The NHHCS is a survey of US home health and hospice agencies
that are certified by Medicare and/or Medicaid or licensed by a
state to provide home health and/or hospice services, and
currently serve or recently served home health and/or hospice
patients.10 Data collected through the patient health module
provide a nationally representative sample of current home
health patients, defined as patients who were on the rolls of the
agency as of midnight of the day immediately before the agency
interview. In 2007, NHHCS collected medication data of sampled
patients for the first time in the survey’s history