What should you do if you encounter a 400-series code you do not recognize on a call?

• A. Proceed with the call using your best guess.
• B. Stop and verify the code with dispatch or a supervisor before proceeding.
• C. Document it and seek clarification later.
• D. Ignore and continue.

Answer: (B)

When you run into an unfamiliar 400-series code on a call, you should pause and verify its meaning with dispatch or a supervisor before proceeding. These codes can be agency-specific or have nuanced meanings that affect what resources you deploy, how you approach the scene, and what safety steps are required. Getting a quick confirmation ensures you respond correctly, avoid misinterpretation, and keep the operation efficient and safe. Dispatch can provide the exact definition and any special instructions, and a supervisor can authorize the proper on-scene actions if needed.

Proceeding with a guess can lead to applying the wrong response, wasting resources, or creating unnecessary risk. Delaying everything to document and seek clarification later jeopardizes safety and may violate procedures. Ignoring the code and continuing is unsafe and could escalate the situation or result in improper handling.