Lab report abnormality checker
Every lab report lists a result next to a reference range. When a value falls outside that range, it is flagged for your doctor to review. Here is how to read those flags in plain language.
How reference ranges work
A reference range is the band of values seen in most healthy people for a given test. A result below the low end or above the high end is marked as abnormal. An out-of-range value is not a diagnosis on its own — it is a prompt to look closer, often alongside your history, symptoms, and other results. Ranges differ between labs, ages, and sexes, so always read the range printed on your own report.
Illustrative examples
These examples show how an out-of-range flag looks. The ranges below are for illustration only and are not authoritative medical thresholds — use the range on your own report.
- 9.5 g/dL · Below range
Hemoglobin
Example range 12–15 g/dL
Sits below the example range — often discussed in the context of anaemia.
- 98 mg/dL · Within range
Fasting glucose
Example range 70–100 mg/dL
Falls inside the example range in this illustration.
- 6.8 mIU/L · Above range
TSH
Example range 0.4–4.0 mIU/L
Above the example range — a value your doctor may want to review.
Tier 1 AI models are reviewed against standard clinical thresholds.
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