| Abbreviation | Meaning |
| BMR | basal metabolic rate |
| BP | blood pressure |
| BPH | benign prostatic hypertrophy |
| BRP | bathroom privileges |
| BUN | blood urea nitrogen |
| Bx | biopsy |
| c with a line over it | with |
| c/o | complaint of/complains of |
| CA | cancer |
| Ca | calcium |
| cal | calorie |
| Cap | capsule |
| Cath | catheter |
| CBC | complete blood count |
| C/C | chief complaint |
| cc | cubic centimeter |
| CCU | coronary care unit |
| CDC | Centers for Disease Control |
| CHF | congestive heart failure |
| cm | centimeter |
| CNA | Certified Nursing Assistant |
| CNS | Central Nervous System |
| CO2 | carbon dioxide |
| COPD | chronic obstructive pulmonary disease |
| CPR | cardiopulmonary resuscitation |
