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 Obstetrical SystemsObstetrics and GynecologyOccupational TherapistOncologyOncology Information System Open Payments DataOperating Room Management SystemOphthalmologyOpioidOrphan Drug Orthopedic CentersOut-of-Pocket LimitOutpatient CareOutpatient Center Over-The-Counter (OTC)