Our Doctors at Walker Street

Both Dr Sharron Phillipson and Dr Lesleigh Brown are the owners of the North Sydney Medical Practice and North Sydney Skin Cancer and Cosmetic Medicine Centre located at 71 Walker Street on the Ground Floor and Level 5.


Dr Vincent Lertamornthep

MBBS(Syd), DTM&H, GradDipPaed, FRACGP
Dr Lertamornthep graduated from the University of Sydney in 1995. He is a Fellow of the Royal Australian College of General Practitioners and holds a Graduate Diploma in Paediatrics. Vincent's Diploma in Tropical Medicine and Health enables him to provide extensive travel advice for our patients. He is fluent in Thai.

Dr Ngaire Millener

BSc, MBChB
Dr Millener graduated from the University of Auckland in 1984. Her special interests include Women's Health and Travel Medicine.

Dr Michael Johnston

MB.BS. (USyd)
Dr Johnston graduated from the University of Sydney in 1984 and spent nearly 20 years as a GP in Westmead, Sydney. Michael was a partner in a medical education company before returning to full time general practice. He is interested in all aspects of general practice including men's health, skin and chronic diseases such as diabetes and heart disease.

Dr Richard Loizou

MBBS(Hons)
Dr Loizou graduated from Sydney University in 2006 and since that time has provided medical services to the Australian Defence Force. Dr Loizou is a qualified Diving Medical Examiner and works closely with the Royal Australian Navy's school of diving medicine. His special interests include adolescent health and sports medicine.

Dr Joshua Wall

MBBS (Distinction), BPSYC (Hons)
Dr Wall graduated with distinction from the University of Wollongong in 2014, winning prizes in General Practice, Psychiatry, Women’s Health and Paediatrics. Prior to entering medical school Dr Wall completed a Bachelor of Psychology, where he worked as a drug and alcohol counselor. Dr Wall also helped set-up and coordinate a 14 bed homeless refuge in his home town Wollongong called Paddy’s Place. Prior to acadaemia Dr Wall was an elite athlete in the NSW institute of sports cycling program. It was here that he developed an interest in sports medicine. Dr Wall takes a holistic approach to patient care, with other interests including dermatology, minor surgical procedures, mental health and men’s health. Outside of the practice, Dr Wall enjoys time with his wife and son, and keeps active by training Crossfit and mixed martial arts.

Dr Nazir Sumar

Dr Sumar graduated from University in Shiraz, Iran. His special interest includes men’s health. He can speak several languages including Persian, Swahili (East Africa), Arabic and Hindi.

Dr Simonne Shepperd

Dr Simonne Shepperd graduated from the University of New South Wales in 2000. She has worked at hospitals in Australia and the UK. She completed her Fellowship exams through the Royal Australian College of General Practitioners. Dr Shepperd has extensive experience with the use of cosmetic injectables, sclerotherapy, peels and laser applications having worked for 6 years at the prestigious Courthouse Clinic in London. She also has a Certificate in Reproductive and Sexual Health.

Dr Amanda Pieris

Dr. Amanda Pieris is a highly experienced general practitioner who enjoys caring for patients of all ages and stages of life. She graduated from UNSW and has worked in general practice since 1984. Dr Pieris worked at Beecroft for an extensive period before relocating overseas from 2009 until 2016.

She joined North Sydney Medical Practice in 2018, having moved locally. While overseas Dr. Pieris completed a masters degree in clinical education from Flinders University and did volunteer medical work in several countries.

She enjoys all areas of general practice and family medicine, and has special interest in women’s health, lifestyle and travel medicine. She loves spending time with her family, especially her four gorgeous grand-daughters.

Dr Katya Danko

Graduated 1988 from Moscow Medical Academy ( named after I.M. Sechenov)
Interests: Woman/Children Health & General Medicine
Diploma in: (1) Child Health (2) Environmental Health (3) Ophthalmology (4) Primary Care Dermatology

Dr Catherine Choi

BA/LLB (Hons), MBBS (USyd), DCH
Dr Catherine Choi graduated from the University of Sydney and has worked in hospitals across NSW. She completed her Fellowship exams through the Royal Australian College of General Practitioners. She is passionate about all aspects of general practice, including a particular interest in women's health and mental health. She also has a Diploma of Child Health and is currently completing a Certificate in Reproductive and Sexual Health.