Purpose The purpose of this paper is to understand the components of a high-quality prison healthcare system and the impact, ten-years on, of the transfer of accountability in England, from a justice ministry to a health ministry. Design/methodology/approach A rapid the evidence review was undertaken, which included a review of 82 papers and qualitative interviews with key informants. The concepts and themes identified were summarised and analysed through a framework analysis, designed to improve population outcomes and address health inequalities. The use of a rapid evidence assessment, rather than a systematic review methodology, the use of abstracts (rather than full-text articles) to extract the data, and limiting the search strategy to articles published in the English language only might mean that some relevant research papers and themes were not identified. The need for the evidence to be produced within a limited time frame and with limited resources determined these pragmatic approaches. Findings The review found that English prison healthcare has undergone "transformation" during this period, leading to increased quality of care through organisational engagement, professionalisation of the healthcare workforce, transparency, use of evidence-based guidance and responsiveness of services. The review also highlighted that there is still room for improvement, for example, relating to the prison regime and the lack of focus on early/preventive interventions, as well as specific challenges from limited resources. Research limitations/implications Time and resource constraints meant a rapid evidence review of papers in the English language was undertaken, rather than a systematic review. This might mean relevant papers have been missed. The review also only covered small number of countries, which may limit the transferability of findings. The lack of qualitative data necessitated the use of quantitative data gathered from key informants. However, this enabled a good understanding of current practice. Practical implications The review findings support the World Health Organisation position on the value of integrated prison and public health systems in improving quality of healthcare. It also recommends future policy needs to take account of the "whole prison approach" recognising that healthcare in prisons cannot operate in isolation from the prison regime or the community. Originality/value This is unique research which has great value in supporting prison reform in England. It will also be of interest internationally due to the paucity of data in the published peer-reviewed literature on the impact of commissioning models on healthcare or health outcomes.