• Meet Our Endocrinologists

    Endocrinology is a branch of medicine dealing with the endocrine system, its diseases, and its specific secretions known as hormones.

    Dr Cecilia Chi

    MBBS (Hons1), FRACP

    Dr Chi completed her medical degree with an honours year at the University of New South Wales. She undertook physician training at Royal North Shore Hospital and Endocrinology Advanced training at Westmead Hospital. She has a strong interest in looking after patients with diabetes, and gestational diabetes.


    She has published papers discussing different aspects of diabetes management and medications.

    Dr Chi believes in a holistic approach to patient management and would be happy to see a variety of endocrine conditions including obesity, polycystic ovarian syndrome, thyroid disorders, osteoporosis, adrenal and pituitary disorders.

    Dr Chi is also interested in reproductive endocrinology and undertook training at the Westmead Fertility Centre.


    She would be keen to work together with patients and assist them in the workup of subfertility/infertility.


    CONSULTING DAYS: Wednesday

    Dr Jeremy Hoang


    Dr Jeremy Hoang is an endocrinologist and nuclear medicine specialist with appointments at the Hornsby Hospital, Sydney Adventist Hospital and Royal North Shore Hospital.


    He graduated from the University of Sydney in 1998 and completed training in endocrinology and nuclear medicine at Canberra Hospital, Prince of Wales Hospital and Westmead Hospital.


    He is a member of the North Shore LHD Diabetes Network Group and Complex Pregnancy Medical Consultation Working Group which meet regularly to promote development of diabetes services across the district. He is also part of the thyroid cancer multidisciplinary team based at Royal North Shore Hospital.


    He recently collaborated in the CALD Project, a North Shore district wide review of gestational diabetic patients from culturally and linguistically diverse backgrounds.


    He also has a strong clinical and research interest in the role of Nuclear Medicine imaging and therapy in the management of endocrine disorders.


    His private practice is based at Hornsby Medical Specialists and encompasses all aspects of diabetes and general endocrinology.


    He maintains an ongoing teaching role at the University of Sydney Northern and Sydney Adventist Hospital clinical schools.


    CONSULTING DAYS: Mondays, Wednesdays and Fridays

    Dr Lorraine Pereira

    MBBS, MMed(Clin Epi), Ms (Endocrinology and Diabetes), FRACP, BSc (nutrition)(Hons 1)

    Dr Lorraine Pereira is an approachable, compassionate and caring endocrinologist who is passionate about achieving the best outcome for her patients.


    She has a strong academic background and excellent communication skills.

    Lorraine obtained her medical degree from the University of Sydney. She then proceeded to complete a Masters of medicine (clinical epidemiology) from the University of Sydney and a Masters in Endocrinology and Diabetes from Barts University, London.


    She has trained extensively in endocrinology at Liverpool Hospital, St Vincent’s Hospital and Blacktown Hospital. In addition, she holds an advanced degree in nutritional sciences and has previously worked as a dietitian.


    Lorraine is committed to research, teaching and ongoing learning. She has undertaken research in metabolic bone disorders at the Garvan Institute of Medicine. She has published in peer-reviewed journals and presented at local and international conferences. She has also actively participated in the education and training of medical students and the preparation of doctors for their specialisation exams.


    Lorraine covers general endocrinology including thyroid, diabetes, pituitary and adrenal disorders. She has a special interest in metabolic bone disorders, gestational diabetes and obesity.




    Dr Alice Tang

    BSc(Med), MBBS, FRACP, PhD

    Dr Alice Tang completed medical school at the University of New South Wales after which she did general medicine training in various hospitals across Sydney and country NSW.


    She progressed to endocrinology advanced training at St George Hospital, Nepean Hospital and the Garvan Institute of Medical Research / St Vincent’s Hospital, after which she was awarded her Fellowship of the Royal Australasian College of Physicians (FRACP). She then went on to do a PhD specialising in obesity and metabolic health at the Garvan Institute. She has taught medical students and doctors-in-training, published in peer-reviewed journals and presented in national and international conferences.


    She is a member of the Endocrine Society of Australia, Australian Diabetes Society and the US Endocrine Society. She is also committed to continuing professional education.


    In addition to seeing patients at her Hornsby private practice, she has a Visiting Medical Officer appointment at St Vincent’s Hospital, Darlinghurst. Alice accepts referrals for general endocrinology, including diabetes.


    Alice is caring, detailed in her assessments and strives to provide quality care for all her patients.


    CONSULTING DAYS: Fridays and Saturdays

    Dr Elisa Tyson

    MBBS(Hons1)(NSW), BSc(Med), PhD, FRACP

    Dr Tyson graduated in Medicine with First Class Honours from the University of New South Wales. She completed her postgraduate training in Endocrinology at Concord Hospital, Sydney and the John Hunter Hospital, Newcastle. Dr Tyson finished her PhD in 2009 at the University of Newcastle, focusing on endocrine signalling in the uterus during pregnancy.


    Dr Tyson works full time in private practice in Newcastle and Hornsby, Sydney. She consults in all aspects of adult endocrinology, including diabetes, thyroid and pituitary, with an interest in osteoporosis.

    Dr Tyson is a member of the Royal Australian College of Physicians, Endocrine Society of Australia and the Endocrine Society (USA).


    CONSULTING DAYS: Thursdays and alternating Fridays

  • Meet Our Paediatricians

    Paediatrics is the branch of medicine that involves the medical care of infants, children and adolescents.

    Dr Yew Wee Chua

    M.B.B.S.(Hons)(SYD), F.R.A.C.P., MPubHealth, DCH

    Dr Yew Wee Chua is a Consultant Paediatrician and Fellow of the Royal Australasian College of Physicians since 2005.


    He trained with the Children’s Hospital at Westmead after graduating with Honours from the University of Sydney. He completed a Masters of Public Health with Distinction through the University of Newcastle in 2010.

    Yew Wee is a Consultant Pediatrician with admitting rights at both the Children’s Hospital at Westmead and Hornsby Ku-Ring-Gai Hospital.


    Yew Wee is a compassionate and caring pediatrician who is committed to the health and well being of children of all ages. He enjoys partnering with parents and families to holistically care for their children.


    Yew Wee is a committed Christian and an active member of his church family. He is happily married and is the father of two children who give him much joy.


    CONSULTING DAYS: Monday, Tuesday and Wednesday

    Dr Gaya Raman

    MBBS, BMed Sci, FRACP Paediatrics and Child Health, FRACP Paediatric Nephrology

    Dr Gaya Raman is a General Paediatrician and Paediatric Nephrologist (specialising in disorders of the kidney and urinary tract).


    She graduated from the University of Melbourne and completed her paediatric training at John Hunter Hospital, Sydney Children's Hospital and Westmead Children's Hospital. She has been involved in research at both Sydney Children's Hospital and the Centre for Kidney Research in Westmead. She is currently completing a Masters of Clinical Epidemiology through the University of Sydney.


    Dr Raman specialises in children of all ages and is passionate about helping patients and families through difficult times. She feels strongly about providing culturally sensitive care to patients of all backgrounds. Dr Raman provides care for both common paediatric problems as well as complex and chronic paediatric conditions. She has extensive experience with children who have kidney and bladder problems including urinary tract infections, follow up of antenatal ultrasound abnormalities and bedwetting.


    Gaya speaks both Malay and English. She and her husband are proud parents to 2 young children who keep them on their toes.



    Dr Joshua Steadson


    Dr Josh Steadson is a general paediatrician with a special interest in feeding difficulties, bed wetting and neonatal medicine. He also enjoys seeing the wide variety of general paediatric problems including behavioural and attention difficulties along with other chronic medical problems.


    Josh studied medicine at the University of Sydney where he graduated with both honours and a wife - a fellow medical student who is now a successful GP and mother to their two lovely children. He completed his early medical training at Hornsby, Mona Vale and Manly hospitals and his specialist paediatric training at The Children's Hospital at Westmead, Royal North Shore Hospital and Hornsby-Kuringai Hospital and community health service.

    He has private rooms in Hornsby and works as a VMO at Hornsby Hospital. Josh enjoys medical education, having taught medical students for the University of Sydney for several years and running regular simulation courses in paediatric medial emergencies for junior doctors and nurses.


    If he had more spare time he would spend it in the bush - with his family if they’d join him!


    CONSULTING DAYS: Wednesday

    Dr Des Cohen


    Dr Des Cohen is an experienced general paediatrician who holds dual South African and Australian Paediatric Fellowships. He has been practicing in Hornsby, Wahroonga and North West Sydney for the last 23 years.

    Until recently Dr Cohen was a Visiting Medical Officer at Sydney Adventist Hospital and Norwest Private Hospital. He continues to teach medical students at the Sydney University Northern Clinical School based at the Sydney Adventist Hospital.

    Dr Cohen sees children of all ages and has a special interest in seeing newborns, children with neurodevelopmental problems such as ADHD and Autistic Spectrum Disorder and also children with allergic conditions such as food allergy, eczema and asthma. Allergy skin prick testing and lung function testing for asthmatics are carried out at the Hornsby Medical Specialist rooms.


    Consulting Days: Tuesday and Thursday

    Dr Carolyn Cooper


    Dr Carolyn Cooper is a paediatrician sub-specialising in Developmental and Behavioural Paediatrics. Carolyn graduated from The University of Sydney in 1988 and trained in Paediatrics with The Royal Alexandra Hospital for Children, Camperdown. Over the past 25 years, Carolyn has developed an interest in the diagnosis and management of children with Attention Deficit Hyperactivity Disorder (ADHD), Autism Spectrum Disorder (ASD), Developmental Delay, and early childhood behavioural problems through working in metropolitan hospitals, community health clinics and private consulting rooms. Carolyn is a Fellow of the Royal Australasian College of Physicians and as well holds a Masters of Public Health and Masters of Health Administration. Carolyn maintains her professional development through membership of the Neurodevelopmental and Behavioural Paediatric Society of Australasia and regularly attends international meetings relevant to ADHD and ASD. Carolyn is also mother to three delightful teenage daughters.


    CONSULTING DAYS: Friday (fortnightly)

  • Infectious Diseases and Microbiology

    An infectious disease doctor specialises in the various infections that can affect the human body.

    Dr Wei-Yuen Su


    Infectious Diseases Physician and Microbiologist who has appointments with Sydney Adventist and Hornsby Ku-ring-gai Hospitals.

    If you are referred to Dr Su for consultation, please send your referral to info@hmeds.com.au.


    Your information will be reviewed by Dr Su and you will be contacted by a member of our staff to arrange an appointment at our rooms at 39 Palmerston Road when available.

  • Referring Doctors

    Thank you for your referral.

    Your patients are our priority.

    As part of Hornsby Medical Specialists' commitment to deliver superior patient care, our clinic has been designed around your patients' needs.
    One of our friendly and caring secretaries will assist your patient as soon as they arrive. There is disability access via a removable ramp.
    Should you wish to speak to any of our Doctors regarding a new or existing patient, please do not hesitate to call our reception staff, who will do their best to connect you.
    Our doctors are committed to communication, and will ensure you are informed of the outcome of the consultation by letter, in tandem with any additional interested parties. This will continue throughout the course of the patient's care.
  • Frequently Asked Questions

    If your question isn't answered below, please submit it in 'Contact Us' and we will provide an answer promptly.

    Do I need a referral to see a Doctor?

    Yes. All specialist consultations require a valid referral (addressed to the specialist you are booked with).

    All new patients will need to provide a referral at their initial consultation. Returning patients will need to renew their referral after:

    - 12 months if it is from a GP, and

    - 3 months if it is from another specialist

    We will provide you with timely reminders when a new referral is due.

    What will I need to bring to my appointment?

    In addition to your referral and medicare card, please do your best to bring copies of any relevant scans, tests or procedure reports. The more information/history you can present to your specialist, the more thorough an investigation they can conduct.

    Do you claim for Medicare or Private Health Funds?

    Yes. Provided you bring your medicare card to the appointment, we process Medicare claims on the spot. The rebate, if successful, is transferred back into your nominated bank account within a day or two. Your medicare card is only necessary for your initial consultation.


    If your child is seeing a Pediatrician, they will need a parent's medicare details and date of birth for the claim to be allocated to.


    Please note, private health insurance cannot be claimed for any consultation.

    What are the fees involved?

    Specialist fees vary according to the type, length, and complexity of the consultation. If you would like an estimate for your appointment, please call our reception staff. As a private clinic, there is an upfront fee for each consultation (unless you are a hospital referred gestational diabetes patient).

    What happens if I lose my pathology or imaging request form?

    When you finish your consultation and present at the reception desk, we ask that you please produce all request forms that the doctor has given you so that we can scan copies onto your file. This way, we will be able to create another copy for you in the event that you lose the original. Should this happen, simply call our friendly receptionists and they will assist you.

  • Useful Links

    Click on the logos below to visit their website.

    Tresillian Family Care Centres: Baby Advice & Parenting Tips

    Tresillian Family Care Centres: Baby Advice & Parenting Tips

    Early Childhood Australia:

    A Voice For Young People