Pastoral care workers and chaplains provide pastoral and spiritual care for everyone. It doesn’t matter what religion, or none, that they have. Pastoral care workers see patients, their families and health professionals. All will have different spiritual and emotional concerns.
A chaplain is usually formally qualified. A pastoral care worker in health care will usually have some training. Chaplains and pastoral care workers have often also been trained or had experience in another field (e.g. nursing, teaching, social work) before they work in pastoral care.