Dr Donald Masi

Consultant psychiatrist


Dr Masi treats everyone with mental health needs as individuals, considering the diversity of people’s backgrounds. His clinical care is comprehensive and empathic.

Position at Priory

Dr Masi joined Priory Hospital Roehampton in June 2022. He works as a full time general adult consultant, managing the inpatient and outpatient care of individuals with a variety of mental health difficulties. He is the line manager of several junior doctors, including GP trainees. He supports the hospital’s governance structures, including the senior management team.


Dr Donald Masi is a general adult consultant psychiatrist. He is an approved clinician, with Section 12 approval, under the Mental Health Act 1983.

Dr Masi studied at Kings College London, where he completed a BSc in Neuroscience and Neuropsychology and his medical degree. He also completed a Diploma in the Philosophy of Medicine before qualifying as a doctor in 2008.

Dr Masi completed his initial psychiatry training in the renowned East London NHS Foundation Trust. He became a member of the Royal College of Psychiatrists in 2013. He sub-specialised in general adult psychiatry, achieving a Certificate of Completion of Training in 2019. During the course of his training, Dr Masi has achieved several awards and bursaries, e.g. Trainee of the Year in 2012. He was appointed, immediately following his completion of training, as a consultant and lead clinician in a busy London Community Mental Health Team. He was later promoted to an associate clinical director position, before joining Priory Hospital Roehampton.

Research Interests

Dr Masi has previously researched the mood disorders in those with neurological disease, including multiple sclerosis (MS) and motor neurone disease (MND). His work supported the expansion of mental health provisions for those with MS in South East London.

Dr Masi worked as a clinical lead in one clinical trial of a novel antipsychotic drug – Pimavanserin. The research assessed the benefits and risks of the medication in managing psychotic symptoms and behavioural disturbances in those with Alzheimer’s disease.

Dr Masi has presented internationally on the ethical considerations of psychiatric practice.

Links to clinical articles/research papers



  • Approved Clinician
  • Bachelor of Science (BSc) degree in Neuroscience and Neuropsychology
  • Certificate of Completion of Training (CCT) of general adult psychiatrist
  • Diploma in the Philosophy of Medicine (DPMSA)
  • Member of the Royal College of Psychiatrists (MRCPsych)
  • On the General Medical Council (GMC) specialist register for General Psychiatry (GMC No. 7014331)
  • Section 12(2) approved (Mental Health Act 1983)
  • Undergraduate medical degree (MBBS)