Chaplains are salaried staff in most American hospitals of any size. The reasons are institutional and practical, and the training involved is more formal than the title suggests.
Accreditation expects spiritual care
Hospital accreditation standards address patients' spiritual, cultural and religious needs, particularly around end-of-life care and treatment decisions.
Meeting that expectation requires someone with responsibility for it, and hospitals resolve that by employing chaplains and maintaining a department rather than relying on outside clergy.
The role is therefore embedded in operations, with chaplains carrying pagers, attending rounds and responding to codes alongside other staff.
Training is clinical and supervised
Board certification generally requires graduate theological education plus clinical pastoral education, which involves supervised units of hospital work with structured reflection.
That supervision emphasizes examining one's own reactions, since a chaplain's task is to be present to someone else's situation rather than to resolve their own discomfort.
Certified chaplains are trained to serve people of any tradition and of none, which distinguishes the role from a visiting minister serving a congregation.
The work is mostly not religious ritual
Much of a chaplain's day involves sitting with people waiting for results, helping families discuss what a patient would have wanted, and being present after a death.
Ritual is provided when requested, and chaplains coordinate with community clergy when a patient's own tradition calls for someone from it.
Staff support is a substantial and less visible part of the role, particularly for units where death is frequent and debriefing is otherwise unavailable.
Ethics committees rely on them
Chaplains commonly serve on ethics committees, where decisions about withdrawing treatment or resolving disagreement among family members are discussed.
Their contribution is usually articulating what a patient's values appear to be, drawn from conversations that occurred outside the clinical encounter.
That information is frequently unavailable to the medical team, whose contact with the family is organized around decisions rather than around history.
What the role does not claim
Chaplains are not psychotherapists, and certification does not confer authority to diagnose or treat mental health conditions.
Hospitals staff both roles, and a chaplain encountering clinical distress refers to behavioral health rather than attempting to address it.
The distinction matters because grief, existential distress and depression can look similar from outside, and telling them apart is clinical work.