Hemoglobin (Mass Concentration) in Whole Blood
This test measures the amount of hemoglobin, the protein in red blood cells that carries oxygen throughout your body.
["Hemoglobin helps determine if you have healthy red blood cells and whether you may need treatment for anemia or other blood-related conditions."]
Key facts at a glance
- LOINC
- 4606-0
- Short code
- Hgb M-Boston Bld Ql
- Synonyms
- Hgb M-Boston Bld 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
- 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
What Is Hemoglobin Used For?
Hemoglobin levels are commonly checked to diagnose or monitor conditions like anemia, which occurs when your body doesn’t have enough healthy red blood cells. It can also help identify issues with blood production, chronic diseases, or blood loss. Your doctor may order this test during routine check-ups, before surgeries, or if you experience symptoms like fatigue, pale skin, or shortness of breath.
How Is the Test Performed?
A small blood sample is taken from a vein, usually in your arm. The sample is then sent to a lab where it is analyzed to measure hemoglobin concentration. This process is quick and typically done in a doctor’s office or clinic.
What Might Affect Your Results?
Several factors can influence hemoglobin levels, including recent blood loss, iron deficiency, pregnancy, certain medications, or chronic illnesses like kidney disease or liver problems. Smoking or alcohol use may also impact results.
Common Reasons for Testing
Your doctor might recommend this test if you have symptoms like extreme tiredness, weakness, pale or yellowish skin, rapid heartbeat, or dizziness. It’s also used to screen for anemia in children, pregnant women, or individuals with risk factors like poor diet or frequent blood donations.
Reference range
Adult males: 13.5-17.5 g/dL; Females: 12.0-16.0 g/dLN/A
No special preparation usually required. Stay well hydrated. Inform your healthcare provider of all medications and supplements you are taking.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
◆Associated findings1
Short name
Hemoglobin (Hgb)
Frequently asked questions
Why is this test important in diagnosing health conditions?
What are the typical reference ranges for adults?
Can lifestyle changes impact hemoglobin levels?
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