Hemoglobin Mass Concentration in Red Blood Cells (by Flow Cytometry)
This test measures the total amount of hemoglobin inside your red blood cells, which can help assess iron stores and red blood cell health.
["Helps check for iron deficiency or anemia by examining hemoglobin inside cells."]
Key facts at a glance
- LOINC
- 726-0
- Short code
- Hgb Ur-mCnc
- Synonyms
- Hgb Ur-mCnc
- Category
- hematology
- Sample
- urine
- Container
- Sterile urine container
- 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
- 10 mL
- Stability
- Room temperature: 2h, Refrigerated: 24h, Frozen: 7d
- Hemolysis max
- 0
- Lipemia max
- 0
- Icterus max
- 0
- TAT
- 4–24 hours
- Order
- routine
Why This Test Matters for Your Health
Hemoglobin is the protein in red blood cells that carries oxygen. When your body doesn’t produce enough hemoglobin or when red blood cells are damaged, it can lead to anemia or other blood-related conditions. This test specifically looks at the hemoglobin *within* your red blood cells, not just the total hemoglobin in your bloodstream.
How the Test Works
Your blood sample is analyzed using flow cytometry, a technique that measures the size, shape, and internal components of red blood cells. This test focuses on the hemoglobin mass inside each cell, which can be affected by conditions like iron deficiency, hemolytic anemia, or certain genetic disorders.
Common Reasons for Testing
Doctors may order this test if you have symptoms like fatigue, pale skin, shortness of breath, or if lab results suggest low red blood cell counts or abnormal hemoglobin levels. It can also be part of a broader evaluation for unexplained anemia or iron studies.
What to Expect Before the Test
No special preparation is needed, but you may fast for 8–12 hours before the test if your blood is drawn early in the morning. Wear a loose-fitting shirt for easy access to your arm.
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.
Clinical Significance
Short name
Hemoglobin RBC Mass
Frequently asked questions
What does a low or high hemoglobin RBC mass mean?
How does this test differ from a standard hemoglobin test?
Can this test be done at home?
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