Dr Iason Thomas

Dr Iason Thomas

Consultant Allergist

MD, PGDip (MedEd), MSc, PhD, MRCP (UK)

Specialises in

  • Allergy testing
  • Desensitisation immunotherapy
  • Allergy blood serum tests (including ISAC test and component-resolved diagnostics)
  • Skin prick allergy tests

I am a Consultant Allergist in one of the UK’s largest Departments of Allergy at Manchester University NHS Foundation Trust, and an Honorary Senior Lecturer at the University of Manchester. I have been working in the field for over seven years.

I have extensive experience in all aspects of allergy care, including anaphylaxis, food allergy, drug allergy, rhinitis (hay fever), latex allergy, venom allergy, urticaria (hives), angioedema (swelling), asthma, and eczema. I also perform highly specialist work in the areas of general anaesthetic allergy, drug challenges, food challenges, and immunotherapy (desensitisation). I treat teenagers (16 years old and above) and adult patients.

I qualified in medicine in 2006, and completed the Academic Core Medical Training Programme in Wales Deanery. I was awarded a competitive NIHR Academic Clinical Fellowship in Allergy, and completed my specialty training at the largest UK Adult Allergy Department at Guy’s and St Thomas’ NHS Foundation Trust in London. I have successfully taken the European (EAACI/UEMS) Knowledge Exam in Allergology and Clinical Immunology. I am one of only a small number of Consultants in the UK with this qualification and specialist accreditation in Allergy.

I have broad experience in laboratory and clinical research, and have completed a master's degree and PhD in Immunology. I contribute to undergraduate and postgraduate teaching, and hold a postgraduate diploma in medical education. I am named clinical and educational supervisor for Allergy Specialty Registrars. I am a published author in the fields of basic immunology, drug and food allergy, and telemedicine.

I am a member of the British Society for Allergy and Clinical Immunology, European Academy of Allergy and Clinical Immunology, World Allergy Organization, Anaphylaxis Campaign, Royal College of Physicians of London, and Hellenic Society of Immunology.


General Medical Council Number: C7121521

Treatment information

Some of the principal treatments carried out by Dr Iason Thomas at Spire include:


Other treatments

  • Allergy blood serum tests (including ISAC test and component-resolved diagnostics)
  • Skin prick allergy tests 

Please note: It is important you do not take antihistamines for at least 3-5 days prior to your appointment

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Important information about Covid-19 tests

COVID-19 testing or antibody tests are not available as a standalone service at Spire Manchester Hospital.


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Additional information

MD / University of Patras / 2006
Medical Degree

MSc (Immunology) / University of Patras / 2010

PGDip in Education for the Health / Swansea University / 2018

PGCert / King's College London / 2019
Applied Research Methods

PhD / University of Patras / 2022

Professional memberships

British Society for Allergy and Clinical Immunology (BSACI)

European Academy of Allergy and Clinical Immunology (EAACI)

Royal College of Physicians (RCP) of London

Anaphylaxis Campaign

World Allergy Organization (WAO)

Hellenic Society of Immunology (HSI)

Consultant Allergist, Manchester University NHS Foundation Trust.

Honorary Senior Lecturer, University of Manchester.

Private secretary Mrs Devora Karali
Private secretary telephone 07831 366 781
Private secretary email info@allergynorthwest.co.uk