Red Blood Cell Morphologic Qualitative Analysis (Microcytic, Normocytic, or Macrocytic Classification)
This test examines the size and shape of your red blood cells (RBCs) to identify if they appear normal, smaller (microcytic), or larger (macrocytic). It helps determine potential causes of anemia or other blood disorders.
["Assessing RBC shape can reveal hidden blood problems that may need further testing or treatment."]
Key facts at a glance
- LOINC
- 13627-5
- Short code
- RBC Smn Ql Micro
- Synonyms
- RBC Smn Ql Micro
- Category
- chemistry
- Sample
- serum
- Container
- Red-top tube (SST)
- 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
- microscopy-light
- CPT
- 85041
- SNOMED
- 900000000000003001
- Specimen volume
- 5 mL
- Stability
- Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
- Hemolysis max
- 500
- Lipemia max
- 1000
- Icterus max
- 500
- TAT
- 4–24 hours
- Order
- routine
Why This Test Might Be Ordered
Your healthcare provider may recommend this test if you have symptoms like fatigue, pale skin, shortness of breath, or unusual bruising. It’s also used when blood tests show low hemoglobin or red blood cell counts, or if you have conditions like iron deficiency or anemia.
What to Expect Before the Test
No special preparation is needed. You’ll likely have a simple blood draw from a vein in your arm. The test involves microscopic examination of your red blood cells under a microscope by a trained lab technician.
What the Results Mean
Results are qualitative (descriptive) rather than numerical. They classify RBCs as microcytic (smaller than normal), normocytic (normal size), or macrocytic (larger than normal). These classifications can guide further testing or treatment plans.
Common Causes of Abnormal RBC Shapes
Microcytic RBCs may suggest iron deficiency, thalassemia, or chronic diseases. Macrocytic RBCs could indicate vitamin deficiencies (like B12 or folate), alcohol use, or certain medications. Normocytic RBCs are typical but may still require further evaluation if anemia is present.
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.
This test is crucial for diagnosing and managing blood disorders. Identifying abnormal RBC shapes helps pinpoint underlying causes, such as nutritional deficiencies, genetic disorders, or chronic illnesses. Early detection can lead to timely interventions, improving your overall health and quality of life.
Short name
Red Blood Cell Shape Analysis
Frequently asked questions
What does a qualitative RBC shape test involve?
Can this test be done at home?
How long does it take to 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 17, 2026. · Read our editorial policy