Hospital emergency codes are used to efficiently convey important information to staff regarding urgent situations that require targeted, specific responses. Historically, color codes have been used to keep overhead announcements discreet. However, due to the lack of standardization among hospital codes and meanings (and the potential for confusion and harm), some facilities have moved away from using emergency codes by color in favor of plain-language announcements.
In this guide, we'll examine the history of color-based emergency codes in hospitals, provide an overview of common alerts — such as code blue — and explore the lack of consistency in how these codes are defined and used by facilities. A broader perspective on this safety issue is critical, especially when onboarding new clinicians who may be used to different emergency alerts.
With a clearer understanding of the potential meaning of codes in hospitals nationwide, you’ll be better equipped to create an emergency response strategy that optimizes safety and preparedness for staff and patients alike.
History of Emergency Codes in Hospitals
Historically, the use of emergency codes in hospitals began as a way to streamline urgent communication and alert clinical employees without inciting stress or panic among patients and visitors. Specific terms like code blue gained popularity in hospitals in the 1990s, even gaining widespread awareness due to pop culture references through medical television dramas.
Due to its efficient messaging, the use of color-coded terms in healthcare facilities flourished, with each facility setting its own standards. This meant that there could be different emergency codes in hospitals, even within a single community — presenting confusion (for example, for staff who worked at multiple agencies).
In 1999, an incident occurred in California involving a man who entered a medical center with a gun. The incident was announced with an incorrect color code, drawing staff to the area of the gunman. The gunman opened fire, resulting in three staff deaths. Following this tragedy, the Hospital Association of Southern California (HASC) proposed that California hospitals should voluntarily implement standardized hospital emergency codes to mitigate confusion for staff.
Clarifying and Standardizing Hospital Codes to Protect Staff and Patients
HASC's initiative to standardize hospital emergency codes was the first in a series of at least 23 hospital associations recommending similar initiatives. In addition, the use of plain-language alerts entered the conversation, with the Federal Emergency Management Agency (FEMA) recommending this approach in a 2006 alert stating: "It is important that responders and incident managers use common terminology. There simply is little or no room for misunderstanding in an emergency situation."
By 2020, 13 states had recommended the use of standardized color-code alert systems, and Maryland mandated state-specific terminology. Many other state hospital associations advocated for plain-language alert systems.
Trend Toward Plain-Language Alerts
The trend away from emergency codes by color, and toward the use of plain language, has gained ground. Brigham and Women's Hospital in Boston, for example, transitioned away from color-coded alerts to plain-language alerts in 2013. Hospital leadership attributed their swift response to an active shooter event in 2015 to this innovation.
Under the previous system, the announcement would have gone out as a hospital emergency code gray, an often contested code with various meanings. With their new system in place, the event was conveyed in a straightforward announcement:
"A life-threatening situation now exists at Watkins Clinic B—Shapiro 2. All persons should immediately move away from that location if it is safe to do so. If it is not safe to move away, shelter in place immediately."
The use of clear language (rather than an alert cloaked as a gray code in hospital lingo) ensured that patients and visitors were also aware of the severity of the unfolding event. The hospital was cleared (people moved away from the incident or sheltered in place) within 16 minutes.
Potential Meanings of Different Emergency Hospital Codes by Color
The meaning of color codes varies from one hospital to another. While some color codes have common meanings (such as "code red" for fire), others differ widely between agencies. Because there is no official, authority-driven mandate, any standardization has been incidental, including the widespread use of fire-alert code red. Hospitals benefit from this unintentional uniformity, though. For example, a nurse that moves across state lines is unlikely to wonder, what does code red mean in a hospital at this location?
To combat potential confusion, many hospitals do issue employee badges with hospital emergency codes printed on the back. This allows staff to quickly reference a code and respond appropriately. Here are some potential meanings for the most common hospital color codes:
Hospital Emergency Code Red
The uniformity of this color-coded alert’s meaning is largely unique to the code red. Hospitals nationwide typically use it to indicate the following:
- Fire or smoke present
- Emergency situation involving fire
Hospital Emergency Code Blue
Hospital shows and television programming made this hospital color code a well-known phrase outside of clinical settings. It’s typically used to indicate the following:
- Adult medical emergency
- Medical emergency
- Patient in need of life-saving intervention
- Patient in cardiac or respiratory arrest
Hospital Emergency Code Orange
Hospitals tend to use this code to indicate an emergency that’s not clinical in origin. Depending on the facility, these may involve the following:
- Hazardous materials spill or release
- Hazardous materials present
- Bomb threat
- Emergency alert
- Internal or external emergency
Hospital Emergency Code Pink
For hospitals that cover maternal and/or pediatric services, this code is often used to indicate one (or more) of the following:
- Infant abduction
- Infant or child abduction
- Missing infant or child
- Medical emergency – pediatric
- Neonatal cardiac or respiratory arrest
Hospital Emergency Code Amber
Most hospitals use this code in alignment with the nationwide AMBER Alert program used to notify the public of a missing minor. In some facilities, it also extends to missing adults in addition to the following:
- Patient elopement
- Infant/child abduction
Hospital Emergency Code Green
Hospitals sometimes use this code to indicate an active emergency. However, the code green meaning in hospitals can vary widely from facility to facility. It typically covers the following:
- Patient elopement
- Emergency operations plan (EOP) activation
- Bomb threat
- Combative person
Hospital Emergency Code Yellow
Meanings for this code often parallel the warnings associated with other location’s use of code orange. Hospitals typically use a code yellow to indicate the following:
- Bomb threat
- Hazardous materials spill or release
Hospital Emergency Code Gray
This color-coded warning carries some of the most significant variance across separate hospital settings. Depending on the location, a hospital code gray could mean any of the following:
- Combative patient
- Need for security personnel
- Severe weather
- Patient elopement
- Active shooter/weapon present/hostage
- Patient showing signs/symptoms of a stroke
Hospital Emergency Code Silver
Hospitals tend to use this alert differently from many states, which issue silver alerts to indicate a missing, vulnerable elderly person. In clinical spaces, it may mean the following:
- Armed assailant
- Armed intruder
- Person with a weapon
- Active shooter
- Weapon/hostage situation
- Active threat
- Combative person
Hospital Emergency Code Black
A black code in hospital settings can sound ominous to patients and visitors. For staff, it’s likely to indicate one of the following:
- Severe weather event
- Bomb threat
- Active shooter
*There are no national or inter-agency standards for emergency codes. Meanings vary widely.
Potential Meaning of Other Hospital Emergency Codes
In addition to emergency hospital codes by color, there are also numeric codes or other coded terms. Hospitals may use these terms to indicate that a significant event is unfolding and requires a response from trained staff. Here's a breakdown of some of the common terms used, and the meaning that may be conveyed.
| Code 99 |
|
|---|---|
| Code Stroke |
|
| Code Stork |
|
| Code B |
|
| Code Triage |
|
*There are no national or inter-agency standards for emergency codes. Meanings vary widely.
Resources for Hospital Emergency Response Preparedness
In the event of an emergency, communication is crucial. Responsible parties must alert staff, patients, and visitors about the threat. Traditionally, this involved benign-sounding color-coded announcements, but thanks to an evolving body of research about communication best practices, this model is changing. Several state hospital associations have published plain- language implementation guides, including:
In addition to checking with state-level leaders in the healthcare industry, it may also help to look at federal emergency response management materials, such as National Incident Management System's (NIMS) tools and training resources. The Iroquois Health Association also has a helpful guide that outlines different emergency code systems in use by each state.
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