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Haptoglobin in Serum (Quantitative)

Published: August 9, 2026Updated: August 16, 2026

Haptoglobin is a protein in your blood that helps protect red blood cells from damage and prevents excessive bleeding. Your doctor may order this test to check for conditions that affect red blood cell health or blood clotting.

Quick summary

["This test helps assess red blood cell stability and potential bleeding risks."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
97523-5
Short code
HAV RNA Spec Ql NAA+probe
Synonyms
HAV RNA Spec Ql NAA+probe
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
probe-amp-tar
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

Why This Test Is Done

Doctors may order a haptoglobin test to evaluate symptoms like anemia, unexplained bruising, or bleeding disorders. It can also be used to monitor conditions like hemolytic anemia (where red blood cells break apart) or certain infections or cancers that affect blood components.

What to Expect Before the Test

No special preparation is needed. You may have a small needle inserted into your arm to draw blood from a vein. If you’re on blood thinners, let your doctor know before the test.

What the Results Mean

Lower than expected haptoglobin levels may suggest red blood cell destruction (hemolysis), while very low levels could indicate severe bleeding or other blood disorders. Results alone aren’t diagnostic; they’re usually reviewed with other test results and symptoms.

Common Conditions Linked to Haptoglobin Levels

Abnormally low haptoglobin is often seen in hemolytic anemia, liver disease, or severe infections. Very high levels may rarely occur in conditions like acute inflammation or certain blood cancers.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Haptoglobin is a marker for red blood cell integrity and can help diagnose or monitor conditions affecting blood health, such as hemolysis or bleeding disorders. It’s not a standalone test but part of a broader evaluation when symptoms suggest blood-related issues.

Short name

Haptoglobin Level

Frequently asked questions

What causes haptoglobin levels to be low?
Low haptoglobin can result from conditions like hemolytic anemia (where red blood cells break down), liver disease, severe infections, or certain cancers. It may also appear after blood transfusions or trauma.
What does it mean if my haptoglobin is high?
Elevated haptoglobin is less common but can occur in acute inflammation, severe infections, or rare blood disorders. It’s usually not a standalone concern unless combined with other symptoms or test results.
Can diet affect haptoglobin levels?
Dietary factors typically don’t significantly impact haptoglobin levels. However, certain medications (like blood thinners) or medical conditions may influence results, so always discuss your medications and health history with your doctor.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy