Hemoglobin Substance Concentration in Whole Blood (Qualitative or Quantitative Screening)
This test measures the amount of hemoglobin, the protein in red blood cells that carries oxygen throughout your body. It helps assess whether your blood has enough healthy red cells.
["Helps diagnose or monitor conditions affecting red blood cell production or function."]
Key facts at a glance
- LOINC
- 59260-0
- Short code
- Hgb Bld-sCnc
- Synonyms
- Hgb Bld-sCnc
- 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
Why It’s Done
Doctors may order this test to check for anemia (low hemoglobin), evaluate symptoms like fatigue or pale skin, screen for genetic blood disorders, or monitor treatment responses for conditions like sickle cell disease or chronic kidney disease.
What to Expect Before the Test
No special preparation is needed. You’ll have a small needle inserted into your arm or hand to draw a blood sample. It usually takes a few minutes, and you may feel a brief pinch. If you’re prone to bruising, inform your healthcare provider.
What the Results Mean
Results are qualitative (yes/no) or quantitative (specific concentration). Low levels may indicate anemia or blood loss; high levels could signal polycythemia or dehydration. Your doctor will interpret results in the context of your symptoms and medical history.
Common Conditions Linked to Abnormal Results
Low hemoglobin levels may suggest iron deficiency, vitamin deficiencies (like B12 or folate), chronic illnesses, or blood disorders. High levels could point to conditions like polycythemia vera or dehydration. Always discuss findings with your provider.
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
Hb Screening/Confirmatory Test
Frequently asked questions
How long does it take to get my results back?
Can I eat or drink before this test?
What if my hemoglobin is outside the normal range?
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