Patient Pathway Coordination (PPC) improves patient care quality and safety, particularly in oncology. PPC roles, such as nurse coordinators (NCs), have positively impacted the quality of patient care and reduced financial costs. However, NCs and their real activities in Health Care Organizations (HCOs) are unclear. Our aim was to identify, quantify, and compare all activities performed by NCs in oncology care settings from an organizational approach. Methods: We used qualitative and quantitative approaches based on case study principles. We accumulated 325 observation hours by shadowing and timing the activities of 14 NCs in four French HCO in oncology. Data analysis was conducted using an analytical framework to investigate the Activity of PAtient PAthway Nurse Coordinators in Oncology (APANCO). Results: Our research generated important findings: (1) NC roles and job titles are not standardized. (2) Non-coordination related activities are important in NC work content. Non-coordination times were consistent with distribution times between ward NCs and NCs in centralized structures. Ward NCs had higher non-coordination activities when compared with NCs in centralized structures. (3) PPC times varied for both ward NCs and NCs in centralized structures. Ward NCs performed less design coordination when compared with NCs in centralized structures, and this latter group also performed more external coordination than ward NCs. Conclusions: NCs do not just perform PPC activities. Their position in HCO structures, wards, or centralized structures, influence their work content. Centralized structures allow NCs to focus on their PPC roles. We also highlight different dimensions of NC work and training requirements. Our study could help managers and decision-makers develop PPC roles in oncology.