Hemoglobin S Polymerization (Serum/Plasma)
This test measures the presence of abnormal hemoglobin S polymers in your blood, which can indicate conditions like sickle cell disease or other hemoglobinopathies.
["This test helps assess red blood cell stability and potential risks of sickling in your blood."]
Key facts at a glance
- LOINC
- 14565-6
- Short code
- Hgb sp3 Stl gastro Ql
- Synonyms
- Hgb sp3 Stl gastro Ql
- Category
- hematology
- Sample
- stool
- Container
- Clean container
- Units
- N/A
- Ref low
- 10
- Ref high
- 40
- Critical range
- 7 N/A – 20 N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- CPT
- 84484
- SNOMED
- 302774002
- Specimen volume
- 5 g
- Stability
- Refrigerated: 24h, Frozen: 7d
- TAT
- 4–24 hours
- Order
- routine
Your doctor may order this test to help evaluate your overall health, screen for certain medical conditions, or monitor a diagnosis you already have. The results provide important information that helps guide decisions about your treatment plan and any follow-up care you may need.
Your healthcare provider may order this test if you have a family history of sickle cell disease, experience symptoms like pain, fatigue, or unusual blood test results, or if you’re being evaluated for conditions affecting hemoglobin structure.
Your test results show the level or value that was measured in your sample. A result within the expected range usually suggests normal function, while a value that is too high or too low may point to a condition that needs further evaluation and interpretation by your healthcare provider.
Higher-than-normal levels may suggest abnormal hemoglobin polymerization, which can lead to sickling of red blood cells and related complications. Results are interpreted by a healthcare professional based on your clinical picture.
A trained healthcare professional will collect your sample, usually from a vein in your arm, using a small needle. Most patients do not need special preparation, but you should follow any specific instructions from your doctor, such as avoiding certain foods, drinks, or medications before the test.
Blood is drawn from a vein, typically in the arm. The sample is processed into serum or plasma for analysis. This test does not require fasting.
Abnormal results can have many different causes, including infection, inflammation, chronic illness, dehydration, recent intense exercise, certain medications, or problems with organs such as the liver, kidneys, or thyroid. Your doctor will review your complete medical history before drawing any conclusions.
Elevated levels are most commonly associated with sickle cell trait or disease, but other conditions or medications (e.g., certain drugs that alter hemoglobin) may also affect results.
Reference range
Adult: 10-40 U/LN/A
No special preparation required. Avoid fatty meals before the test if possible.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Clinical Significance
Short name
Hemoglobin SPolymerization
Frequently asked questions
Hemoglobin S polymerization is clinically significant because abnormal hemoglobin can cause red blood cells to become rigid and sickle-shaped, leading to blockages in blood vessels, pain crises, infections, and organ damage. Regular monitoring helps manage symptoms and prevent complications.
There is no single reference range provided here because levels vary based on individual health, disease state, and testing methodology. Your results will be reviewed by a healthcare provider in the context of your overall health.
No, fasting is not required for this test.
Sources
- 1
- 2Lab Tests OnlineSource
- 3
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.
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