Affiliated Doctors

Dr Matty Moore

Dr Matty Moore grew up in Austin, Texas. He started his medical career in the US, working as a rural GP and then opening his own practice. Matty and his family moved to Queensland in 2010 where he worked in an Emergency Department. Matty and his family then moved to WA where he’s now the SMO (Senior Medical Officer) in Busselton Emergency Department and a GP at Dunsborough Medical Centre.

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His interest in medicinal cannabis stems from the movement and acceptance of it’s properties in the United States and around the world. He was looking for alternative treatments for several conditions whose management became quite stagnant and frustrating.

After Government legislation in 2016 which allowed GP’s to prescribe cannabis, Matty began to educate himself on the history of cannabis, the cannabis plant, and the endocannabinoid system.

When he’s not caring for patients you can find Matty riding his mountain bike or spending time with his family in a serene outdoor environment.


Dr Shamistra Barathan

Dr. Shamistra Barathan graduated from Imperial College School of Medicine in London in 2000 and worked in the United Kingdom and New Zealand before settling here in Melbourne. She has over 20 years of experience in practising medicine and has specialised in nutritional and environmental by completing a degree with the Australasian College of Nutritional and Environmental Medicine (ACNEM).

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Dr. Shami is passionate about the holistic approach to healthcare. She has seen patients transform their health beliefs by managing their stress levels, eating a whole food diet, managing nutrient deficiencies, supporting their gut health, exercising more, and addressing their inner needs in life. This results in long-term, sustainable results.

She soon realised that this requires a team approach. So, she found like-minded practitioners to join Usawa and has never looked back. She works with a dietitian, counsellor and hypnotherapist, yoga therapist, and mindset coach. The practitioners work together to help the patient achieve their health goals.

Dr. Shami practises what she preaches! She meditates daily, plays the piano, practises yoga, is a mountaineer, a traveller, and is involved in charity work in her spare time.

Areas of interest: Gut Symptoms e.g. bloating, constipation, IBS, Mental health e.g. Anxiety and Depression, Weight gain, Female Hormones e.g. Endometriosis and PCOS, Thyroid disorders.

Dr Shamistra Barathan is currently the Vice President of ACNEM.


Dr James Connell (MBBS, FRACGP) aka Dr Jim is an Australian RACGP accredited General Practitioner and currently the President of the Society of Cannabis Clinicians. He is passionate about people and individualised medical care. He is sociable and enjoys getting to know his patients; taking the time to hear their stories. 

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While growing up on a farm on the Murray River in NSW, he discovered a love of being outdoors and playing sport. Dr Jim is married and has a happy and energetic two-year-old daughter.

When he is not with his patients or working on his latest ‘big idea’ he will be foraging in nature with his family. Dr Jim and his wife named their medical practice Forage Medicine & Lifestyleafter after watching their daughter collect items while exploring nature to make ‘medicines’ for her teddies.

Dr Connell is committed to finding the most suited treatments to provide relief for his patients so they can live the life they most enjoy. His patients often comment on his exceptional bedside manner, his kindness, and the way he always greets you with a smile.

Dr Jennifer Rothfield

Dr Jennifer Rothfield is a General Practitioner at NEXT Practice in Prahran.  With a passion for helping patients achieve better health outcomes by treating patients as a whole person, Dr Rothfield practices preventative and conventional medicine.

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In particular, Dr Rothfield incorporates the use of cannabis based medicines into her therapeutic practice for indications such as chronic pain, insomnia, anxiety, PTSD, cancer pain and inflammatory disorders. 

Dr Rothfield has over 35 years of medical experience with a heavy focus on chronic pain and mood disorders.

Her areas of special interests include preventative health, women’s health, travel medicine, sports medicine, fertility medicine and mental health.

Dr Tamara Nation

Tamara graduated from the University of Melbourne medical school in 2002. She then spent a number of years working at St Vincent’s hospital and the Royal Children’s hospital, Melbourne. She completed a PhD at the Murdoch Children’s Research Institute in 2011, further developing her special interest in paediatrics.

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Tamara then went on to undertake general practice training and became a fellow of the Royal Australian College of General Practitioners.

She is experienced in women’s health and has a certificate in Sexual and Reproductive Health with Family Planning Victoria. She is also an antenatal shared-care provider with the Mercy Hospital for Women and a member of the Australian Menopause Society. She is also an examiner for the Royal College of General Practitioners.

Tamara believes that good health lays the foundation to a good life and loves sharing her knowledge and skills with clients.

Dr Stephen Chalk MA MBBS FRACGP 

One of Medika Health’s founders and Principle GPs, Dr. Steve has a non-judgemental and empathetic approach to collaborative healthcare. He has special interests in pain, addiction, chronic disease and preventative health. He has diploma qualifications in skin checks and advanced skin cancer surgery. His background training includes rural General Practice and Emergency Medicine.

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Dr. Steve’s passion and calling is Cannabinoid medicine. He is one of the leading Authorised Prescribers in the State and is experienced in treating the full range of indications in all age groups. He is an active Cannabis educator and holds the position of Medical Director for Cannaponics Ltd.

Dr Jay Phang

Dr Jay’s career in patient care has been shaped by a unique story. Born in Penang, Malaysia, Jay moved to Karratha WA for his schooling years. He began a career in medicine after being awarded the Country Medical Foundation scholarship to study in Perth, and graduated as the top of his year group in General Practice.  After working as an intern at Fremantle Hospital he moved overseas, working in trauma and emergency medicine in Cork, Ireland, and then in Bristol and Cornwall in the UK. He then embarked on many diverse medical and travel experiences ranging from working with the Royal Australian Flying Doctor’s service in the Northern Territory with Indigenous communities to spending time ‘working’ in the Caribbean.

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After nearly ten years of emergency work and travel between Ireland, Perth and Melbourne, Dr Jay spent a number of years in Fitzroy and Collingwood.  He worked with the North Yarra Community Health Centre with a focus on complex social issues, refugee health and drug and alcohol rehabilitation.

Jay soon swapped flat whites for fat rights and moved to the Surfcoast where he commenced collecting and restoring surfboards, chasing waves and reading daily swell charts. He joined the Karuna Maya Medicine team in Jan Juc in 2011. Aside from a passion for surfing and snowboarding Dr Jay has dedicated much of his life to the world of skateboarding doing everything from riding boards, consulting on skate park designs and writing articles on health and safety for ‘Australian Skateboarding Magazine.’

Jay has an immense interest and passion for medicine. “I value the importance of continuity in care and strive to see my patients on a regular basis as needed.  I value the development of a doctor patient relationship.  I believe in preventative medicine, and a holistic approach to health care in general.”

Dr Jay also has interests in providing advice in areas of travel medicine, mental health, men’s health and sports medicine. He has recently completed a qualification with the Australian Medical Acupuncture College.  His interest in Cannabinoid Medicine arose in response to a community need for alternative pain relief and medication without the debilitating side effects of ‘conventional’ medicines.  A lifelong interest and advocate of herbal and traditional medicine enabled him to now focus on medicinal cannabis as a viable and effective solution to issues such as pain, symptoms of cancer and its treatment, insomnia, anxiety and neurological disorders.  Diagnosed with Young Onset Parkinson’s Disease in 2009, he found the personal health benefits of Medicinal Cannabis too beneficial not to share while he is still able.

In 2021 he launched The Coastal Cannabis Clinic to specialise and focus on quality and personalised Cannabinoid Medicine to his Surfcoast community and beyond.

Dr Nic Giummarra

I am fully qualified, vocationally registered GP with the FRACGP. After many years of working as a family doctor, I have decided to sub-specialise in this exciting field of medicine whilst working from home and spending more time with my young family. Having been a part of busy medical practices, I have a strong desire to keep the number of patients I see capped to ensure quality, personalised and attentive service, whilst being available for reliable follow up.

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Throughout my medical career I have trained and worked as an Integrative / holistic doctor, in Youth mental health through HeadSpace, as well as Drug and Alcohol Medicine.

I believe there is growing evidence that supports medicinal cannabis’ ability to help patients where other pharmaceuticals have failed, and will encourage new patients to join clinical trials to help grow the evidence.

I also see a strong need to support our rural and regional colleagues and their patients provide a flexible attentive service to allow them to access medicinal cannabis.

Although I cannot guarantee that initial consultations will lead to prescriptions, I can assure you that any advice given will take into patient’s holistic circumstances, as well as the medical recommendations.

Dr Shu Ng

Dr Shu Ng (affectionately known as Dr Shu) graduated from Monash University in Melbourne, Australia in 2010 and has 10 years of postgraduate medical experience in various medical and surgical specialties. She undertook an 18-month Radiation Oncology research fellowship at Memorial Sloan Kettering Cancer Center in New York, USA, whilst completing her Master of Public Health (MPH) with University of Sydney. After her return to Melbourne, she spent 3 years in Radiation Oncology specialty training at Alfred Health and Peter MacCallum Cancer Centre.

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Dr Shu approaches her patients with kindness, compassion and holistic care. She has broad interests within medicinal cannabis including managing chronic pain, mental health, women’s health, neurodegenerative and seizure disorders and autism spectrum disorders. She is very passionate about helping patients undergoing cancer treatment or experiencing cancer-related symptoms, as well as managing symptoms in palliative care.

To date, Dr Shu has managed over 500 patients and their journey with medicinal cannabis. She is an Authorised Prescriber and has also made over 600 TGA Special Access Scheme (SAS) applications to access medications. Dr Shu is a member of the Society of Cannabis Clinicians (SSC) and Society of Cannabis Clinicians Australian Chapter (SSCAC). She is also completing her multidisciplinary Fellowship with the Australasian Society of Lifestyle Medicine (ASLM).
Outside of medicine, Dr Shu adopts a healthy and holistic lifestyle, and enjoys spending time with her partner Paul and two Italian Greyhounds Vino and Ava.

Start your journey
At Astrid, our team are here to help you navigate your holistic health journey. If you’re a patient wanting to chat about your medical condition, we’d love to help.