Glossary # | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z O ObservationObservational StudiesObstetrical SystemsObstetrics and GynecologyOccupational Health ServicesOccupational Safety & Health Administration (OSHA)Occupational TherapistOff-label useOncologyOncology Information System Online Mendelian Inheritance in Man (OMIM)Open Payments DataOperating Room (OR)Operating Room Management SystemOphthalmologyOpioidOrgan TransplantOriginal BiologicOrphan Drug Orthopedic CentersOtolaryngologyOut-of-Network Co-InsuranceOut-of-Network CopaymentOut-of-Pocket LimitOutbound SalesOutmigrationOutpatient CareOutpatient Center Outpatient ClaimOutpatient ProcedureOver-The-Counter (OTC)Own Brand Labeling (OBL)