Orbitally measured hemoglobin concentration in whole blood (autoanalyzer method)
This test measures the amount of hemoglobin (the protein in red blood cells that carries oxygen) in your blood using an automated analyzer.
["Hemoglobin levels help assess your blood’s ability to carry oxygen and detect conditions like anemia or polycythemia."]
Key facts at a glance
- LOINC
- 76069-4
- Short code
- %HYPO/RBC NFr Bld Auto
- Synonyms
- %HYPO/RBC NFr Bld Auto
- Category
- chemistry
- Sample
- whole-blood
- Container
- Lavender-top (EDTA)
- Units
- N/A
- Ref low
- 4.2
- Ref high
- 5.9
- Critical range
- 2 N/A – 7 N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- automated-count
- CPT
- 85041
- SNOMED
- 900000000000003001
- 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
What This Test Measures
Hemoglobin is the key protein in red blood cells responsible for transporting oxygen from your lungs to the rest of your body. This test quantifies its concentration in your blood, which can indicate whether your blood is carrying enough oxygen or if there may be an underlying issue like anemia (low levels) or polycythemia (high levels).
Why It’s Done
Doctors may order this test to diagnose or monitor conditions such as anemia, blood loss, or other blood-related disorders. It’s also used in routine check-ups, during pregnancy, or when evaluating symptoms like fatigue, shortness of breath, or pale skin.
Sample Collection and Preparation
A small amount of blood is drawn from a vein in your arm. The blood is then processed and analyzed automatically to measure hemoglobin levels. No special preparation is needed, but fasting may not be required unless instructed by your healthcare provider.
What to Expect
The blood draw is quick and typically painless. You may feel a slight pinch, but most people tolerate it well. Afterward, you can resume normal activities immediately. If you experience any unusual bruising or discomfort, contact your healthcare provider.
Reference range
Adult males: 4.2-5.9; Females: 3.8-5.1 x 10^12/LN/A
No special preparation required. Stay well hydrated.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
◆Associated findings1
Frequently asked questions
Hemoglobin levels can provide critical insights into overall health. Low levels may signal anemia, chronic illness, or blood loss, while high levels could indicate conditions like polycythemia or dehydration. Regular monitoring helps manage these conditions effectively.
How often should I expect to have this test?
What do my results mean?
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 17, 2026. · Read our editorial policy