Common Medical Abbreviations and Acronyms

1. ON
   oral nasal
2. ONO
   Office of Network Operations
3. ONR
   Office of Naval Research (U.S.)
4. OOIA
   Office of International Affairs
5. OOP
   Office of The President
6. OP
   Outpatient Department
7. OP
   Office of The President
8. OP
   Operator
9. OP
   Ophthalmology
10. OP
    Osteoporosis
11. OP
    Operational
12. OP
    Outpatient
13. OPA
    Oropharyngeal Airway
14. OPAFS
    Office of Post Award Financial Services
15. OPC
    Outpatient Center
16. OPCAB
    Off-Pump Coronary Artery Bypass Surgery
17. OPD
    Outpatient Department
18. OPER
    Operator
19. OPER
    Operational
20. OPER
    Operations

Last updated: May 2, 2025 — Total entries: 7,183