Dr Hugh Allen

Respiratory, Sleep and General Paediatrician

Dr Allen is a respiratory and sleep physician. He also does general paediatrics and allergy management. He offers services such as allergy testing and pulmonary lung function test.He works with the paediatric sleep study units at Sydney Adventist Hospital and Sydney Children's hospital,Randwick for performing paediatric sleep studies. Both these Sleep Centres now offer a full range of diagnostic and therapeutic intervention sleep studies for children.

Dr Hugh Allen graduated from the University of Sydney in 1979 and completed his fellowship in 1985 . He has been a fully qualified paediatric sleep physician since 1987 through the Royal Australasian College of Physicians. He has worked both in rural and outback NSW. He is currently a Visiting Medical officer at the Royal North Shore Hospital and has worked there for the last 25 years.



Dr James Thomas

General Paediatrician

Bsc(Med), MBBS, FRACP, GradDipClinEpi

Dr Thomas is a consultant general paediatrician, practicing in this role since 2005, having completed his training at the Children’s Hospital at Westmead. He has VMO positions at Royal North Shore Hospital and Sydney Children’s Hospital.

In his practice, Dr Thomas sees children from newborn to 18 years of age. While he sees a broad range of general paediatric issues, he has a special interest in developmental delays and disorders, behavioural difficulties, learning difficulties, attentional disorders / ADHD, problems with growth, weight gain and nutrition, toileting issues, and bowel/ bladder problems. He will work closely with parents, school staff, psychologists and other allied health professionals to achieve the best outcomes for the children he sees. Dr Thomas previously worked in private suites at Artarmon.



Dr Karin Timmers

General Paediatrician 


Dr Karin Timmers is a Consultant Paediatrician with abundant experience in acute and on-going general paediatric care. In addition, she has experience in Adolescent Health including management of eating disorders, weight management and complex adolescent care.

Karin gained her Medical Degree (MBBS/MSc) in the Netherlands and moved to Australia in 2005, where she completed her Paediatric training, including a Masters of Public Health at the University of Newcastle.

Karin worked in Tertiary Paediatric Centres such as Sydney Children’s Hospital in Randwick, The Children’s Hospital in Westmead, John Hunter Children’s Hospital and several regional and rural hospitals.

Karin provides General Paediatric and Adolescent Care including direction and support to children and families that are struggling with eating disorders and weight management.

As a mother of a boy and a girl in primary school, Karin is aware of the impact medical and mental health issues have on the individual and their family, and is passionate in providing support for families in need.

Karin is a Fellow of the Royal Australasian College of Physicians (RACP), a member of the Australian and New Zealand Association of Eating Disorders (ANZEAD), a member of the Australian Association of Adolescent Health (AAAH) and a member of the Neurodevelopmental and Behavioural Paediatric Society of Australasia (NBPSA).



Dr Kunal Thacker

Paediatric Gastroenterologist

Dr Thacker is a pediatric gastroenterologist and hepatologist commencing private consultation and endoscopy service for children.  He completed his training in gastroenterology and hepatology from the Children’s Hospital Westmead, followed by Sickkids Hospital (Toronto, Canada). After working in Perth at Princess Margaret Hospital for Children (now Perth Children’s Hospital) for 5 years, he has now moved to Sydney and  has recently joined the Children’s Hospital Westmead as a staff specialist. 

Dr Thacker will be providing consultations at our practice and will be performing endoscopy procedures at Westmead Private Hospital and Norwest Private Hospital. He will also be providing consultations from Bella Vista and Liverpool. To learn more about his practice, please visit his website or contact his secretary Jessica.

Phone : 1300742787

Fax for Referrals: 0290120030

Website: www.sydneypaediatricgastro.com.au

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