--- title: "Mast Cell Action — check charity number 1164917 | CharityCompare" description: "Is Mast Cell Action a legitimate UK charity? Check charity number 1164917. Education/training charity based in Nottingham. Official Charity Commission record, key facts and how to claim the profile — on CharityCompare." source: https://www.charitycompare.org.uk/charity/mast-cell-action retrieved: 2026-08-23T15:37:14.233Z license: "Charity data © Crown copyright, Open Government Licence v3.0" --- Quick answer Mast Cell Action is a registered charity (number 1164917) on the Charity Commission for England and Wales register, so it is a legitimate, regulator-overseen organisation. It is registered for: education/training; the advancement of health or saving of lives; disability. Its latest reported income was £132,198 (year ending 2025-03-31). CharityCompare shows its official register record below; a Clarity Score is added automatically once detailed filing history is available. ## What are the key facts about Mast Cell Action? Registered charity number 1164917 Status Registered (active) Charity type CIO Location Nottingham Latest income (year ending 2025-03-31) £132,198 ## What does Mast Cell Action do? To support those affected by Mast Cell Activation Disorders; unite the MCAS community; work with clinicians for better care; promote research; advocate for universal awareness, diagnosis and treatment; and educate the wider community to reduce stigma and improve lives. ## What causes is Mast Cell Action registered for? Education/trainingThe Advancement Of Health Or Saving Of LivesDisability ## Why is there no Clarity Score for Mast Cell Action yet? The Clarity Score is computed from full financial filing history. Mast Cell Action is on the official register but outside the detailed-filing group we currently score (or awaiting its first filings), so we show its official register record instead of a rating. Its score appears automatically once enough filing data exists — never by payment. [How scoring works](https://www.charitycompare.org.uk/methodology) ## Is this your charity? Claim this profile free to add your own description, correct details, or respond publicly. Optional [partner plans](https://www.charitycompare.org.uk/partners) add your logo, photos, verified badge and supporter features — claiming itself is always free and never changes any score. [Claim this profile — free](https://www.charitycompare.org.uk/claim?charity=mast-cell-action&type=claim) ## Frequently asked questions Is Mast Cell Action a legitimate charity? Yes. Mast Cell Action is a legitimate registered charity (charity number 1164917) regulated by the Charity Commission for England and Wales. You can verify it on the official register. Registration proves status — it is not a Clarity Score or an impact rating. What is Mast Cell Action's charity number? Mast Cell Action's charity number is 1164917. Check that number on the Charity Commission register or this CharityCompare profile before you donate. How do I check charity number 1164917? Search 1164917 on the Charity Commission for England and Wales register or on CharityCompare. Confirm the registered name matches the organisation asking for money — scammers sometimes reuse real charity numbers. What does Mast Cell Action do? To support those affected by Mast Cell Activation Disorders; unite the MCAS community; work with clinicians for better care; promote research; advocate for universal awareness, diagnosis and treatment; and educate the wider community to reduce stigma and improve lives. Does Mast Cell Action have reviews and complaints? CharityCompare does not host public user reviews for Mast Cell Action. This basic profile confirms registration and register facts. Rated charities also show a filing-based Clarity Score. For formal complaints, contact the Charity Commission for England and Wales or the Fundraising Regulator as appropriate. How can I donate to Mast Cell Action? Mast Cell Action does not list a website in its register entry. Its official Charity Commission entry lists its contact details — CharityCompare never processes donations. Source: Charity Commission for England and Wales register extract dated 2026-07-31, used under the [Open Government Licence v3.0](https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/). Always verify current details on the [official register entry](https://register-of-charities.charitycommission.gov.uk/en/charity-search/-/charity-details/1164917).