Dr Thomas Marrs
Consultant Paediatric Allergist
- Available from
- London
About Thomas Marrs
Dr Tom Marrs is Consultant Paediatric Allergist 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.
Dr Marrs graduated from Clare College, Cambridge University, in Medicine, and trained at prestigious institutions including St Barts and the Royal London Hospitals, the Astrid Lindgren’s Children’s Hospital of Karolinska, Stockholm, the Royal Brompton of Chelsea, s Hospital and Great Ormond Street
Dr Marrs was awarded his PhD in eczema, food allergy, the prevention of food allergies and role of the microbiome, and has been appointed Director of the Allergy Academy, King’s College London, where he is also a Senior Honorary Lecturer.
Expertise
- Food Allergies
- IgE-Mediated Food Allergy
- Non-IgE Food Allergy
- Eczema
- Atopic Dermatitis
- Allergic and Chronic Asthma
- Allergic Rhinitis
- Allergic Conjunctivitis
- Insect Sting
- Latex Allergy
- Cow's Milk Proctocolitis
- Eosinophilic Oesophagitis
- Difficulty Swallowing
- Gastro-Oesophageal Reflux
- Abdominal Pain
- Constipation
- Diarrhoea
- Faltering Growth
- Difficulty Gaining Weight
- Blood and Component Allergy Testing
- Next-Generation Array Blood Testing
- Skin Prick Testing
- Provocation Food Challenges
- Allergy Prevention
- and Immunotherapy to Environmental Allergens
Overview
- Age of patients seen
- 0-18
- Languages spoken
- English
- Online profiles
- Research highlights
Dr Thomas Marrs has achieved multiple publications in peer-reviewed journals.
Key Publications:
Marrs tom[author] – Search Results – PubMed (nih.gov) shows full listing of publications
Randomised Trial of Introduction of Allergenic Foods in Breast-fed Infants; New England Journal of Medicine, 2016; Randomized Trial of Introduction of Allergenic Foods in Breast-Fed Infants | NEJM
Does atopic eczema cause food allergy? A systematic review; Journal of Allergy and Clinical Immunology; 2016 Does atopic dermatitis cause food allergy? A systematic review – Journal of Allergy and Clinical Immunology (jacionline.org)
Gut microbiota development during infancy: Impact of introducing allergenic foods, Journal of Allergy and Clinical Immunology, 2021; Gut microbiota development during infancy: Impact of introducing allergenic foods – Journal of Allergy and Clinical Immunology (jacionline.org)
Oral Food Challenges; the design must reflect the clinical question; Current Asthma Allergy Reports, 2015 Oral Food Challenges: The Design must Reflect the Clinical Question | SpringerLink
Is there an association between microbial exposure and food allergy? A systematic review; Pediatric Allergy and Immunology, 2013 Is there an association between microbial exposure and food allergy? A systematic review – Marrs – 2013 – Pediatric Allergy and Immunology – Wiley Online Library
- Professional memberships
British Society of Allergy and Clinical Immunology; Paediatric Secretary
European Academy of Allergy and Clinical Immunology
Director of Allergy Academy, King’s College London
Royal College of Paediatrics and Child Health
General Medical Council
- Certifications and Awards
Finalist for Director of Allergy Academy, at BMJ Awards, 2018
Best Registrar Presentation, British Association of Dermatologists, 2016
Barry Kay Prize in Paediatric Allergy, British Society of Allergy and Clinical Immunology, 2014
Distinction in Allergy MSc, Imperial College, 2011
Consultations and services
- Self-pay available from £275
- Health insurance
- Self-pay available
- Health insurance
Insurers covered
- +4 more
- Healix
- Allianz Partners
- Cigna International
- Henner
Tests & treatments
Conditions & symptoms
Locations
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Frequently asked questions
Yes, but only for certain services. Some consultations, assessments, and treatments can be booked directly, while others require a GP or specialist referral. Please check the relevant service page for guidance, and contact the centre if you’re unsure.
We aim to offer appointments as quickly as possible, and many services have same-day or next-day availability. Waiting times vary depending on the appointment type, specialty, and consultant availability, but our team will always offer the earliest suitable appointment.
Yes. You can arrange an appointment for a family member, or someone you care for, just let us know when you get in touch. We’ll need their details and consent to complete the booking, unless you're their legal guardian or have power of attorney.
Your first consultation includes a detailed discussion of your symptoms, medical history, and lifestyle factors, followed by a thorough examination. It’s helpful if you can bring the results of any previous investigations with you, as well as a list of your current medications. Come with a comfortably full bladder so you can provide a urine sample if requested.