Objective To examine reliability aspects of the Gothenburg Direct Observation tool-Person-Centred Care (GDOT-PCC) for assessing healthcare professionals’ competency in delivering person-centred care (PCC) in clinical practice. Design Ongoing observational study. Setting The study was conducted at the Department of Internal Medicine at Sahlgrenska University Hospital/Östra. Participants and methods 50 health professionals (HPs) including nurses, physiotherapists, occupational therapists and physicians were observed and independently rated by two research nurses on the GDOT-PCC while interacting with patients. Directly thereafter, patients and HPs were asked to rate and comment on the HP’s PCC competency using an abbreviated version of the GDOT-PCC.  Results Results from analyses of inter-observer agreement, observer-patient agreement, observer-HP agreement and patient-HP agreement will be presented at the conference. Conclusion We previously assessed inter-observer reliability of the tool using video-recorded patient-HP interactions. This study will provide additional information about its performance in a more challenging real-world setting. Comparisons between patient, HP and observer ratings are expected to further our understanding of the ecological reliability of the GDO-PCC.