Background and Aim: There is currently a lack of standardized key performance indicators (KPIs) in the field of clinical pharmacy in the UK. For this reason, the aim of this thesis was to clearly understand the role of a clinical ward pharmacist relating to direct patient care and to subsequently define KPIs to evaluate the pharmacy performance and service, at the acute teaching Hospital Raigmore in Inverness, Scotland. Objectives and Methods: The identification of the daily clinical pharmacists tasks and the assessment of their frequency was achieved by observing two pharmacists working on two different medical wards at Raigmore hospital. As clinical pharmacists work within a multidisciplinary team, nurses and consultants perception of the ward pharmacy service was also evaluated using Likert scale questionnaires. In order to analyze the most important tasks pharmacists carry out relating to direct patient care a two round modified electronic Delphi study, with pharmacists from three different NHS hospitals, was conducted. Results: Three pharmacy specific, patient focused and pharmacy relevant KPIs were defined for following tasks: medicine reconciliation, checking the correctness and completeness of the Kardex and patient counselling. Conclusion: The results of this thesis provide a more in depth understanding of a ward based clinical pharmacists role at Raigmore hospital. It has identified areas for which clinical key performance indicators should be implemented.