Differentiating moral injury from posttraumatic stress disorder: Implications of the DSM-5-TR moral problems Z-code

The rapid growth of research on moral injury (MI) has outpaced consensus on how the construct should be assessed and differentiated from related trauma syndromes such as posttraumatic stress disorder (PTSD). Building on the recently introduced Diagnostic and Statistical Manual of Mental Disorders (5th ed., text rev.; DSM-5-TR) Z-code for "Moral, Religious, or Spiritual Problem," we briefly review the history of assessment and measurement of the MI construct. We then examine how this new diagnostic category can advance conceptual precision while encouraging broader recognition of moral dimensions in trauma care. We explore how understanding moral identity- defined in the new Z-code as one's sense of the goodness of themselves, others, and institutions and views of right and wrong-functions as a key mediator, linking exposure to potentially morally injurious events (PMIEs) to key symptoms of guilt, shame, and anger. Viewing MI through the Z-code lens both allows for the identification of moral problems and serves as a means to further distinguish morally laden distress from fear-based trauma. This shift has implications for future research on MI measurement; clinician training in the assessment of moral functioning; and integrating spiritual, existential, and relational dimensions into trauma care. Lastly, through analysis of an illustrative case, we propose that the study of injury in relation to one's moral identity represents a distinct diagnostic and therapeutic frontier at the intersection of the social sciences and the humanities.