Acronyms

Glossary

An acronym is a term formed from the initial letter or letters of each of the major parts of a compound term. This list explains acronyms found on the cms.hhs.gov web site and other acronyms that are commonly used. This list is not a legal document. Select one of the following letters to view the list of acronyms that begins with that letter.

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Glossary and Acronyms
Acronym Term
OMR Optical Mark Reading
OMRA Other Medicare Required Assessment
OMS Oversight and Management System
OOP Object Oriented Programming
OOSA Out of Service Area (use OSA)
OP Organization Purpose
OP Outpatient
OP Overpayment
OPA Organ Procurement Agency
OPAC Online Payment & Accounting Collection (System) (Treasury)