| Abbreviation | Definition |
|---|---|
| OCO(CFSAN) | Office of Constituent Operations (CFSAN) |
| OCOD | Office of Communication Outreach and Development (CBER) |
| OCP(CDER) | Office of Clinical Pharmacology (CDER) |
| OCP(OC) | Office of Combination Products (OC) |
| OCPP | Office of Critical Path Programs |
| OCR | Office of Civil Rights |
| OCS | Office of the Chief of Staff |
| OCTEC | Office of Counter-Terrorism and Emergency Coordination |
| OCTEC(CDER) | Office of Counter-terrorism and Emergency Coordination (CDER) |
| OCTGT | Office of Cellular, Tissue, and Gene Therapies |
| OCTGT(CBER) | Office of Cellular, Tissue and Gene Therapies (CBER) |
| OCTMA | Office of Communication, Training, and Manufacturers Assistance |
| OCTMA(CBER) | Office of Communication, Training and Manufacturers Assistance (CBER) |
| OD | Office of the Director |
| OD(CBER) | Office of the Director (CBER) |
| OD(CDER) | Office of the Center Director (CDER) |
| OD(NCTR) | Office of the Director (NCTR) |
| ODA | Orphan Drug Act of 1983 |
| ODAC | Oncologic Drugs Advisory Committee |
| ODE | Office of Drug Evaluation |