Code Black: - In Australia code black is a personal threat. This incorporates a diverse range of situations including assaults, confrontations, hostage situations and threats of personal injury or attack
- Bomb Threat (Ontario, Manitoba)
- In the military code black is bomb threat or discovery of suspicious package.

Code Gray/Grey - A combative person with no weapon under HASC suggestions. - Severe Weather

Code Green -A combative person using physical force, especially weapons. (some American hospitals)
-Used to indicate an evacuation situation, and can refer to the evacuation of a ward/floor/wing or the entire hospital

Code Pink - Biohazardous contamination of a patient or staff. (Heartland Regional Medical Center)
- Patient is under influence of illegal substances (UK First Aid organisations)

Code Purple - Australian Standard for Bomb or Substance alert - Hostage situation or patient abduction (Ontario Hospital Association)
- Emergency department can no longer accept patients; divert incoming cases to other hospitals if at all possible

Code Silver - Combative person with a Lethal Weapon (HASC recommendations).
- Violent Situation – Lockdown

Code Yellow - Missing patient

Code Orange - Used in Ontario hospitals to indicate an external disaster with mass casualties. Lockdown or controlled facility access is often used as part of the response. Volunteers, Families and Students were denied access during SARS Outbreak of 2003.

Code Brown - Missing Adult

Doctor Brown: is a code word often used in hospitals to alert security staff to a threat to personnel. If a nurse or doctor is in danger from a violent patient or non-staff member, they can page Doctor Brown to their location and the security staff will rush to their aid. In some hospitals

Dr. Pyro: Fire in the hospital/healthcare facility. “Paging Dr. Pyro on ____” indicates a fire and its origin or current location, e.g. “Paging Dr. Pyro on 3″ means “Fire on third floor”