If you go to the emergency room and end up staying in the hospital, you may assume that you have been officially admitted. But it turns out that even though you are receiving treatment in a hospital bed, you may simply be under observation, and technically are still an outpatient. That can cost you money if you are covered under Medicare, the federal health plan for older Americans. The distinction between inpatient and outpatient care is important: Medicare pays different rates accordingly. Read the full article.