Standard administration and scoring of the Prolonged Grief Disorder –Clinician Administered (PGD-CA) Version are needed to produce reliable and valid scores and diagnostic decisions. The PGD-CA should be administered only by qualified interviewers who have formal training in structured clinical interviewing and differential diagnosis, a thorough understanding of the conceptual basis of Prolonged Grief Disorder and its various symptoms, and detailed knowledge of the features and conventions of the PGD-CA itself.