What kind of data files must be collected during the measurement year according to HEDIS?

The collection of supplemental and member-reported data files during the measurement year is crucial because HEDIS measures are designed to provide a comprehensive view of healthcare quality. Supplemental data refers to information that enhances or supports the administrative data, such as clinical data that may not be readily available in the standard claims or encounter data files. Member-reported data allows for insights into patient experiences, satisfaction, and other personal health information that captures care perspectives directly from individuals. This combination helps to ensure a more robust evaluation of health plans' performance regarding patient care and outcomes, ultimately enhancing the quality of services provided.

In contrast, relying solely on clinical data or administrative data may not capture the full scope of healthcare quality, as these types of data can have limitations in reflecting patient experiences or specific clinical nuances. Moreover, the option mentioning any data from healthcare settings is too broad and does not focus on the specific types of data required by HEDIS for valid and reliable measurement. Hence, the correct answer emphasizes the importance of integrating diverse data types for a complete understanding of healthcare effectiveness.