Lab Report Decoder — Understand Any Blood Test Value Instantly

How to use the decoder

Grab your lab report from Quest, LabCorp, ARUP, or your hospital's patient portal (MyChart, MyQuest, or LabCorp Patient). Find the test you want to understand, then select the panel and parameter above and type in your number. The decoder shows where you fall on the normal range and explains what high or low values usually mean in US adults.

Remember

Your own report prints the exact reference range your lab used. If it differs slightly from ours, defer to your lab's range — methods vary between laboratories.

Medically reviewed by Dr. Elena Marsh, MD — Board-Certified Internal Medicine
Last reviewed: March 2026 · Reviewed for US reference ranges

Lab Report Decoder — FAQ

How does the Lab Report Decoder work?+

Choose your test panel, pick the specific parameter, enter your value and (where it matters) your sex, and the decoder compares your number to US reference ranges aligned with Quest Diagnostics and LabCorp. It tells you whether you're high, low, or normal, explains the most common causes, and flags when to follow up.

Is my data stored anywhere?+

No. The entire decoder runs in your browser using JavaScript. Your values are never sent to a server, stored, or shared. You can confirm this by disconnecting from the internet after the page loads — the tool still works.

Why might my result differ from my lab's range?+

Different labs use slightly different equipment and methods, so reference ranges vary a little. Your own report prints the exact range your lab used — always treat that as authoritative. Our ranges are typical US values for general guidance.