- Radiation (exposure to),
- Range disease, W94.11
- Rape (attempted), T74.2-
- Rat bite, W53.11
- Reaching (prolonged) (static), X50.1
- Reaction, abnormal to medical procedure, see Complication of or following, by type of procedureY84.9
- Recoil,
- Reduction in,
- Rock falling on or hitting (accidentally) (person), W20.8
- Run over (accidentally) (by),
- Running,
- Running off, away,
- Rupture pressurized devices, see Explosion, by type of device