Practitioners in 2007.

Clara has special interests in Paediatrics, Women’s Health, Skin Cancers, Occupational Health and Sexual Health. She has written an academic paper on the subject of Gene Mapping SLE in mice and has a certificate in Sexual Health and Family Planning.

Clara enjoys spending time with her husband and three daughters. She attends Norwest Anglican Church where she is involved in Playgroup. In her spare time she enjoys travelling, reading, going to the gym and swimming.

Dr Lena Thomas


Lena completed two undergraduate bachelor degrees in Arts and Science at the Australian National University before applying to do post graduate Medicine. Lena graduated from the Sydney University Graduate Medicine program in 2008 and subsequently worked her junior years at Royal Prince Alfred Hospital.

Lena has experience in Mental Health, Paediatrics and Emergency Medicine and has completed a certificate in Sexual Health and Family Planning.

Lena has special interest in Paediatrics, Skin Cancer, Occupational Health and Safety and Travel Medicine. She enjoy’s women’s health and is involved in GP shared antenatal care.

Lena worked as the Registrar Liaison Officer at Wentwest and has also been involved with the teaching and education of GP registrars. She was awarded the Fellowship with the Royal Australian College of General Practitioners in 2008 and has been working at Norwest General Practice ever since.

Outside of being a GP, Lena attends Christ Church St Ives, enjoys playing tennis and going to the beach.

Dr Michelle Lo


Michelle Graduated from the University of NSW in 1998 with  triple bachelor degree in Science, Medicine and Surgery. She spent her early years at Hornsby and Westmead Children’s Hospital where she worked in General Medicine and Paediatric Oncology, before deciding to specialise in General Practice.

Michelle completed her post graduate fellowship with the Royal Australian college of General Practitioners in 2003. Afterwards, she worked in Asquith and Hornsby until she joined Norwest General Practice in 2008.

Her special interests include Family Medicine and in particular Women’s and Children’s health.

Michelle has three beautiful children and enjoys needlework and painting.

Dr Yau Yang Koh


Yau graduated from the University of NSW in 2004 and completed his internship and residency years at St George and Hornsby Hospitals. During this time he gained experience in Psychiatry, Paediatrics, Obstetrics and Gynaecology, ICU, General Medicine, General and Orthopaedic Surgery and Emergency. Yau also spent a term as the senior medical resident in Griffith Base Hospital.

Yau went on to complete his General Practice training, gaining his fellowship with the Royal Australian College of General Practitioners. He worked in various practices including Hornsby, Penrith and Grafton before settling in Norwest General Practice. Yau’s special postings included a 6 month stint as a registrar in the palliative care service of Greenwich Hospital, and working in the Family Planning NSW Clinic in Ashfield where he obtained his certificate in Sexual and Reproductive Health.

Yau thoroughly enjoys all aspects of General Practice, particularly the opportunity of getting to know his patients over a period of time and being able to provide continuity of care. He has an interest in managing mental health issues, and is also experienced in Men’s, Women’s and Children’s Health.

Yau currently lives in the Hills district and is an active member of Castle Hill Baptist Church. In his spare time, Yau enjoys spending time with his wife and young daughters, going for walks, watching sports and eating. He is also making slow but gradual progress learning how to speak Cantonese from his wife.


Dr Young Hi Cho


Young Hi Graduated from the University of NSW in 2003 and completed her internship and residency at Westmead, Auburn, Blacktown, Mount Druitt and Orange Base Hospitals. She worked as a senior resident and registrar of the Royal Australian College of Obstetricians and Gynaecologists (RANZCOG) from 2006 to 2008, where she gained surgical and medical skills in women’s health and obstetrics. In 2009, Young Hi entered general practice broadening her field with further postgraduate studies in Child Health (DCH) in 2010 and a Certificate in Mental Health with the NSW Institute of Psychiatry in 2011.

Young Hi is able to do Mirena and Implanon insertions, and is keen to provide cosmetic medicine in the near future. She has served overseas in Cambodia, China and Kenya on short mission trips and is currently working in Ulladulla and Bella Vista. Young Hi enjoys swimming, travelling with her son and translating for her local Korean Church.

Dr Joanne Ma

BMed (Newcastle), FRACGP

Joanne graduated from the University of Newcastle in 2008 and worked at Gosford and Wyong Hospitals on the NSW Central Coast for several years. During this time she gained experience working in areas of Emergency Medicine, General Surgery, Urology, Neurology, Gastroenterology, Haematology, Rehabilitation Medicine, Obstetrics and Gynaecology and Paediatrics.

After deciding to specialise in General Practice she spent some time working in Toongabbie and the Blue Mountains before coming to work at Norwest General Practice at the beginning of 2012. Joanne became a fellow of the Royal Australian College of General Practitioners in 2013.

Joanne enjoys all areas of general practice but has a special interest in minor procedures such as implanon insertion, laceration repair and excision of skin lesions. She particularly likes the continuity of care with patients and their families which is made possible in the general practice setting.

Joanne currently serves as the National Recent Graduates staff worker for the CMDFA (Christian Medical and Dental Fellowship of Australia). In this role she cares for interns, residents, registrars and dental graduates across the country. She is also an active member of her local church. In the past her other jobs have included teaching piano and English, lifeguarding and working in a balloon shop.

Joanne’s current interests include playing board games, watching the cricket with her husband and playing team sports such as ultimate frisbee, touch football and gridiron. Joanne is also a fan of KFC, and was recently featured on a promotional bucket.

Dr Sumit Chadha


Sumit began his career as a Physiotherapist training at Sydney University. He gained extensive experience, working for nearly 5 years in various sports practices in Sydney, Brisbane and Canberra.

He has worked with a diverse group of patients from elite athletes to the weekend warriors. Sumit completed a Masters in Sports Physiotherapy and gained a Level 3 Accreditation, which is the highest Physiotherapy merit. He completed a research project at the AIS in Canberra analysing soccer injuries and his expertise is in Biomechanics and running, he also specialises in shoulders and knees.

Medicine was Sumit’s passion and attracted him. He trained at the Australian National University and whilst at University he won the GP award. Subsequently he worked as an intern at Royal North Shore Hospital where he gained essential experience in General Medicine, Surgery, Obstetrics and Gynaecology, Geriatrics, Paediatrics and of course General Practice.

Sumit plans to undertake further specialisation in joint injections.

In his spare time Sumit loves playing with his young daughters and losing tennis matches to his wife. He is also a keen soccer player.

Dr Susan Beattie

BSc(Med), MBBS(UNSW)Hons, FRACGP, DCH, Dip Occ Med

Susan graduated from the University of New South Wales in 2000 with first class honours in a triple bachelor degree in Medical Science, Medicine and Surgery. She subsequently worked for 2 years in a variety of hospital placements including John Hunter Hospital in Newcastle, Westmead Hospital and the Children’s Hospital. She then undertook GP training and worked in various parts of Western Sydney as well as the Blue Mountains and Bellingen. She was awarded the Fellowship of the Royal Australian College of General Practitioners in 2006, obtaining the highest overall mark in Australia for the Fellowship exam.

Shortly after, Susan and her husband moved to the United Kingdom where she worked in various roles throughout parts of London. This included work in a Christian medical charity where she was involved in looking after mission and aid workers around the world. She also worked in a highly regarded private practice in the world renowned centre of medical excellence, Harley Street.

Susan has also undertaken additional training in Children’s health, Women’s health, Sexual and Reproductive health, Occupational medicine and Travel medicine.

Since her first placement in a General Practice as a medical student, Susan has known she wanted to be a GP and feels that it is an immense privilege to be involved in people’s lives and to work with them towards better health outcomes. She is particularly passionate about patient education and has been involved in writing for several websites aimed at providing easily understood patient information.

While in London, Susan and her husband travelled frequently throughout Europe. Their favourite and most impacting trip being a 10 day tour through Israel and Palestine. They also travelled through Turkey, France, Spain, Germany, Austria, Italy and many other European countries and have been known to taste upwards of 100 different Gelato flavours in the course of a week in Italy.

While based in London, Susan gave birth to her 2 children and feels that the experience of becoming a mother and living abroad has served to make her a more empathic and well-rounded GP. Susan is a committed Christian and attends Christ Church St Ives. She also enjoys sunshine, hot weather, baking cakes and running.

Dr Dhakshini Nagarajah

MBBS (Monash Uni), FRACGP, DCH, B.Pharm (USyd)

Dhakshini started off her career as a pharmacist after graduating from University of Sydney.  She subsequently went on to do her postgraduate medical degree at Monash University in Melbourne.  She returned back to Sydney to do her internship and residency at Blacktown Hospital.  Here she gained invaluable experience working in areas of Gastroenterology, Emergency Medicine, Emergency Surgery, Palliative Care, Cardiology, Medical Assessment Unit, Neurology,  Rehabilitation Medicine, Obstetrics and Gynaecology, Respiratory and Paediatrics.

Her love for General Practice stemmed from her year placement as a medical student in a rural Victoria town, Maffra.  Here she learnt about holistic patient care, continuity of care within a small community and exposed to a large variety of medical conditions.  During her specialist training, she worked in Hazelbrook in the Blue Mountains, St Clair and here at Norwest General Practice, where she gained invaluable experiences and teaching under Dr Aaron Tan and Dr Jeremy Tham and completed her fellowship with Royal Australian College of General Practitioners.

Within general practice, Dhakshini loves paediatrics, women’s health, sexual health, mental health, travel medicine, skin checks and minor surgical procedures.  She has also completed her Diploma of Child Health with University of Sydney and Sydney Children’s Hospitals Network.  She just completed her Implanon insertion training and is continuing to develop her surgical skills with Monash University HealthCert courses.

In her spare time, she enjoys spending time with her husband, family and friends exploring Sydney, watching movies and eating out at the gastronomic delights of Sydney.  She also loves jet-setting and exploring new countries, foods and cultures.


Dr Erin Goldstiver

BSc (physiology), MBBS, FRACGP, DCH

Erin has recently joined the team at Norwest General Practice, having moved from sunny Brisbane. She is excited to meet the wonderful and varied patients of the practice.

She has a number of years experience as a General Practitioner, having completed her Medical Degree from the University of Queensland in 2003. Erin also has a Bachelor of Science in Physiology and a background in Child Health, having trained for some years in Paediatrics before seeing the light and becoming a GP. She also has a Diploma in Child Health from Westmead Hospital.

Erin has worked in Aboriginal Health in Alice Springs and has crossed the ditch and worked for a bit in New Zealand. She has volunteered on a medical outreach boat mission to remote Papua New Guinea and also helps out with Camp Quality.

Erin feels its important to try to get to know people, aiming to not just help manage a medical condition, but understanding the whole person and what makes them tick. She loves hearing people’s travel stories, having backpacked to many far flung places around the world and her special interests are Children’s and Women’s Health, Travel Medicine, as well as the fascinating variety of General Practice!

Erin is busy exploring Sydney with her partner Greg and loves a good bush walk, a lovely sunset and a yarn over good food and wine!

Erin is currently on leave.

Dr Sarah Mulhare


Sarah completed a Bachelor of Science at the University of Queensland and then went on to to complete a Bachelor of Medicine and Surgery at the University of Sydney. After graduating in 2011, Sarah worked for 2 years in a variety of hospital placements, both in rural Queensland and at Westmead Hospital in Sydney.

Sarah has gained invaluable experience working in General Medicine, General Surgery, Emergency Medicine, Palliative Care, Obstetrics and Gynaecology, and Geriatric Medicine.

Very early on in her career Sarah decided that she wanted to work in General practice and she feels very privileged to be in the position to care for peoples’ health. Sarah enjoys all aspects of general practice, but has particular interests in Women’s and Children’s Health. Sarah completed her Diploma of Children’s health in 2014 and plans on doing further studies in Women’s Health in the future.

Outside of work, Sarah enjoys spending time with her husband and son. She also loves baking and cake decorating for family and friends.

Sarah is currently on maternity leave.

Dr Ashok Doraiswamy


Ashok graduated from the University of Sydney with a Bachelor of Commerce in 2008 and a Bachelor of Medicine, Bachelor of Surgery in 2012.

Prior to commencing his specialty training with the Royal Australian College of General Practioners (RACGP), he worked as a junior doctor at Blacktown and Mount Druitt Hospitals.

Ashok attained his Fellowship with the RACGP in 2017, after undertaking training in the Blue Mountains, Bella Vista, Winston Hills and Auburn.

He enjoys all aspects of general practice, however he has a particular interest in paediatrics and has completed the Diploma of Child Health.

When he is not working, Ashok enjoys photography and playing the guitar.

Having grown up in the Hills District, Ashok is passionate about delivering outstanding health care and giving back to his local community as a family doctor.

Dr Yea Chan

M.B.,B.S (Sydney), DCH, FRACGP

Yea graduated from the University of Sydney with Bachelor of Medicine and Bachelor of Surgery (M.B.,B.S) in 2013. He subsequently worked at Westmead Hospital in a wide variety of areas including Emergency Medicine, Paediatrics, Geriatrics, Obstetrics and Gynaecology, Dermatology, Gastroenterology, and Orthopaedic surgery. These wide-ranging medical and surgical experiences have provided Yea with a strong foundation in General Practice.

Yea has completed his specialist training in General Practice and has been awarded the Fellowship of the Royal Australian College of General Practitioners. He has also completed further studies and trainings including Diploma in Child Health with the Sydney Children’s Hospitals Network and the National Certificate in Reproductive and Sexual Health with Family Planning Australia.

Outside of work, Yea enjoys spending time with family and friends, eating delicious food, staying active, and painting.