About Us

Welcome to Brisbane Blood Specialists. We are a group of dedicated and highly trained specialists committed to providing expert, personalised care.

The structure of our clinic means our patients have rapid access to specialist haematology-oncology care as soon as a diagnosis is suspected. We are also investigators in ground-breaking research in lymphoma, myeloma and leukaemia, helping our patients access new treatments through clinical trials.

We see patients out of our rooms at Greenslopes Private Hospital, with treatment at the Cyril Gilbert Cancer Centre. Where it’s safe to do so, we also offer telehealth appointments to patients elsewhere in Queensland and further abroad to ensure our patients have equal access to expert care.

Brisbane Blood Specialists

At Brisbane Blood, we provide cutting-edge care and compassionate support to our patients, ensuring that every journey towards better health is met with expertise and empathy.


Nathan Klose

Clinical Haematologist


Dr Klose completed his Bachelor of Medicine and Bachelor of Surgery at the University of Queensland where he was awarded First-Class Honours for his research applying next-generation genetic testing to the diagnosis and treatment of bone marrow disorders.

He undertook Physician Training at Mater Hospital Brisbane, and was awarded the Royal Australasian College of Physicians Trainee Research Excellence Award for his investigation into the causes of abnormal platelet counts.

His Advanced Training in Haematology was completed at Greenslopes Private Hospital and the Royal Brisbane and Women’s Hospital where he developed expertise in the diagnosis and management of leukaemia, lymphoma and myeloma, as well as non-malignant haematology such as disorders of bleeding and thrombosis.

He is experienced with the application of chemotherapy, immunotherapy, novel small molecule inhibitors (including chemotherapy-free treatments) and cellular therapies including bone marrow transplantation and CAR-T cell therapy. Dr Klose Chairs the Greenslopes Private Hospital Lymphoma multi-disciplinary team (MDT), and is an active member of the Haematology Society of Australia and New Zealand (HSANZ) and Australasian Leukaemia and Lymphoma Group (ALLG).

As a dual-qualified clinical and laboratory haematologist, Dr Klose also continues to work behind the microscope to ensure his patients receive precise and timely diagnoses. He also knows that providing world-class, quality care takes a team, and he leverages his relationships with local and international multidisciplinary experts to access clinical trials and novel therapies.

Dr Klose believes the best outcomes can only be achieved when cutting-edge medical research is applied with a truly personal approach. 

Receiving the best care means understanding your diagnosis, tests and the treatment options—including when it is best not to treat. Dr Klose looks forward to partnering with you as your specialist.

Consulting at:


Ritesh Chatrapati

Clinical Haematologist


Dr Ritesh Chatrapati is a highly qualified clinical haematologist with the Brisbane Blood Specialists clinic at Greenslopes Private Hospital. He has deep clinical and research experience diagnosing and managing a wide range of malignant and non-malignant haematological disorders, including leukaemia, lymphoma, myeloma, stem cell transplantation, bleeding disorders and thrombosis.

Dr Chatrapati graduated from Rajiv Gandhi University of Health Sciences, Bangalore, India, in 2003. Before commencing his haematology training, he undertook physician training in the UK and Australia and gained invaluable experience which assists him in providing holistic and personalised patient-centric care. In addition, he undertook clinical and laboratory haematology training at Cairns Base Hospital, Princess Alexandra Hospital and Royal Brisbane and Women’s Hospital.

He has a dual fellowship from the Royal Australasian College of Physicians (FRACP) and the Royal College of Pathologists of Australasia (FRCPA).

In addition, Dr Chatrapati has membership in the Australasian Leukaemia & Lymphoma Group (ALLG), American Society of Haematology (ASH) and Haematology Society of Australia and New Zealand (HSANZ).

In addition to his work at Brisbane Blood Specialists, Dr Chatrapati is also a Visiting Haematologist at Gladstone Base Hospital.

An inherent part of Dr Chatrapati’s haematological expertise is to work closely with regional and national experts to gain access to clinical trials for his patients. He strongly advocates participation in haematology research and has published several papers in peer-reviewed journals.

His career has always been characterised by an excellent work ethic and an unyielding commitment to his profession. In addition, Dr Chatrapati works closely with his patients and their family members, other specialists, and general practitioners, to provide holistic and all-inclusive care.

Consulting at:


Joshua Tobin



Dr Joshua Tobin

Dr Joshua Tobin is a Haemato-Oncologist and Clinician-Scientist working at Brisbane Blood Specialists at Greenslopes Hospital, as a Staff Specialist Haematologist at the Princess Alexandra Hospital and is a Senior Post-Doctoral Fellow at the University of Queensland.

After completing his medical degree at the Australian National University, he undertook his specialist physician training across the Mater Hospital, Royal Brisbane & Women’s Hospital and the Princess Alexandra Hospital. He completed a PhD focused on ‘immune therapies in non-Hodgkin lymphoma’ at the University of Queensland and went on to pursue a Lymphoma Fellowship at the globally renowned MD Anderson Cancer Centre in Houston, Texas. He is the past recipient of prestigious international awards for his clinical research including the American Society of Haematology Global Scholar Award and the American Society of Clinical Oncology ‘Cure Cancer’ Award, as well as national accolades from the Haematology Society of Australia and New Zealand and Snowdome Foundation.

Dr Tobin’s main passion in haematology is to improve outcomes for patients with haematological malignancies through access to clinical trials and translational research that better select therapies for individual patients. He holds a leadership position on the Australasian Leukaemia & Lymphoma Group working parties for lymphoma and for laboratory science and is a member for the Australasian Lymphoma Alliance where he has led the development of national consensus statements for the management of lymphoma. He is active in national and international clinical research, including as principal investigator on a number of clinical trials in immunotherapy and other novel agents. He is closely involved with Lymphoma Australia and the Snowdome Foundation to provide education sessions and patient resources for Australian patients with blood cancers.

As a clinician working across public, private and academic hospital environments, Dr Tobin is dedicated to working closely with partners in General Practice to provide access to the most up-to-date information, patient support, treatment options and clinical trials available for our shared patients.

Key interests: Lymphoma and related conditions, Chronic lymphocytic leukaemia, Myeloma and Amyloidosis. For a list of research output please visit https://researchers.uq.edu.au/researcher/12783

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