Dr Tom Marrs

Dr Tom Marrs

Allergy, Paediatrics 06077957


  • Bupa Platinum consultant
  • Fee assured
  • Open Referral network
Bupa Platinum consultant
Fee assured
Open Referral network

Specialises in

  • Paediatric immunology, infectious diseases & allergy


  • Face-to-face consultations
  • Video and telephone consultations

About me

Dr Tom Marrs is Consultant Paediatrician specialising in Allergy and Clinical Immunology, with nearly two decades of experience in the treatment of children's allergies. Dr Marrs leads the Allergy Prevention Service at Guy’s and St. Thomas’ Hospital and the Joint Allergy-Gastroenterology Service at Evelina London. He was the Scientific Programme Lead for the British Society of Allery and Clinical Immunology from 2018-2020.Dr Marrs sees private patients at OneWelbeck Marylebone, the Spire St Anthony's Hospital in Cheam and the New Malden Diagnostic Clinic.

Dr Marrs graduated from Clare College, Cambridge University, in Medicine, Medical Ethics and Law. He completed his primary medical qualification in 2003 from St Barts and the Royal London Hospital, after taking specialist study at the Astrid Lindgren’s Children’s Hospital, Karolinska Hospital, as well as studying in Sri Lanka and Nepal. Dr Marrs then undertook his specialist paediatrics training at various renowned London hospitals including the Royal Brompton, Great Ormond Street and Guy's Hospital. Since completing his training, Dr Marrs was awarded his PhD in eczema, food allergy and the prevention of food allergies, and has been appointed Director of the Allergy Academy, King's College London, where he is also a Senior Honorary Lecturer.

Areas of interest

Specialist allergy diagnosis; blood and component allergy testing; skin prick testing; food allergy; cow's milk allergy; soya allergy; egg allergy; wheat allergy; fish allergy; cod allergy; salmon allergy; sesame allergy; sunflower mustard linseed seed allergy; nut allergy; peanut allergy; tree nut allergy; cashew nut allergy; hazelnut allergy; almond allergy; brazil nut allergy; pistachio nut allergy; walnut allergy; pecan allergy; seafood allergy; prawn allergy; provocation food challenges; spirometry; lung function testing; allergy prevention; IgE-mediated food allergy; atopic eczema; allergic asthma; allergic rhinitis (hay-fever); immunotherapy to environmental allergens (e.g. house dust mite, pollens, pet dander); allergic conjunctivitis; insect sting; latex allergy; non-IgE food allergy; cow's milk proctocolitis; eosinophilic oesophagitis; difficulty swallowing; gastro-oesophageal reflux; constipation; diarrhoea; faltering growth; difficulty gaining weight.

About me
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