Hemoglobin inferred from whole blood test (quantitative)
This test estimates your blood’s hemoglobin level, a protein that carries oxygen throughout your body. Hemoglobin levels help doctors assess whether you have enough red blood cells to stay healthy.
["Hemoglobin levels help check for anemia or other blood-related conditions."]
Key facts at a glance
- LOINC
- 92502-4
- Short code
- Hemoglobin S inferred Bld/T Ql
- Synonyms
- Hemoglobin S inferred Bld/T Ql
- Category
- hematology
- Sample
- whole-blood
- Container
- Lavender-top (EDTA)
- Units
- N/A
- Ref low
- 12
- Ref high
- 17.5
- Critical range
- 7 N/A – 20 N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- molgen
- CPT
- 85018
- SNOMED
- 900000000000003004
- Specimen volume
- 3 mL
- Stability
- Room temperature: 4h, Refrigerated: 24h
- Hemolysis max
- 0
- Lipemia max
- 0
- Icterus max
- 0
- TAT
- 4–24 hours
- Order
- routine
Why is this test done?
Your healthcare provider may order this test if you have symptoms like fatigue, pale skin, shortness of breath, or unexplained bruising. It’s also used during routine blood work, pregnancy monitoring, or before surgeries to ensure your blood is functioning properly.
What does the test involve?
A small blood sample is taken from a vein in your arm. The test measures certain properties of your blood to estimate hemoglobin indirectly, rather than measuring it directly in a lab. This method is often used quickly and conveniently.
How long does it take?
The blood draw takes about 5 minutes, and results may be available immediately or within a few hours, depending on the lab’s process. Follow-up testing may be needed if initial results are unclear.
What are the possible results?
Results are expressed as an estimated hemoglobin value, but exact numbers aren’t provided. Your doctor will interpret the results in relation to your symptoms and overall health.
Reference range
Adult males: 13.5-17.5 g/dL; Females: 12.0-16.0 g/dLN/A
No special preparation required. Stay well hydrated.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Clinical significance: Hemoglobin levels are critical for diagnosing conditions like anemia (low hemoglobin), polycythemia (high hemoglobin), or blood loss. Abnormal levels can indicate underlying health issues that need further investigation, such as bleeding disorders, chronic diseases, or nutritional deficiencies.
Short name
Hemoglobin (Hb) estimation
Frequently asked questions
What causes hemoglobin levels to change?
Do I need to prepare for this test?
Can I get false results?
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