Post COVID-19 Condition (PCC) is a complex condition presenting significant challenges for patients. Individuals suffering from severe PCC are often assessed in rehabilitation medicine departments or specialized post-COVID centres, where their condition is evaluated using the International Classification of Functioning, Disability and Health (ICF). The ICF framework primarily focuses on functional impairments, disabilities, and restrictions in participation, with an emphasis on the concept of “functioning.” However, a critical question remains: how does this notion of functioning relate to the well-being of these individuals? This paper explores this issue by examining three fictionalized but typical case studies of PCC patients in relation to two distinct theoretical approaches. First, we engage with theories about well-being from the philosophy of well-being emphasizing the individual’s perspective. Second, we explore relational approaches in bioethics and their theoretical underpinnings, which emphasize how people are situated, considering context and relations rather than purely individual conditions. The paper highlights the potential tensions between these approaches while arguing that a more comprehensive understanding of well-being can emerge by integrating insights from both traditions. Through the examination of PCC patient cases, we propose that well-being can be better understood when approached from multiple angles, enriching the understanding of patient outcomes in rehabilitation medicine.