Red Blood Cell Count (with Incubation Adjustment)
This test measures the number of red blood cells (RBCs) in your blood, adjusted for conditions that might occur after blood is drawn and stored at body temperature (incubation).
["RBC counts help diagnose and monitor conditions affecting red blood cells, such as anemia or blood loss."]
Key facts at a glance
- LOINC
- 40432-7
- Short code
- OF Incubated RBC Cont-Imp
- Synonyms
- OF Incubated RBC Cont-Imp
- 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
- 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 Is Done
Your healthcare provider may order this test if you have symptoms like fatigue, pale skin, shortness of breath, or unexplained weakness. It may also be used to monitor conditions like anemia, blood disorders, or reactions to certain medications. Incubation adjustments help ensure accurate results when blood samples are analyzed after being exposed to body temperature.
What to Expect Before the Test
No special preparation is needed for this test. You may have a small needle inserted into a vein in your arm to draw blood. The process usually takes a few minutes. If you’re on blood-thinning medication, let your provider know before the test.
What Happens During the Test
The blood sample is collected and then incubated (kept at body temperature) for a short period before analysis. This step helps standardize results, especially if the blood was drawn and processed quickly. The test measures the concentration of red blood cells in your blood.
What the Results Mean
Results are reported as the number of red blood cells per microliter (µL) of blood. A lower than expected count may indicate anemia or other blood-related issues, while a higher count could suggest conditions like dehydration or polycythemia. Your healthcare provider will interpret the results in the context of your overall health and symptoms.
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.
Red blood cell counts are critical for diagnosing and managing conditions like anemia, which occurs when your body doesn’t have enough healthy red blood cells to carry oxygen throughout your body. Incubated RBC counts help ensure accurate results, particularly in cases where blood samples may be exposed to body temperature before testing. Abnormal counts can signal underlying health issues that require further investigation, such as bone marrow disorders, chronic diseases, or nutritional deficiencies.
Short name
RBC Count (Incubated)
Frequently asked questions
How long does it take to get my RBC count results?
Can I eat or drink anything before this test?
What does an abnormal RBC count mean?
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