24B Place of Service – overview of CMS 1500

Enter the appropriate two-digit code from the place-of-service code list for each item used
or service performed. The place-of-service codes are available at:

http://www.cms.hhs.gov/PlaceofServiceCodes/Downloads/posdatabase110509.pdf.

Acute Hospitals billing for Professional Services where the service is provided by hospitalbased
physicians only:

To help define the type of facility billing for medical services on a professional claim please
use the following Place of Service Codes.

21 – Inpatient Hospital
22 – Outpatient Hospital
23 – Emergency Room
99 – Hospital Licensed Health Center