Health technology assessment (HTA) recommendations informed by patient concerns are seen to ensure democracy and legitimacy. We explored how written and oral patient involvement in two HTAs was reported on in publicly available final recommendations and discussion summaries of appraisal committees from three HTA bodies. We aimed to gain insights into how patient input was utilized by appraisal committees to better understand the goals of patient involvement and how these are being achieved. In each of the three HTA bodies, templated submission questionnaires provide a formal process for seeking written patient group input. Additionally, the National Institute for Health and Care Excellence (NICE) selects patient experts to provide a templated submission and attend appraisal committee meetings. For Scottish Medicines Consortium (SMC), a patient advocate and clinician combined meeting (PACE) discussed the cancer drug, referred to in the final recommendation. The discussion summaries of all appraisal committees contained references to patient involvement. Where two mechanisms for patient involvement were provided, oral input from the expert patients and PACE were more clearly documented than information from written patient group submissions. NICE reports focused on the perspective of the patient expert. The SMC report highlighted feedback from the PACE throughout. We suggest that the lack of clear reporting on the use of patient group input in deliberations and therefore accountability to patient groups limits progress in patient involvement in HTA. Patient groups may therefore not have a clear understanding of what information they can best provide to inform deliberations, and in reporting back to members.