| A | B |
| CBET | Certified Biomedical Equipment Technician |
| CCE | Certified Clinical Engineer |
| CCU | Coronary Care Unit |
| CCOHS | Canadian Centre for Occupational Health and Safety |
| CDC | Center for Disease Control and Prevention |
| CE | (1) Clinical Engineer (2) Clinical Engineering |
| CLES | Certified Laboratory Equipment Specialist |
| CMN | Certificate of Medical Necessity |
| CMR | Comprehensive Medical Review |
| CMS | Centers for Medicare and Medicaid Services |
| CMS-1500 | Health Insurance Claim Form |
| CPAP | Continuous Positive Airway Pressure |
| COPD | Chronic Obstructive Pulmonary Disorder |
| CPhT | Certified Pharmacy Technician |
| CPM | Certified Professional Midwife |
| CRES | Certified Radiology Equipment Specialist |
| CRN | Certified Radiology Nurse |
| CRNA | Certified Registered Nurse Anesthetist |
| CRT | Certified Respiratory Therapist |
| CRTT | Certified Respiratory Therapy Technician |
| CS | (1) Central Sterile; (2) Central Supply |
| CSICU | Cardiac Surgery Intensive-Care Unit |
| CT | Computed Tomography |
| CTRS | Certified Therapeutic Recreation Specialist |
| CVICU | Cardiovascular Intensive-Care Unit |