Outpatients appointments
020 3313 5000

Visitor Information

Visiting restrictions are in place. Please call the ward to find out more. Find your hospital ward contact information:

Coronavirus update - suspension of routine allergy appointments

Due to coronavirus, we have taken the difficult decision to postpone all planned clinic appointments until further notice. This is to allow respiratory doctors, nurses and clinic staff to support the care of patients admitted to hospital with breathing problems.


Please do not come into hospital for your appointment unless we contact you and ask you to. A doctor will review your case notes in advance of your appointment, and you will be contacted by letter or phone only if there is an urgent recommendation for your care.


As of Monday 30 March 2020, all planned clinic appointments will be postponed.


We will send you a new appointment by post, unless you have opted to be contacted by text or email. If you have any urgent concerns, please contact our secretary on the number below. We will take a message and ask a respiratory doctor to call you.


  • St Marys Hospital0203 312 1344, 0203 312 7942, 0203 312 1149

Please do not call this number for general queries about coronavirus. 

We provide a complete allergy service to diagnose and treat a whole range of allergic diseases, providing expert advice, diagnostic tests and practical help for people affected by allergies, often within a single visit to our allergy clinic.

Our adult allergy service sees over 3300 new outpatients each year and treats more than 400 drug allergy day cases. Imperial College Healthcare NHS Trust (ICHNT) is home to the UK’s oldest allergy clinic and we have built up over 100 years’ experience in allergy vaccines, since providing the world’s first allergen immunotherapy treatment in 1911.

Conditions and treatments

We offer specialist treatments and interventions for a variety of allergic conditions.


  • immediate reactions to food 
  • insect sting and venom allergy
  • immediate reactions to drugs
  • allergic reactions with no clear cause
  • latex allergy

Dermatological conditions

  • Drug allergy urticaria (hives)/angioedema – eliminate allergy as a cause 
  • Allergic rhinitis – seasonal and perennial, consideration of desensitisation to grass/tree pollens for seasonal allergic rhinitis

We offer the following specialist allergy investigations

  • Skin prick testing for immediate hypersensitivity to specific allergens such as inhalants, food, venom, latex, as well as skin prick testing with fresh foods 
  • Blood testing for specific allergies 
  • Lung function testing 
  • Drug allergy skin prick and intradermal testing 
  • Challenge testing for both drugs and food allergies 
  • A specialist dietetic service

The main treatments we can offer in our allergy clinic include

  • Allergen avoidance (direct referral to dietetics for food allergy)
  • Medication advice
  • Anaphylaxis self-management plans and adrenaline autoinjector training
  • Omalizumab for severe atopic asthma
  • Immunotherapy for hayfever (subcutaneous injection or sublingual tablet)
  • Immunotherapy for venom anaphylaxis

Further online resources

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