Background There is limited evidence to guide best approaches to supportive care delivery to patients with high-grade glioma. I-CoPE (Information, Coordination, Preparation and Emotional) is a structured supportive care approach for people with newly diagnosed high-grade glioma and their family carers. Delivered by a cancer care coordinator, I-CoPE consists of (1) staged information, (2) regular screening for needs, (3) communication and coordination, and (4) family carer engagement. This pilot study tested acceptability and preliminary effectiveness of I-CoPE, delivered over 3 transitions in the illness course, for people newly diagnosed with high-grade glioma and their carers. Methods I-CoPE was delivered at the identified transition times (at diagnosis, following the diagnostic hospitalization, following radiotherapy), with associated data collection (enrollment, 2 weeks, 12 weeks). Outcomes of interest included: Acceptability/feasibility (primary); quality of life; needs for support; disease-related information needs; and carer preparedness to care (secondary). Descriptive statistics were used to assess acceptability outcomes, while patient and carer outcomes were assessed using repeated measures ANOVA. Results Thirty-Two patients (53% male, mean age 60) and 31 carers (42% male) participated. I-CoPE was highly acceptable: 86% of eligible patients enrolled, and of these 88% completed the study. Following I-CoPE patients and carers reported fewer information needs (P <.001), while carers reported fewer unmet supportive care needs (P <.01) and increased preparedness to care (P =.04). Quality of life did not significantly change. Conclusion A model of supportive care delivered based upon illness transitions is feasible, acceptable, and suggests preliminary efficacy in some areas. Formal randomized studies are now required.