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Dr. Tom Marrs

PhD MSc HFEA RCPCH MBBS MA(Cantab)

Paediatrician

22 years of experience

London, W1G 0AR

20 connections in healthcare

Skill endorsed

by Dr Emily Derrick, Dr. Gary Stiefel and 7 other professionals

4.97

/5

(242 reviews)

22 years of experience

London, W1G 0AR

20 connections in healthcare

Skill endorsed

by Dr Emily Derrick, Dr. Gary Stiefel and 7 other professionals

Areas of expertise

All
Reviews
Skill Endorsements
Skin Prick Test
163
3
Food Allergies
135
3
Paediatric Consultation
76
1

Contact

Book


Expert in:

About Dr. Tom Marrs

Dr Tom Marrs is Consultant Paediatrician specialising in Allergy and Clinical Immunology, with two decades of experience in the treatment of children's allergies. Dr Marrs is Chair of the Paediatric Allergy Committee for the British Society of Allergy and Clinical Immunology (BSACI). He leads the Allergy Prevention Service at Guy's and St. Thomas' Hospital and the Joint Allergy-Gastroenterology Service at Evelina London. He led the Scientific Programme for the BSACI Conference from 2018-2020. Dr Marrs sees private patients at OneWelbeck Marylebone, next to Bond Street, north of Oxford Street.

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 with Adjunct.


Subspecialties

  • Paediatric Allergy, Immunology and Infectious Diseases

Areas of expertise

All
Reviews
(543)
Skill Endorsements
(27)

Click the bar to read reviews or skill endorsements

Skin Prick Test
163
3
Food Allergies
135
3
Paediatric Consultation
76
1
Children's Allergies
64
Allergy Blood Tests
21
1
Allergies
13
3
Paediatric Dermatology
13
1
Eczema (Atopic Dermatitis)
13
1
Rash
8
Allergic Rhinitis (Hayfever)
7
Asthma
5
1
Wheezing
5
Urticaria (Hives)
3
1
Immunotherapy
4
Allergen Desensitisation
1
3
Food Provocation (Challenge) Test
3
1
Cow's Milk Protein Allergy
4
Paediatric Blood Tests
4
Allergy Shots (Immunotherapy)
2
Diarrhoea
2
Video Consultation
1
Constipation
1
Food Intolerance
1
Reflux
1
Lung Function / Spirometry
1
Angioedema (Swelling)
Chronic Cough
Drug Allergies
Immunisations
Insect or Bee Sting Allergies
Reflux and Colic

Registered with

General Medical Council

No. 6077957


Education

University of London

Medicine

Graduated 2003


Qualifications

Education

PhD

MSc

HFEA

RCPCH

MBBS

MA(Cantab)

Memberships

Society of Allergy and Clinical Immunology (BSACI)

European Academy of Allergy and Clinical Immunology

Royal College of Paediatrics and Child Health

British Society of Allergy and Clinical Immunology


Languages spoken

  • English

Insurers

  • Bupa Fee Assured
  • Simply Health (Dental)
  • Cigna
  • Bupa
  • WPA
  • Healix Health Services
  • AXA Health
  • Vitality
  • Aviva Health

Fees

  • New appointment

    £275
  • Follow-up appointment

    £230
*May vary on location

Locations

Welbeck

1 Welbeck St, Marylebone, London, London, United Kingdom, W1G 0AR

4.90(1259 reviews)

Opening hours

Monday - Friday
Saturday
Sunday

Facilities

Wheelchair Accessible
Paid Parking
View practice profile

Opening hours

Monday - Friday
Saturday
Sunday

Facilities

Wheelchair Accessible
Paid Parking
View practice profile

Areas of expertise

All
Reviews
Skill Endorsements
Skin Prick Test
163
3
Food Allergies
135
3
Paediatric Consultation
76
1

Contact

Book

Reviews

AI Review Summary

This summary was created by AI based on recent reviews

Dr. Tom Marrs provides friendly, helpful, knowledgeable, and thorough interactions, ensuring patients feel comfortable and understand their care. He excels at paediatric consultation and allergy testing. Skin prick tests are easy, with Dr. Marrs offering clear explanations of results and detailed management plans for various food allergies and eczema. Patients praise his expertise for managing food allergies, easy skin prick tests, and dedicated paediatric consultations.

5
verified patient
03 Jun 2026

We went to Dr Marrs for an initial visit to check on our toddler's suspected milk allergy. Dr Marrs was very helpful, thoughtful, reassuring and addressed all our questions while simultaneously keeping our daughter engaged.

5
verified patient
02 Jun 2026

Lovely doctor really concerned about patient well being

4.33
verified patient
20 May 2026

This appointment was very helpful and Dr. Tom explained everything beforehand very well

5
verified patient
13 May 2026

He is Funny 😂👍🍻

5
verified patient
12 May 2026

He is sooo good 😊 he does the most less painful pinch if it hurts it’ll soon not hurt. He’s smart and talented but he’s also very funny 😁 If you’re here for eczema he’ll just talk make jokes give you the cream and then look 👀 at you’re eczema.

5
verified patient
07 May 2026

Recently had an appointment for my daughter with Dr Marrs. He built trust and great rapport with both myself and the patient from the onset. I felt heard as a parent, and received sufficient advice of further management. I appreciated his holistic approach - he reviewed more than my initial concerns about a possible allergy, and we agreed on further follow up plans. Genuinely the best experience we’ve had with a paediatrician so far. Would definitely book him again if needed in the future. Also appreciated being seen on time :)

5
verified patient
06 May 2026

Dr. Tom was very patient, empathetic and above all super helpful. We appreciate his help.

5
verified patient
06 May 2026

Dr Marrs explained the diagnosis and treatment options very clearly and patiently, giving us his full attention and serious consideration, to an extent few other doctors do. I am impressed.

5
verified patient
29 Apr 2026

The professionalism of the staff was excellent. Dr Marrs was very courteous and understanding, he showed our daughter his fun side to make her feel at ease to talk to him and would ask her questions about herself.

5
verified patient
29 Apr 2026

Tom is wonderful. He really gives you the time to ask all your questions. He is very good with babies. I would highly recommend him!

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Skill Endorsements

22 Jan 2026
Endorsed for
Video Consultation
Paediatric Dermatology

Dr Emily Derrick

Dr Emily Derrick

Paediatrician
We trained together

Tom is an excellent clinician with a patient centered approach and is extremely knowledgeable. He is aware of the latest research within allergy and actively involved in the British Society of Allergy Clinical Immunology. I would certainly recommend him and he will offer a fantastic service to your child.

07 Jun 2025
Endorsed for
Allergies
Food Allergies
Asthma

Dr. Gary Stiefel

Dr. Gary Stiefel

Paediatrician
I trained them

Tom is a great colleague, who I would be very happy to recommend for children needing food allergy testing.

11 May 2025
Endorsed for
Immunotherapy
Food Allergies

Dr. Bryan McDonald

Dr. Bryan McDonald

Dermatologist
Is a colleague

Dr Marrs is an excellent allergy specialist. He is kind and approachable, as well as highly skilled. We share the care of young children with eczema and I very much value his expertise.

10 May 2024
Endorsed for
Immunotherapy
Allergen Desensitisation
Allergy Shots (Immunotherapy)

Dr Victoria Swale

Dr Victoria Swale

Dermatologist
Is a colleague

FAQ

What are Dr. Tom Marrs's reviews like?

Dr. Tom Marrs's overall patient rating is 4.97 out of 5 stars on Doctify. This is based on 228 reviews.

What languages does Dr. Tom Marrs speak?

Dr. Tom Marrs speaks English

Where is Dr. Tom Marrs located?

Dr. Tom Marrs primarily practices at Welbeck, located at 1 Welbeck St, Marylebone, London, London, United Kingdom, W1G 0AR
See more locations

Does Dr. Tom Marrs accept new patients?

Dr. Tom Marrs generally accepts new patients.

Get in touch with this specialist to enquire as a new patient