| Abbreviation | Definition |
|---|---|
| BJ | Biceps Jerk |
| BJ | Bone and Joint |
| BJE | Bones, Joints, and Extremities |
| BJM | Bones, Joints, and Muscles |
| BK | Back |
| BK | Below the Knee |
| BKA | BadyKinin Antagonist |
| BKA | Below the Knee Amputation |
| BKD | Bacterial Kidney Disease |
| BL | Bilateral lower lung fields |
| BL | Blood Loss |
| BL | Broken Leg |
| BLAD | Bladder |
| BLD | Blood |
| BLE | Both Lower Extremities |
| BLLB | Bone Ligament Labrum Bone |
| BLOOD | Brotherly Love Overcomes Our Depression |
| BLP | Bare Light Perception |
| BLQ | Both lower quadrants |
| BLS | Basic Life Support |