
Hospitals use code names to alert staff to an emergency and convey essential information quickly and with minimal misunderstanding. These codes are often announced over a public address system or communicated directly to staff via pagers. While there is no formal definition of a code, hospitals and clinics use them for a range of emergencies, and each facility can decide how to manage and inform staff of potential emergencies. Some codes are standardised, such as code blue, which is universally recognised and indicates a medical emergency, and code red, which means fire or smoke. However, there is a lack of national standardization, and each hospital or hospital association is responsible for developing its own emergency codes, which can cause confusion.
| Characteristics | Values |
|---|---|
| Purpose | Convey essential information quickly with minimal misunderstanding to staff while preventing stress and panic among visitors to the hospital |
| Activation | Pushing an emergency alert button, dialing a specific phone number, or via a pager system |
| Examples | Code Blue, Code Red, Code Black, Code Grey, Code Pink, etc. |
| Code Blue | Cardiac/respiratory arrest, cardiopulmonary arrest, or non-patient medical emergency |
| Code Red | Fire or smoke |
| Code Black | Bomb threat, active shooter, or hospital at capacity |
| Code Grey | Physical threat requiring security, or unarmed individual posing a threat |
| Code Pink | Mother unexpectedly going into labour or newborn medical emergency |
| Standardization | Varies across hospitals and countries, with some countries adopting standardized codes |
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What You'll Learn

Code Blue: Cardiopulmonary arrest or medical emergency
Hospital emergency codes are coded messages announced over a public address system to alert staff to various classes of on-site emergencies. They are designed to convey essential information quickly and clearly to staff, while preventing stress and panic among visitors.
Code Blue is one of the most common emergency codes and indicates a patient requires resuscitation or immediate medical attention, usually as a result of a respiratory or cardiac arrest. It can also refer to a medical emergency involving a non-patient, such as a visitor or staff member, or a patient in a non-clinical area. Code Blue can also refer to a deteriorating patient in a clinical area. When called, the announcement usually takes the form of "Code Blue, [floor], [room]" to alert the resuscitation team where to respond.
Every hospital has its own policy for Code Blue events. Some hospitals assign duties for Code Blue to clinical employees at the beginning of each shift. Others may have a policy that calls for everyone near the emergency to report to the Code Blue. Some hospitals may have a dedicated Code Blue or resuscitation team.
Code Blue teams are trained to respond to medical emergencies and perform cardiopulmonary resuscitation (CPR) and use a defibrillator. They may also use medications such as epinephrine and amiodarone. The team leader is a physician who directs the resuscitation effort.
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Code Red: Fire or smoke detected
Hospital emergency codes are used to alert staff to an emergency or significant event. They are coded messages announced over a public address system to convey essential information quickly and clearly, while preventing panic among patients and visitors.
Code Red is a hospital emergency code that indicates a fire or probable fire on the premises. Staff may activate Code Red if they see or smell smoke, or if walls or doors feel hot to the touch. It is typically accompanied by information about the fire's location and will usually require evacuation.
The R.A.C.E. system is used during Code Red to prioritize the actions of hospital staff:
- Rescue: Help people in immediate danger and move them to safety. This includes moving critical patients with their life-sustaining equipment and performing a headcount to account for all patients and personnel.
- Alarm: Activate the fire alarm and announce the Code Red over the intercom system, usually three times.
- Confine: Close doors as per procedure to prevent the spread of fire.
- Extinguish: Use fire extinguishers or other fire suppression methods to put out the fire if it is safe to do so.
In some cases, hospitals may choose to quietly alert staff first via mobile devices before activating the fire alarm and making the Code Red announcement. This allows them to begin the R.A.C.E. system and start evacuating patients and personnel before the alarm is triggered.
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Code Black: Bomb threat or hospital at capacity
Hospital emergency codes are coded messages announced over a public address system to alert staff to various classes of on-site emergencies. They are intended to convey essential information quickly and with minimal misunderstanding to staff while preventing stress and panic among visitors. These codes are sometimes posted on placards throughout the hospital or printed on employee identification badges for ready reference.
Hospital emergency codes vary widely by location, even between hospitals in the same community. This has led to the proposal and sometimes adoption of standardised codes. For example, in many American, Canadian, New Zealand, and Australian hospitals, “code blue” indicates a patient has entered cardiac arrest, while “code red” indicates a fire has broken out.
Code Black is used to indicate a bomb threat or an active shooter situation. Upon activation of Code Black, hospital staff take immediate action to protect themselves, patients, visitors, and the facility from harm or injury. While the exact procedures for responding to a Code Black may vary between hospitals, staff will generally follow established protocols for evacuating patients, securing the facility, and contacting law enforcement or security personnel.
In the UK, hospitals have standardised codes across individual NHS trusts (England and Wales) and health boards (Scotland). A Code Black in the UK is declared when a hospital is at capacity, with no available beds for new admissions from A&E. The hospital's general bed manager declares a Code Black and then relays this to the local ambulance service and posts updates for local healthcare services.
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Code Pink: Unexpected labour or newborn emergency
Hospital emergency codes are coded messages announced over a public address system to alert staff to various classes of on-site emergencies. These codes aim to convey essential information quickly and with minimal misunderstanding to staff while preventing stress and panic among visitors. Hospital emergency codes vary widely by location, even between hospitals in the same community. However, "Code Pink" generally indicates that a mother is going into unexpected labour or that there is a newborn medical emergency.
Code Pink was developed by Columbia Hospital for Women as an emergency system for neonatal resuscitation. It provides a team of highly skilled professionals to deliver emergency care and improve outcomes for high-risk neonates in their first moments after birth. The system includes vital signs data and flow sheets, as well as communication protocols and staff movement procedures.
In the context of unexpected labour or newborn emergencies, Code Pink prompts skilled care providers to step into action using the best evidence-based practices. This may include providing assisted ventilation, cardiac compressions, and/or administering emergency medications. It is important to note that hospitals, such as the Waterloo Regional Health Network, prioritize care based on need, especially in emergency situations.
While Code Pink specifically refers to neonatal emergencies, other codes exist to address different situations. For example, Code Black in Australian hospitals indicates that an individual is armed and poses a threat to themselves or others, while in the UK, it means that the hospital is at capacity with no available beds for new admissions. Code Red typically signifies a fire or a rapid response situation, while Code Blue indicates cardiac or respiratory arrest. These codes help hospitals manage emergencies effectively and provide timely care.
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Code Grey: Unarmed individual posing a threat
Hospital emergency codes are coded messages announced over a public address system to alert staff to various classes of on-site emergencies. They are designed to convey essential information quickly and with minimal misunderstanding to staff while preventing stress and panic among visitors. Hospital emergency codes vary widely by location, even between hospitals in the same community.
Code Grey is an internal emergency code used by healthcare facilities to alert staff about a potential threat within the facility. It is a term commonly used in hospitals, schools, and workplaces to denote a specific situation or event. It indicates that security is needed due to an unarmed individual who is a threat to themselves or others. The exact definition of Code Grey may vary between institutions, but it typically involves situations such as violence, physical assault, aggressive behaviour, or the presence of weapons on the premises.
When Code Grey is activated, it serves as a signal for staff to take immediate action and follow predefined protocols to mitigate the threat. This may involve alerting staff members through designated communication channels, initiating lockdown or evacuation procedures, coordinating with law enforcement agencies, and providing support and assistance to affected individuals. The primary purpose of Code Grey is to ensure the safety and well-being of individuals in a specific environment. It helps to provide a structured and coordinated response to emergency situations, minimising confusion and ensuring a swift and effective response.
To effectively respond to Code Grey situations, healthcare facilities must prioritise training and preparedness. Staff members should receive comprehensive training on recognising the signs of potential threats, understanding Code Grey protocols, and implementing appropriate responses. Regular drills and simulations can reinforce this training and ensure that staff members are well-prepared to handle emergencies. Clear communication is also crucial during a Code Grey situation. Staff members should be trained on effective communication strategies, such as using designated codes or signals to convey information without causing panic among patients and visitors.
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Frequently asked questions
Silent codes in hospitals are coded messages used to alert staff to various classes of on-site emergencies. They are often announced over a public address system or communicated directly to staff via pagers.
A commonly used silent code is "code blue", which indicates a medical emergency, often specifically referring to cardiopulmonary or cardiac/respiratory arrest.
Yes, silent codes can vary between hospitals, even between hospitals in the same community. Some countries, such as England and Canada, have standardised codes across all hospitals.
Silent codes are used to convey essential information quickly and with minimal misunderstanding to staff. They also prevent stress and panic among visitors and patients.



























