Essential Industry Resources (External) Hospital Outpatient Prospective Payment System hospitaloutpaysysfctsht Federally Qualified Health Center (FQHC) fqhcfactsheet Medicare Claims Processing Manual Chapter 14 - Ambulatory Surgical Centers https://www.cms.gov/Regulations-and-Guidance/Guidance/Manuals/Downloads/clm104c14.pdf Medicare Claims Processing Manual Chapter 4 - Part B Hospital (Including Inpatient Hospital Part B and OPPS) https://www.cms.gov/Regulations-and-Guidance/Guidance/Manuals/Downloads/clm104c04.pdf