Haptoglobin
A haptoglobin test is most often used to diagnose hemolytic anemia, a disorder that happens when red blood cells are destroyed faster than they can be replaced.
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What this test measures
Haptoglobin is a protein manufactured by the liver whose job is to bind free hemoglobin in the bloodstream and escort it to the liver for disposal. Hemoglobin normally stays inside red blood cells, but when red blood cells break down (a process that occurs naturally at a low rate), some hemoglobin escapes into the blood. Haptoglobin latches onto that free hemoglobin and clears it before it can cause harm.
When red blood cells are being destroyed faster than normal, the volume of free hemoglobin in the blood surges. Haptoglobin binds to all of it, but the liver may not be able to replenish haptoglobin fast enough to keep up, causing blood haptoglobin levels to drop. A falling haptoglobin level is therefore one of the hallmark signs of hemolytic anemia (anemia caused by accelerated red blood cell destruction). Haptoglobin is also an acute-phase reactant, meaning its levels can rise during infection or inflammation independent of red blood cell status. This dual behavior makes the test useful for both investigating suspected hemolysis and evaluating inflammatory conditions.
Who should consider this test
You might consider this test if you are experiencing any of the following:
- Individuals experiencing symptoms of anemia such as fatigue, weakness, shortness of breath, or pale skin that may suggest their red blood cells are being destroyed faster than normal.
- Those who notice jaundice (a yellow tinge to the skin and whites of the eyes) or dark-colored urine, which can indicate excessive red blood cell breakdown.
- Patients with suspected liver disease, as haptoglobin is produced by the liver and levels may be affected by liver function problems.
- Individuals who have recently received blood transfusions, as this test may be done along with another test called direct anti-globulin to show if there has been a bad reaction to the transfusion.
- People being evaluated for inflammatory conditions, infections, or tissue damage, as haptoglobin levels can become elevated during these conditions as part of the body's acute-phase response.
What to expect
Preparation
No fasting or special preparation is required for this test. However, inform your healthcare provider about any medications you are taking, as some drugs may affect haptoglobin levels.
Sample Type
A healthcare professional will draw a blood sample from a vein in your arm using a small needle. The procedure typically takes just a few minutes.
Collection
The blood draw is performed at a lab location using standard venipuncture techniques. The sample is collected in a special tube and sent to the laboratory for analysis.
Turnaround
Results are typically available within 1-3 business days after the sample reaches the laboratory.
Understanding your results
Haptoglobin results are interpreted in context rather than in isolation. A low level may indicate accelerated red blood cell destruction, while an elevated level may reflect an inflammatory or infectious process. Healthcare providers evaluate haptoglobin alongside other markers of hemolysis (such as LDH, indirect bilirubin, and reticulocyte count), liver function, symptoms, and medical history to determine what is driving the result.
| Population | Reference Range | Notes |
|---|---|---|
| Adults | 41-165 mg/dL (410-1,650 mg/L) | Normal ranges may vary slightly between laboratories |
Reference ranges may vary by laboratory and individual factors. Results should be interpreted by a healthcare provider in the context of your overall health.
What does a “Low” result mean?
If your haptoglobin levels are too low, it may be a sign of a disorder of the red blood cells, such as anemia. If your levels are lower, it means you may have hemolytic anemia, in which your red blood cells are prematurely destroyed. An undetectable level is almost always due to hemolytic anemia. Haptoglobin can be low with liver disease, as the liver produces this protein. Low levels may also occur with certain medications, infectious mononucleosis, or genetic conditions affecting haptoglobin production.
What does a “High” result mean?
High haptoglobin levels may be a sign of an inflammatory disease. Inflammatory diseases are disorders of the immune system that can cause serious health problems. Increased haptoglobin levels are seen in conditions such as diseases associated with elevated erythrocyte sedimentation rate (acute-phase reactants) including rheumatic disease, myocardial infarction, infection, trauma, inflammation, hepatitis, amyloidosis, collagen diseases, or lymphoma and leukemia. Elevated levels may also occur with tissue destruction or malignancy. However, haptoglobin testing is not typically used as the primary method to diagnose or monitor these high-level conditions.
Privacy & confidentiality
Your haptoglobin test results are completely confidential and protected under HIPAA regulations. Results are not shared with insurance companies or added to your permanent medical records unless you choose to share them with your healthcare provider. No doctor visit is required to order this test.
Frequently asked questions
Related tests
Complete Blood Count (CBC)
Often ordered together to evaluate overall blood cell counts and characteristics when assessing anemia
View TestLiver Function Panel
Useful since haptoglobin is produced by the liver and levels can be affected by liver disease
View TestC-Reactive Protein (CRP)
Both are acute-phase reactants that can be elevated during inflammation and infection
View TestRelated conditions
Last reviewed: April 2026
CPT Code: 83010
This test may not be available in: NY, NJ, RI
This page is for informational purposes only and does not constitute medical advice. Always consult with a healthcare provider regarding any health concerns. LevelPanel does not diagnose, treat, or prescribe.
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LevelPanel has no business or affiliate relationship with Quest or LabCorp. These links are provided as a public service.
Lab testing services linked from this site are not available to residents of Alaska, Arizona, or Hawaii, unless otherwise noted on the lab's own website.
This publication is not intended to solicit the purchase of laboratory testing from any individual consumer.
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