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Hospital emergency codes: what each one means

Last reviewed: August 28, 2026VerifiedSalud

In short

Act 170-2011 establishes the universal protocol codes for emergency response in public and private health facilities. The following codes are established for safety purposes: RED, initiated immediately upon real or suspected indication of fire, smoke, unusual heat from walls or doors, electronic fire alarm detection, activation of smoke detection systems or any indication of fire identified by the facility; GREY, upon real or suspected indication of an attempt against the institution’s security norms with or without weapons, disturbance, tumult, riot or any indication affecting security or breach of the peace; H2O, upon suspicion or real indication of flooding; BLUE, upon suspicion or real indication of a disaster inside or outside the institution, taking into account state and federal internal and external disaster management guidelines, the Hospital Emergency Incident Command System (HEICS) and OSHA; GREEN, upon the institution’s determination to activate the Rapid Response Team, medical personnel charged with reducing and preventing cardiorespiratory arrests, aimed at assisting patients with unstable and deteriorating clinical signs, and likewise upon suspicion or real indication of a heart attack or cardiac or respiratory failure; AMBER, upon the kidnapping of a child or infant; YELLOW, upon a hazardous substance spill; EVACUATION, upon the institution’s determination to activate evacuation, the area to be evacuated having to be indicated; BLACK, upon suspicion or real indication of a bomb, discovery of explosive material or of a suspicious package; and WHITE, upon the end of the emergency in accordance with the institution’s established plan. All public and private health facilities shall use those safety codes in their facilities.

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What is it?

It is why a “Code Grey” means the same thing in a hospital in Mayagüez as in one in Carolina. Before this Act each institution had its own vocabulary; Act 170-2011 fixed ten codes and required every health facility, public and private, to use them. If you hear one over a PA while accompanying a relative, this guide is the translation.

Who can do it?

The Act creates no procedure and asks nothing of you: it is a duty aimed at health facilities. Article 3 says it in one sentence: “It is established that all public and private health facilities shall use those safety codes in their facilities.” It applies equally to public and private hospitals.

Requirements

Information pending verification.

Documents you need

Information pending verification.

Cost

This procedure has no cost.

Step by step

  1. Step 1: Code RED — fire or smoke

    It is initiated immediately “upon real or suspected indication of fire, smoke, unusual heat from walls, doors, electronic fire alarm detection, activation of smoke detection systems or any indication of fire identified by the facility or institution.” Note the breadth: no one needs to see flames. An alarm going off is already a Code RED.

  2. Step 2: Code GREY — security, with or without weapons

    It is initiated immediately “upon real or suspected indication of an attempt against the institution’s security norms with or without weapons, disturbance, tumult, riot or any indication affecting security or breach of the peace identified or established by the facility or institution.” The phrase “with or without weapons” is the law’s: the code does not distinguish.

  3. Step 3: Code H2O — flooding

    The shortest of the ten: “Code H20 shall be initiated immediately upon suspicion or real indication of flooding.” The Act writes it that way, with the O of H2O printed as a zero in the compilation; we reproduce it and flag it rather than correcting the official text on our own.

  4. Step 4: Code BLUE — disaster, not cardiac arrest

    This is where most people go wrong, because in the United States “code blue” is used for cardiac arrest. Not in this Act. Code BLUE “shall be initiated immediately upon suspicion or real indication of a disaster inside or outside the institution, taking into account what is established by state and federal internal and/or external disaster management guidelines, the Hospital Emergency Incident Command System (HEICS) and the Occupational Safety and Health Administration (OSHA).” Cardiac arrest, in Puerto Rico, is Code GREEN.

  5. Step 5: Code GREEN — the Rapid Response Team and arrest

    The Act gives it two triggers, and the first is the one people do not expect. It is initiated “upon the institution’s determination to activate the ‘Rapid Response Team,’ medical personnel charged with reducing and preventing cardiorespiratory arrests. This is aimed at assisting patients with unstable and deteriorating clinical signs.” And it adds: “Likewise, it shall be initiated immediately upon suspicion or real indication of a heart attack or if found in cardiac or respiratory failure (cardiac or respiratory arrest) in accordance with established protocols.” That is, GREEN does not wait for the arrest: it also covers the patient who is deteriorating.

  6. Step 6: Code AMBER — kidnapping of a child or infant

    The Act defines it in one line: “Code AMBER shall be initiated immediately upon the kidnapping of a child or infant.” It is the hospital’s internal code and should not be confused with the statewide AMBER Alert, which is a different Act and a different agency: the public alert is operated by the Police. We have a separate guide for that.

  7. Step 7: Code YELLOW — hazardous substance spill

    It is initiated immediately “upon a hazardous substance spill in accordance with the guidelines established by the institution, local and federal laws, the Occupational Safety and Health Administration (OSHA) and other regulatory agencies.” Like BLUE, this code defers to external guidelines this Act does not reproduce and that we did not read.

  8. Step 8: Code EVACUATION and Code BLACK

    EVACUATION “shall be initiated immediately upon the institution’s determination to activate evacuation; once the code is activated the area to be evacuated must be indicated” — that is, the announcement must tell you which zone, not merely that there is an evacuation. BLACK “shall be initiated immediately upon suspicion or real indication of a bomb, discovery of explosive material, discovery of apparent explosive material, discovery of a suspicious package in accordance with the institution’s established plan.”

  9. Step 9: Code WHITE — the emergency is over

    The tenth closes the list: “Code WHITE shall be initiated immediately upon the end of the emergency in accordance with the institution’s established plan.” If you heard a code and then hear WHITE, that is the end of the event under that institution’s plan.

  10. Step 10: Who is bound, and who was to regulate it

    Article 3 binds “all public and private health facilities.” Article 4 gave the Health Department sixty (60) days from the Act’s implementation to adopt the codes and establish a regulation. Article 6 set a two-stage effective date: the Act took effect immediately only so that Health could adopt the regulation, and the rest sixty days after approval. The compilation we read does not say whether the regulation was adopted, and we do not assert it.

Where to do it

There is nothing to apply for: this Act imposes a duty on health facilities, not a procedure on the patient. The Health Department is the agency the Act charged with adopting the codes and their regulation. If what you need is what to do when an emergency room refuses to treat you, that is another guide; if you are looking for the public-school codes, Act 175-2026 created a parallel system modelled on this one.

How long it takes

Usually resolved on the spot.

What to do if something goes wrong

One textual detail we leave as it stands. In the official compilation the water code appears written “H2O” in the heading and “H20” — with a zero — in the sentence defining it. We reproduce both forms as they appear and do not fix the legal text on our own. What we did not read and therefore do not publish: the Health Department regulation Article 4 orders, the Hospital Emergency Incident Command System (HEICS) guidelines, the OSHA standards, the state and federal disaster management guidelines, and any particular hospital’s internal emergency plan — which several codes expressly defer to. That is why this guide does not publish what you should do on hearing each code: that lives in each institution’s plan, not in this Act. Cost is marked free because there is no procedure and no payment; time is marked immediate because the Act itself says of every code that it “shall be initiated immediately.”

Common mistakes

  • Reading “Code BLUE” as cardiac arrest: in this Act BLUE is a disaster and cardiorespiratory arrest is Code GREEN.
  • Thinking the hospital’s Code AMBER is the statewide AMBER Alert: the hospital’s is internal, for the kidnapping of a child or infant.
  • Believing it applies only to public hospitals: Article 3 binds all public and private health facilities.
  • Expecting Code GREEN to mean an arrest already happened: it is also activated by the Rapid Response Team for a deteriorating patient.
  • Assuming the evacuation announcement does not say where: the Act requires the area to be evacuated to be indicated.
  • Looking in this Act for what a visitor should do: the Act fixes the codes, not the instructions to the public, which live in each institution’s plan.

Frequently asked questions

What does Code Blue mean in a Puerto Rico hospital?

A disaster inside or outside the institution. Act 170-2011 does not use BLUE for cardiac arrest: Code GREEN covers that.

What does Code Grey mean?

A real or suspected indication of an attempt against the institution’s security norms, with or without weapons, disturbance, tumult, riot or any breach of the peace identified by the facility.

Do these codes apply in private hospitals?

Yes. Article 3 provides that all public and private health facilities shall use those safety codes in their facilities.

How many codes are there?

Ten: RED, GREY, H2O, BLUE, GREEN, AMBER, YELLOW, EVACUATION, BLACK and WHITE. WHITE is the one announcing the emergency is over.

Official sources

These are the government pages this guide is based on.

Last verified

August 28, 2026

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