Development of an observational tool to assess health coaching fidelity.

Objective: This study describes the development of the Health Coaching Index (HCI), an observational tool for assessing fidelity to implementing health coaching practical skills.

Methods: Initial HCI items were developed, adapted following cognitive interviews, and refined during coding training. Participants (n = 42) were trainees who completed a National Board for Health and Wellness Coaching (NBHWC)-approved training program and coached a standardized patient.