Patient-reported outcome measures (PROMs) are valued in healthcare evaluation for bringing patient perspectives forward, and enabling patient-centered care. The range of evidence permitted by PROMs to measure patients’ quality of life narrowly denies subjective experience. This neglect is rooted in the epistemic assumptions that ground PROMs, and the tension between the standardization (the task of measurement) and the individual and unique circumstances of patients. To counter the resulting methodological shortcomings, this article proposes a hermeutical approach and interpretive phenomenology instead of generic qualitative research methods.