CMS Pub Defines Inpatient vs. Outpatient
- By admin aapc
- In CMS
- January 29, 2010
- Comments Off on CMS Pub Defines Inpatient vs. Outpatient
Misrepresenting a person as an inpatient or outpatient can be a costly mistake, even when unintentional. Differentiating the sometimes fine line between the two types of hospital status, however, can be confusing. To clarify matters, the Centers for Medicare & Medicaid Services (CMS) recently published an electronic document detailing the criteria Medicare uses to determine whether someone is an inpatient or outpatient.
Are You a Hospital Inpatient or Outpatient? If You Have Medicare – Ask! is marketed toward consumers, but anyone working in health care would do well to pocket this handy reference.
Here’s an excerpt:
“An inpatient admission begins the day you’re formally admitted to the hospital with a doctor’s order. The day before you’re discharged is your last inpatient day. You’re an outpatient if you’re getting emergency department services, observation services, lab tests, or X-rays, and the doctor hasn’t written an order to admit you as an inpatient even if you spend the night at the hospital.”
Included is a medical chart detailing common situations and how Medicare Part A and/or Part B would pay.
- Kidney Stones: Breaking Down Endoscopic Lithotripsy - December 1, 2025
- AAPC Announces 2025-2027 National Advisory Board - January 6, 2025
- Coding Posterior Nasal Nerve Ablation - December 2, 2024


