A code brown hospital alert has no single worldwide meaning. In Canadian hospitals it usually signals a hazardous spill inside the building. Australian hospitals use it for an external emergency that sends a patient surge, while several U.S. hospitals use it for a missing adult.
The color tells you that something is wrong, but only the local emergency plan tells you what. Instructions from staff at that facility always come first.
What Is Code Brown in a Hospital?
Code Brown is a hospital emergency code announced over the public address or overhead paging system. The announcement usually adds a location, such as a ward number or a floor, so the right response team can move straight to the problem. Some staff refer to it as a brown alert when talking among themselves.
Hospitals use short color codes for a practical reason. A trained nurse understands the alert instantly, while patients nearby are spared a detailed message that could cause panic. The trade-off is that a visitor hearing the same words learns almost nothing.
No international body owns the hospital codes list, so each country, province, state or health system assigns its own meanings. Two hospitals in the same city can therefore use Code Brown for completely different events.
Code Brown Hospital Meaning by Country
The table below shows the definition published by health authorities in each region, with Code Orange added because the two are so often confused.
| Region | Code Brown | Code Orange | Source |
| Australia (AS 4083) | External emergency, mass casualty event | Evacuation | WA Health, NSW Health |
| Alberta | Chemical spill or hazardous substance release | Mass casualty incident | Alberta Health Services |
| British Columbia | Hazardous spill | Disaster or mass casualties | BC Ministry of Health |
| Manitoba | Chemical spill | External disaster | Northern Health Region |
| Ontario | Chemical spill, leak, or catastrophic flood | Mass casualty incident | William Osler Health System |
| Quebec | Code brun: hazardous materials | Code orange: mass arrival of patients | CIUSSS Centre-Sud |
| United States | Missing adult patient at several hospitals | Often hazardous material | Individual hospital plans |
In Australia the meaning comes from a national standard, AS 4083-2010, Planning for Emergencies in Health Care Facilities. WA Health lists Code Brown as an external emergency under that standard. A NSW Health emergency policy uses the same wording, adding mass casualty events to the definition.
Canadian provinces set their own lists, though most land on a spill. The BC Ministry of Health standardized hospital colour codes across the province in 2011, with Code Brown assigned to a hazardous spill. In Quebec, the CIUSSS du Centre-Sud-de-l’Ile-de-Montreal describes code brun as a spill of hazardous materials that may affect occupants. Health authorities in Nova Scotia, Saskatchewan, and Yukon publish their own colour code lists, so check the local version there too.
Code Brown Meaning: Hospital Policy Decides
The United States has no national hospital color code system. State hospital associations publish voluntary standards, yet individual hospitals still choose their own colors. That is why the hospital code brown meaning in Ohio can differ from the one used two states away.
Two well-known code sets leave Code Brown out entirely. The Hospital Association of Southern California guide assigns no meaning to it. Maryland’s uniform emergency code regulation lists twelve required codes, none of them brown.
Among staff, the phrase also circulates as informal slang for a patient’s bowel accident. No official code list defines it that way, so it should never be confused with a real overhead alert.
Code Brown as a Hazardous Spill
This is the most common meaning in Canada, where Alberta Health Services activates Code Brown when a chemical spill or hazardous substance release has occurred. A policy from Thunder Bay Regional Health Sciences Centre in Ontario applies it to any incident involving a potential or definite hazardous substance.
The substance does not have to be exotic, as the typical triggers in hospital policies show:
● Chemical or pharmaceutical spills, such as a broken bottle of cleaning concentrate or chemotherapy drug
● Gas, vapor or fumes from an unknown source
● Radioactive material from nuclear medicine
● Biohazard material, such as infectious waste, that needs special containment
● A catastrophic flood, which at least one Ontario hospital system includes under Code Brown
● Any spill of an unknown substance
The hazard matters more than the volume, since a little toxic chemical in a closed room is riskier than a large spill of water. Most policies call a Code Brown once a release cannot be contained safely by the person who found it.
What Staff Do During a Code Brown Spill
Each facility writes its own Code Brown protocol, though the order of steps is broadly similar across Canadian hospitals.
1. Move people away from the area, closing doors where possible to limit the spread of fumes.
2. Call the switchboard with the exact room number, naming the substance as well if you know what spilled.
3. Check the safety data sheet for the product, which lists hazards, protective equipment, first aid, as well as cleanup steps.
4. Leave containment to the emergency response team, trained staff wearing the right personal protective equipment with a matched spill kit.
5. Escalate to facilities management, environmental services, infection control, a HAZMAT response team, or the fire service when the spill exceeds local capacity.
6. Complete the incident report once the incident commander declares all clear.
Federal Rules Behind the Spill Response
In the United States, OSHA requires employers to keep a safety data sheet for every hazardous chemical on site. Under the Hazard Communication Standard, those sheets must be readily accessible to employees during each work shift.
Hospitals that receive contaminated patients from outside face stricter rules. OSHA’s guidance for hospital-based first receivers divides the hospital into a decontamination zone, where the hazard is unknown, as well as a clean post-decontamination zone.
Staff in the decontamination zone wear a powered air-purifying respirator with a chemical-resistant suit. Double gloves and chemical-protective boots complete the protective kit for that zone. Anyone with a role on the decontamination team needs First Responder Operations Level training, while emergency department clerks need Awareness Level training at minimum.
Code Brown as an External Emergency
In Australia, Code Brown has nothing to do with a spill inside the building. It tells the hospital to prepare for patients from an outside incident, such as a highway crash, an industrial fire, or a natural disaster like a flood.
The trigger is usually demand that outstrips the hospital’s normal capacity. A hospital may declare Code Brown when the number of arriving patients, the type of injuries, or the pressure on intensive care beds goes beyond normal operations.
Once activated, resource allocation shifts to the hospital incident management team, which typically takes these steps:
● Opens an emergency operations center to run the disaster response
● Counts free beds, operating theaters, and staff on call
● Coordinates with ambulance services, using mutual aid agreements with nearby hospitals
● Sets up triage at the emergency department entrance
● Tracks every incoming patient, arranging transfers when one site fills up
● Scales the response up or down as demand changes
● Declares the event over once normal operations can safely resume
The underlying event never enters the hospital, yet it can still shut elective surgery for a day. Patients already admitted may see their procedures postponed while the emergency department absorbs the surge.
Code Brown as a Missing Adult Patient
Several U.S. hospitals use Code Brown when an adult patient is missing. Cleveland Clinic lists Code Brown as a missing adult on its main campus. Its instructions tell staff to alert the proper authorities immediately but not to give the operator the patient’s name.
The same meaning appears at Soin Medical Center in Ohio, where Code Orange covers hazardous material instead. The University of Toledo Medical Center uses Code Brown for an admitted adult who has left a treatment area, putting their own health at risk.
The patients involved are often vulnerable, for example, a person with dementia, someone recovering from anesthesia, or a patient at risk of self-harm. Staff typically secure the exits before searching assigned zones. Security or police are called if the patient is not found quickly.
Some hospitals use the color locally without any statewide backing. The Kentucky Hospital Association cites Code Brown for a missing adult at a geriatric center as an example of a hospital-specific code.
What Does Code Brown Mean in the Hospital for Visitors?
For a visitor, the safe response is the same whichever meaning applies. Listen for the location, move away from it, and follow what staff tells you.
● Never touch, mop, or step through a spilled substance
● Leave any area with an unusual smell, smoke, or tape across the doorway
● Stay in your room or waiting area unless staff ask you to move
● Keep doors clear during a missing patient search
● Tell a nurse straight away if you think you were exposed to a chemical
During an external emergency, expect closed entrances, rerouted ambulances, or tighter visiting rules. These changes protect the emergency department, so they may last several hours.
Guidance for Staff
Staff should follow the emergency code policy of their current facility rather than a definition learned elsewhere. Agency nurses or travelling clinicians moving between provinces or states are most at risk of applying the wrong meaning. The emergency operations plan sets out each role, from the person running the command post to the one who speaks with families.
Emergency Hospital Codes by Color
The chart below is a quick orientation to hospital color codes, not a universal dictionary. Meanings shift between countries, provinces, states, even individual hospitals. For a fuller list, see the 360alert guide to hospital emergency codes.
| Code | Common meaning in at least some hospitals |
| Code Red | Fire, or in some systems a major bleeding alert |
| Code Blue | Cardiac arrest or another life-threatening medical emergency |
| Code Pink | Infant abduction, or a pediatric medical emergency in some systems |
| Code Orange | Hazardous material, evacuation, or mass casualty event, depending on location |
| Code Amber or Adam | Missing or abducted child |
| Code Yellow | Missing patient, internal emergency, or disaster, depending on location |
| Code Green | Evacuation in some systems, combative person in others |
| Code Purple | Hostage situation, bomb threat, or child abduction |
| Code White | Violent or aggressive person |
| Code Grey | Combative person, severe weather, or infrastructure failure |
| Code Silver | Person with a weapon or active attacker |
| Code Black | Bomb threat or personal threat |
| MET call | Medical emergency team call for a deteriorating patient in Australian hospitals |
Several of these codes have their own guides on this site, including Code Blue, Code Orange, Code Silver, as well as Code Black.
Code Brown vs Code Orange
These two colors swap roles depending on where you are, which is why they cause so much confusion. In British Columbia, Brown is a hazardous spill while Orange is a mass casualty event. In Australia, Brown covers the external emergency, leaving Orange for evacuation. At some Ohio hospitals, Orange means hazardous material, with Brown reserved for a missing adult.
A nurse who trained in Vancouver might hear Code Orange in Ohio and head toward the emergency department instead of a chemical spill. Mismatches like this are the main argument for plain-language alerts.
Why Hospital Color Codes Differ
Hospital codes grew up locally, decades before anyone tried to standardize them. Each facility picked colors that made sense to its own staff, so the same color took on different meanings across a single region.
The cost of that confusion became clear in 1999. According to the Pennsylvania Patient Safety Authority, staff at West Anaheim Medical Center responded to a combative-person code without knowing the man was armed. The mistake cost three employees their lives when he opened fire.
The Hospital Association of Southern California formed a safety committee that December. It adopted standardized code names in July 2000, a set many other states later copied. Maryland went further, writing uniform codes into state regulation for every acute care hospital.
The Pennsylvania advisory found that more than 25 state hospital associations had recommended voluntary standard codes by 2015. Six of them had already moved toward plain language: Colorado, Florida, Iowa, Minnesota, Missouri and Wisconsin.
The Shift to Plain Language
Washington State took the most recent step toward replacing color codes. The Washington State Hospital Association led a statewide move to plain-language alerts, with hospitals switching over on October 1, 2024.
Only two legacy codes survived: Code Blue for cardiac or respiratory arrest, as well as the national AMBER Alert for a missing child. Every other announcement now follows a fixed pattern of alert type, event, location and instructions. A spill might be called as a facility alert for a hazardous spill in the second-floor laboratory.
Plain language improves crisis communication by removing most of the guesswork for visitors, agency staff, or emergency crews arriving from outside. It does not mean every hospital has dropped Code Brown, so the local policy remains the final word.
Code Brown Protocol: Activation, Response, Stand-Down
Whatever the meaning, a complete Code Brown emergency procedure moves through three stages.
7. Activation. Code Brown activation begins when a trained staff member sees that the local threshold has been reached. Reporting the event through the switchboard starts the notification chain.
8. Response. The incident commander assigns roles under the Incident Command System. Access is controlled while specialist help is called in, with evacuation as the next step if conditions worsen.
9. Stand-down. Command confirms the hazard or surge is under control before announcing all clear. Services resume once the event is documented, with a debrief held soon after.
Training, Drills, Debriefs
U.S. hospitals that take Medicare or Medicaid must test their emergency plan twice a year under the emergency preparedness rule at 42 CFR 482.15. The Centers for Medicare & Medicaid Services enforces that rule, while accreditors such as the Joint Commission review emergency management during surveys.
Good Code Brown training covers six areas:
● The local meaning of the code
● The notification route through the switchboard
● Protective equipment for spill response
● Patient movement during a surge or evacuation
● Incident command roles
● Documentation after the event
Emergency code training works best when staff practice it regularly. Tabletop exercises suit the external emergency version, while a disaster drill or spill drill suits the hazardous material version.
After a real activation, leaders should review what happened and support affected staff. The plan is then updated, with the changes practiced before the next event.
Conclusion
A code brown hospital announcement can mean a chemical spill, a surge of patients from an outside disaster, or a missing adult. The meaning depends entirely on where the code is called, which is why the local code list matters so much.
Visitors stay safe by moving away from the announced location and following staff directions. Staff stay effective by learning the code list of the facility they are working in today, not the one they trained at years ago.
This article provides general information about hospital emergency codes. Emergency code meanings vary by facility, so always follow the instructions given by hospital staff.
Frequently Asked Questions
It is an overhead emergency alert whose meaning depends on the facility. Canadian hospitals mostly use it for a hazardous spill, Australian hospitals for an external emergency, with several U.S. hospitals using it for a missing adult patient.
There is no national definition, so hospitals choose their own. Cleveland Clinic uses it for a missing adult patient. The standard code sets in California or Maryland leave it out, treating a hazardous material spill as Code Orange instead.
Staff should apply the definition in their own facility’s emergency code policy. That policy assigns each person a role, whether securing exits, containing a spill, or preparing beds for incoming patients.
Most provinces use it for a chemical spill or hazardous substance release. British Columbia, Alberta, Manitoba, Ontario, as well as Quebec, all publish variations of this meaning.
Training usually starts with the code list and a review of safety data sheets. Protective equipment fitting comes next, followed by spill or surge drills. Staff on decontamination teams need additional OSHA-level training in the United States.
Visitors should not leave unless staff asks them to. Move away from the announced location and keep exits clear, since staff will tell you if you need to go anywhere else. Leaving the building on your own can block a perimeter during a missing patient search.
No. Emergency codes vary by country, province, state, even between hospitals in the same city. Always check the local code list, usually printed on staff badge cards or posted near nursing stations.
The answer depends on which country or province you are in. In British Columbia, Brown is a hazardous spill, and Orange is used for mass casualties. In Australia, Brown is an external emergency, while Orange means evacuation.
References
1. WA Health. Preparing and Managing Hospitals for a Disaster or Emergency, reviewed March 21, 2022. https://www.health.wa.gov.au/Articles/N_R/Preparing-and-managing-hospitals-for-a-disaster-or-emergency
2. NSW Health, South Eastern Sydney Local Health District. Emergency Management Policy SESLHDPD/265, April 2023. https://www.seslhd.health.nsw.gov.au/sites/default/files/documents/SESLHDPD%20265%20-%20Emergency%20Management.pdf
3. Alberta Health Services. Emergency Response Codes and Actions, September 2018. https://www.albertahealthservices.ca/assets/info/volunteers/ul/if-volunteers-emergency-response-codes.pdf
4. BC Ministry of Health. Standardized Hospital Colour Codes, effective February 1, 2011. https://www2.gov.bc.ca/assets/gov/health/keeping-bc-healthy-safe/health-emergency-response/standardized-hospital-colour-codes.pdf
5. Northern Health Region, Manitoba. Emergency Codes and Contingency Response Plan AD-03-30, May 2018. https://internal.northernhealthregion.com/wp-content/uploads/2019/03/AD-03-30-Emergency-Codes-and-Contingency-Response-Plan.pdf
6. William Osler Health System. Emergency Codes. https://williamoslerhs.ca/en/visiting-us/emergency-codes.aspx
7. Thunder Bay Regional Health Sciences Centre. Code Brown Policy EMER-100, October 2021. https://comms.tbrhsc.net/wp-content/uploads/2022/04/EMER-100-Code-Brown-2021-Update.pdf
8. CIUSSS du Centre-Sud-de-l’Ile-de-Montreal. Introduction aux mesures d’urgence. https://ciusss-centresudmtl.gouv.qc.ca/sites/ciussscsmtl/files/media/document/IntroductionMesuresUrgencesJourneedAccueil.pdf
9. Cleveland Clinic Main Campus. Emergency Situation Codes, Appendix A, May 2021. https://my.clevelandclinic.org/-/scassets/files/org/supply-chain/non-employee-onboarding/appendix-a-cleveland-clinic-main-campus-emergency-situation-codes.pdf?la=en
10. Kettering Health, Soin Medical Center. Emergency Preparedness Plan. https://access.ketteringhealth.org/central-credentialing/pdfsoin/EmergencyPrepPlan.pdf
11. University of Toledo Medical Center. Emergency Codes Simplified. https://www.utoledo.edu/depts/safety/docs/Hospital_EP/Emergency%20Codes%20Simplified.pd
