| A | B |
|---|
| OMHA | Office of Medicare Hearings and Appeals |
| OR | Operating Room |
| OSHA | Occupational Safety and Health Administration |
| OT | Occupational Therapy |
| PA | (1) Physician Assistant; (2) Pathological Assistant |
| PACS | Picture Archiving and Communication System |
| PACU | Post Anesthesia Care Unit |
| PB | Phlebotomist |
| PEN | Parenteral and Enteral Nutrition |
| PET-CT | Positron Emission Tomography – Computed Tomography |
| Pharm.D | Doctor of Pharmacy |
| PHI | Protected Health Information |
| PICU | (1) Pediatric Intensive-Care Unit; (2) Psychiatric Intensive-Care Unit |
| PM | Preventative Maintenance |
| PPE | Personal Protective Equipment |
| PR | Patient Responsibility |
| PT | Physical Therapy |
| RAD | Respiratory Assistive Device |
| RFID | Radio Frequency Identification |
| RHHI | Regional Home Health Intermediary |
| RICU | Respiratory Intensive-Care Unit |
| RIS | Radiology Information System |
| RN | Registered Nurse |
| RO | (1) Reverse Osmosis; (2) Regional Office, CMS |
| R.Ph | Registered Pharmacist |
| RPN | (1) Registered Practical Nurse – see LPN; (2) Registered Psychiatric Nurse |
| RRT | Registered Respiratory Therapist |
| RSN | Renal Support Network |
| RSNA | Radiological Society of North America |
| RT | (1) Respiratory Therapy; (2) Radiologic Technologist; (3) Respiratory Therapist |
