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Our Doctors

Sleep Testing Australia boasts a network of independent sleep scientists and sleep and respiratory physicians that provide sleep testing oversight, review and specialist consultation with our patients. This is an important distinction as the scientists and doctors are not employed by Sleep Testing Australia. This ensures independent governance of scientific analysis and medical review of sleep studies that form the service.

Our independent network of doctors are also available for consultation should your GP feel the requirement for specialist involvement in your sleep health.

Dr Andreas Fiene

North Brisbane

Dr Andreas Fiene is a thoracic, transplant and sleep physician. He is particularly interested in chronic respiratory illnesses (COPD, emphysema, asthma and bronchiectasis) and their influence on breathing related sleep disorders.

Andreas is a Staff Specialist at the Prince Charles Hospital in Brisbane and practices privately from his rooms in Clayfield and Northlakes.

Dr Andrew Pattison

Sunshine Coast

Dr Andrew Pattison is a Queensland born and trained Respiratory and Sleep Physician practicing on the Sunshine Coast. He has extensive experience and interest in the management of all general respiratory and sleep disorders.

Andrew holds a Staff Specialist position at the Sunshine Coast University Hospital and consults privately at the Sunshine Coast University Private Hospital and Buderim Private Hospital.

Dr Anna Ridgers

East Melbourne & Adelaide

Dr Anna Ridgers completed her Sleep & Respiratory training in Melbourne and specialises in sleep disorders including, sleep apnoea, complex apnoea, insomnia, parasomnias and circadian disorders.

Anna works with the Austin Hospital in Melbourne, including the renowned Institute of Breathing and Sleep, where sleep research is a main point of focus.

Dr Csaba Varga

Townsville & Toowoomba

Dr Csaba Varga is a respiratory and sleep physician and internal medicine specialist. He currently practices at Townsville Hospital in pulmonary and critical care.

Csaba has also practiced in Toowoomba and continues to practice privately via a telehealth sleep clinic, facilitated by us at Sleep Testing Australia.

Dr Cheng Siew

Redland Bay | East Brisbane

Dr Siew graduated from the University of Queensland in 2011 and subsequently underwent specialist respiratory and sleep medicine training at the Prince Charles Hospital, Cairns and Sunshine Coast University Hospitals. Dr Siew currently practices at Redlands Specialist Centre.

In addition to his respiratory and sleep training, Dr Siew was admitted to the Royal Australian College of Physicians in 2019 for general and acute care medicine.

Dr Darren Bowles

Gladstone & Surrounds

General physician, Dr Darren Bowles trained United Kingdom and has been the Clinical Director at Gladstone Hospital respiratory service.

Dr Bowles has advanced training in respiratory medicine and in sleep medicine and has particular interest in chronic lung disease, industrial lung diseases,  sleep apnoea and respiratory failure.

Dr Ged Dalgleish

Ballarat & Surrounds

Dr. Dalgleish is a Respiratory and Sleep Specialist, originally from Ararat. He completed his Bachelor of Medicine and Surgery at Monash University, before specialising in Respiratory and Sleep Medicine through both Monash Medical Centre and St Vincent’s Hospitals, in Melbourne.

Ged is also an associate lecturer with both Melbourne University and Notre Dame University in Ballarat, with a passion for medical education.

Dr Herman Lam

NSW Central Coast

Dr Herman Lam is a sleep and respiratory physician, completing his specialist training at Royal North Shore Hospital in Sydney. He has particular interest in obstructive sleep apnoea, chronic respiratory diseases and respiratory failure and is fluent in Cantonese.

Herman practices privately at Gosford and St Leonards in New South Wales.

Dr James Anderson

Sunshine Coast

Dr James Anderson has a special interest in pulmonary hypertension and pulmonary embolism and leads the pulmonary hypertension unit at SCUH .

James is a Staff Specialist at Sunshine Coast University Hospital (SCUH) and Senior Lecturer with Griffith University School of Medicine. He consults privately at the Sunshine Coast University Private Hospital (SCUPH) and Buderim Private Hospital.

Dr John Feenstra


Dr Feenstra sees general respiratory patients and has a special interest in Pulmonary Arterial Hypertension (PAH), Chronic Thromboembolic Pulmonary Hypertension (CTEPH), Obstructive Sleep Apnoea and non-invasive ventilation.

Dr Feenstra is head physician for PAH/CTEPH at The Prince Charles Hospital and a Senior Lecturer at the University of Queensland. He also practices privately at the Wesley Hospital.

Dr KK Kwong

South Brisbane & Mackay

Dr Kwong is a respiratory physician who completed his training in Hong Kong before immigrating to Australia in 2017. He has particular interest in chronic airway diseases (including asthma, COPD and bronchiectasis) as well as bronchoscopic and pleural procedures for lung cancer.

Dr Kwong established the South City Respiratory Centre in late July 2020 and speaks fluent English, Cantonese and Mandarin.

Dr Michael Holt

South Brisbane

Dr Michael Holt received his medical degree from The University of Queensland and completed his advanced training at The Prince Charles Hospital and Royal Brisbane and Women’s Hospital.

Michael commenced his sub-specialty training with the inaugural Mycobacterial Fellowship at Princess Alexandra Hospital and serves on the Program Committee of the Assembly for Pulmonary Infections and Tuberculosis for the American Thoracic Society.

Dr Rosemary Gan


Dr Rosemary Gan is a respiratory medicine specialist with a particular interest in sleep apnoea and complex sleep related breathing disorders.

Rosemary practices privately at the Nambour Selangor Private Hospital and operates the Selangor Respiratory Function Lab.

Dr Sameh Samuel

South Sydney & Wollongong

Dr Sameh Samuel is a Respiratory and Sleep Physician and is a Conjoint lecturer at the University of Newcastle. His main interests include asthma, COPD, lung cancer, sleep medicine and respiratory failure.

Sameh shares his time seeing patients in private practice at South Sydney and Corrimal.

Dr Keith Tong

Ipswich & Brassal

Dr Keith Tong is a General Dentist practicing in Ipswich. Keith also speaks Cantonese.

Dr Tong graduated from The University of Queensland with a Bachelor of Dental Science and has since practiced in both public and private dentistry. He has since earned post graduate qualifications in orthodontics and sleep dentistry. Keith operates an oral appliance therapy clinic out of his Ipswich and Brassal clinics.

Dr William Zoan

South Brisbane

William graduated from the University of Queensland Dental School and is passionate about all aspects of general dentistry. He has a special interest in sleep apnoea and operates an oral appliance therapy clinic in south Brisbane.

He is a member of the Australian Dental Association Queensland and the Australasian Sleep Association.