Background: The measurement of patients’ experiences of healthcare is increasingly used as an indicator of the quality of care. There are concerns that many mechanisms used to collect patient experience data produce large amounts of superficial data, while missing deeper, more nuanced information that is meaningful to the patient, and that insufficient attention is paid to whether the information is used to make a difference to health care. This is particularly so for Indigenous people in Australia, whose health care experience is impacted by the context of colonisation and discordance between Indigenous understandings of health and the biomedical health system. The aim of this study was to assess the extent to which existing patient experience measures currently in use in Australia collect information about the most critical aspects of cancer care, as identified by Indigenous people affected by cancer and their health care providers in previous research. Methods: A two-stage process was used to examine the adequacy of existing patient experience measures for Indigenous people in Australia: (1) relevant tools and measures were identified and assessed, and four measures were selected as suitable comparators; (2) the comparators were examined in detail and mapped against the topics identified in our earlier research as important to Indigenous people affected by cancer. Gaps in topic coverage in the comparators were identified. Results: No comparators completely captured the critical aspects of cancer care identified by Indigenous people with cancer and their health care providers. The number of topics ‘partially’ captured by the four comparators ranged from 4 to 7 out of 9. While most topics were at least partially covered, the lack of questions around culture and cultural safety was notable. Conclusions: Existing patient experience measurement tools are likely to miss some key aspects of Indigenous peoples’ experiences of cancer care in Australia. Failure to adequately assess experiences of care related to cultural safety may compromise efforts to improve health outcomes. Addressing the gaps requires the development of experience measures that are strengths-based, reflect an Indigenous world view and measure aspects of experience that are relevant to Indigenous people.