Glossary term
Abnormal (on a test report)
Also known as: abnormal, abnormal result, flagged abnormal
Part of: How to read a report
- Reading time
- 3 min read
- Last reviewed
- Last reviewed January 1970
- Reading level
- Written in plain English
- Reviewed by
- Reviewed by Medipher Editorial Team
A flag meaning a result differs from what the laboratory or test expected — not a statement about your health.
Medipher explains medical wording in plain English — it does not diagnose or replace a clinician. If this is a medical emergency, call your local emergency number immediately.
What is this?
On a laboratory report, abnormal usually means a value fell outside the reference range, or a finding differed from what the test expected to see.
The flag is generated automatically. It tells a clinician where to look; it does not tell them, or you, what is happening.
The same word appears in other settings — imaging reports and screening letters, for example — where it again means further consideration rather than a confirmed problem.
Why is it important?
The word sounds alarming, but it describes the measurement, not a conclusion about you.
Where you'll see it: Laboratory reports, imaging reports, screening letters and online record summaries.
Does an abnormal result always mean something is wrong?
Not necessarily. A number that sits outside the printed range is a prompt for interpretation — not a diagnosis.
- A single result rarely gives the full picture — clinicians interpret it alongside your symptoms.
- Your medical history, medications and other blood tests all shape the meaning of one value.
- Small movements just outside the reference range are common and often not concerning.
- Repeat testing over time is frequently more useful than any single number.
What might happen next?
- Read the result next to the range and units on your own report.
- Ask what the flag means for you specifically, and whether a repeat is needed.
- Seek medical help promptly if you are unwell rather than waiting for an explanation.
One result rarely tells the whole story. Clinicians look at your symptoms, medical history, medications and other tests together — and a single value that sits slightly outside the reference range is often normal for you. Repeat testing over time is frequently more useful than any one number. Medipher helps you understand what a result means in plain English, but it cannot diagnose medical conditions or replace advice from a doctor, nurse or pharmacist.
When should I speak to a healthcare professional?
Speak with your GP or another healthcare professional if:
- You've been asked to repeat the test.
- You're experiencing new or worsening symptoms.
- Your clinician has flagged the result as needing follow-up.
- You don't understand your results or feel unsure what to do next.
If you have severe symptoms — chest pain, severe breathlessness, fainting, heavy bleeding or feel very unwell — seek urgent help. If this is a medical emergency, call your local emergency number immediately. Medipher is designed to help explain medical information and is not an emergency service.
Frequently asked questions
Related blood tests
Terms clinicians often look at alongside Abnormal (on a test report).
- Out of rangeA result that falls above or below the reference range printed by the laboratory for that test.
- Reference rangeThe band of values a laboratory expects to see in most healthy people tested in the same way.
- EquivocalA result sitting in a borderline zone where the test cannot give a clear positive or negative answer.
Related guides
Learning collections
Follow a guided pathway that puts Abnormal (on a test report) in context, step by step.
Still unsure what your result means?
This page explains one medical term. If you have a blood test, GP letter or hospital report, Medipher can explain your entire document in plain English.
- what your results mean
- unfamiliar medical terminology
- what your clinician may be monitoring
- useful questions to ask at your next appointment
Sources
General patient information referenced when writing this page.
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About this page
- Author
- Omer Suliman
- Medical reviewer
- Clinical review pending
- Last reviewed
- January 1970
- Last updated
- January 1970
Evidence. Written from public patient-information sources including the NHS, NICE and the Association for Laboratory Medicine, and reviewed for plain-English accuracy before publication.
Educational content only. Medipher explains medical language in plain English. It does not diagnose, and it is not a substitute for advice from a doctor, nurse or pharmacist. Read the medical disclaimer.
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A short summary and recommended next reads are just below.
Continue learning
- Next upOut of rangeA result that falls above or below the reference range printed by the laboratory for that test.
- Next upReference rangeThe band of values a laboratory expects to see in most healthy people tested in the same way.
- Next upEquivocalA result sitting in a borderline zone where the test cannot give a clear positive or negative answer.
This glossary entry is general health information, not medical advice. Medipher explains medical wording in plain English and does not diagnose, provide treatment advice, or replace a GP, doctor, nurse or pharmacist. Always discuss your results with a qualified clinician.