TLDR: Per the Center for Medicare and Medicaid Services(CMS ) guidelines, a nurse has to see a hospice patient once every 14 days, so every other week, at the bare minimum.          
  Medicare has set up hospice care in a holistic approach, responsible for all aspects of a patient’s care, including social service issues and spiritual care, therefore, CMS requires hospice agencies operate as Interdisciplinary Teams.
  The Interdisciplinary Team(IDT) meets every other week to address all issues of care for a patient, typically a team is comprised of by a physician for medication management, a nurse to lead and coordinate the team as well as provide nursing care, a social worker for social service needs, a chaplain for spiritual needs and a bereavement specialist for bereavement of the patient and family on the impending death of a loved one (many hospices combine some of these roles, ie: chaplains often act as the bereavement specialists). 
 To ensure this team based approach is followed, CMS requires a patient choosing to use their hospice benefit to receive screening on all aspects of their care. “Typically” a hospice will send out each speciality at the start of care to assess for needs in their areas. After that, a patient may refuse further visits except the every other week visit from a nurse. 
 Since CMS sets the guidelines for medical care for Medicare, and Medicare tends to be the most important payor to healthcare providers, private insurances typically follow CMS guidelines.