Facility-Based Outpatient Services
What the exam tests
Facility outpatient coding (hospital outpatient departments, ambulatory surgery centers) differs from physician-office coding. The facility reports the resources used to provide the service, while the professional reports the physician's work. You must know how the UB-04 and CMS-1500 differ, how revenue codes and HCPCS work on the facility side, and the role of the Outpatient Code Editor (OCE) and APC grouping.
Concepts to master
- UB-04 (CMS-1450): facility claim form; uses revenue codes plus HCPCS/CPT.
- APC grouping: outpatient services are grouped into Ambulatory Payment Classifications for payment; status indicators (S, T, N, etc.) tell you how a code is paid.
- OPPS: the Outpatient Prospective Payment System pays facilities by APC; packaging rules bundle some services into the primary procedure.
- Observation vs. inpatient: observation is an outpatient status; a patient can receive observation without being admitted.
- Integumentary and minor procedures: facility coding emphasizes the procedure performed and supplies used.
Traps in questions
A frequent trap is confusing the professional claim (CMS-1500) with the facility claim (UB-04). Another is assuming observation is an inpatient service. Questions may also test whether packaged services are separately billable - usually they are not.
Rule of thumb
Facility = resources and site of service; professional = physician work. Match the claim form and payment system to the setting before answering.