There is currently a worldwide focus on improving healthcare. A key element in improving the patient journey is encouraging doctors to electronic medical records. The main objective of this study was to identify, categorize, and analyse some of the factors affecting ambulatory EMR adoption as perceived by doctors at the Nairobi and the Aga Khan Hospital Accident and Emergency Department in order to suggest policy interventions to enhance electronic medical records adoption. This study examined the applicability of the Ambulatory EMR Adoption model by the Human Information Management Systems Society (HIMSS) Analytics, in the context of a large hospital's intention to adopt EMR. The Innovation Diffusion Theory and the Technology Acceptance Model provided a combined theoretical framework for this study. The study was a descriptive survey to examine the Nairobi Hospital and the Aga Khan Hospital EMR systems. The target population was the doctors on permanent contract as well as those on temporary terms. A census survey was done through structured questionnaires to assess the factors affecting ambulatory EMR adoption and perceived benefits of operational EMR. The data collected was then coded and analysed using descriptive statistics (frequencies, percentages, mean and coefficient of variation). The study found that there is a significant statistical effect of psychological factors on ambulatory EMR adoption and the correlation is significant at the 0.01 level (2-tailed). There was no significant statistical effect of organizational and technical factors on ambulatory EMR adoption in this study. Affect had the highest mean of all the psychological factors tested.