Human Tissue Authority

The regulator for human tissue and organs

About Accredited Assessors

Under the Human Tissue Act 2004, any potential donation of bone marrow or peripheral blood stem cells (PBSC) from adults who lack capacity to consent and children who lack competence to consent, must be assessed by an Accredited Assessor (AA) and a report submitted to the HTA for decision.

The HTA trains AAs to assess potential bone marrow and PBSC donations from adults who lack capacity and children who lack competence to consent.

Once accredited by the HTA, AAs act as a representative for the donor and the HTA.

Following an assessment, AAs submit a report of their assessment to the HTA. The HTA makes the decision whether or not to approve the proposed donation.


The current version of the Guidance for Transplant Teams and Accredited Assessors is in the process of being revised and has been intentionally removed. Please contact us directly for advice and guidance on specific cases.

Further information about the role of the AA is available in the HTA’s code of practice on the Donation of allogenic bone marrow and peripheral blood stem cells for transplantation.

For enquiries about the AA role, the person specification, or further information on how to apply to become an AA, please email or call 020 7269 1900.