Hemoglobin (Hb) Mass Concentration by Oximetry
This test measures the total amount of hemoglobin in your blood, using a specialized oximetry method to assess oxygen-carrying capacity.
["Hb oximetry helps evaluate red blood cell function and potential blood disorders."]
Key facts at a glance
- LOINC
- 97556-5
- Short code
- Hgb BldC Oximetry-mCnc
- Synonyms
- Hgb BldC Oximetry-mCnc
- 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
- oximetry
- 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 Hb Oximetry Used For?
Hb oximetry is primarily used to diagnose or monitor conditions affecting hemoglobin production, red blood cell health, or oxygen transport in the blood. It may also be part of broader evaluations for anemia, blood transfusions, or pre-surgery screening.
How Is This Test Performed?
This test involves a simple blood draw from a vein. The blood sample is analyzed using oximetry, a method that measures hemoglobin mass without separating it into different types (like HbA1c). Results are reported as a mass concentration of hemoglobin in the blood.
What Does a Result Mean?
While specific reference ranges vary by lab, abnormal results may suggest conditions like anemia (low hemoglobin), polycythemia (high hemoglobin), or other blood disorders. Your healthcare provider will interpret results in the context of your overall health.
Common Conditions Monitored or Diagnosed
Hb oximetry can support evaluations for anemia (due to iron deficiency, chronic disease, or other causes), blood transfusion planning, or monitoring of conditions like sickle cell disease or thalassemia. It may also be used in research or specialized clinical settings.
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 Oximetry
Frequently asked questions
Why might my doctor order this test?
What are typical reference ranges?
How soon will I get 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