
CBC
Description
"Complete Blood Count (CBC)" test measures red and white blood cells, platelets, and hemoglobin to assess overall health and detect underlying conditions. Doctors often use this test to investigate symptoms like fatigue, bruising, or frequent infections. Abnormal results may signal anemia, immune disorders, or inflammation. The test involves a simple blood draw and provides essential insights into your body’s immune and circulatory function. Routine CBC testing helps guide care decisions and supports long-term health monitoring.
Category
Blood Cells

Complete Blood Count
Procedure
Invasive
Sample Type
Blood – Whole Blood
Units
Trillion Per Liter | Grams Per Deciliter | Grams Per Liter | Percentage | Billion Per Liter | Picograms | Femtoliters | Thousand Per Microliter | Million Per Microliter | Ratio
Procedure Category
Blood Draw
Test Group
Hematology Group, Complete Pulmonary Function Group
Test Group Description
Complete Pulmonary Function Group: Comprehensive evaluations of respiratory function offer detailed insights into lung function, airway inflammation, and structural abnormalities, facilitating the precise diagnosis and management of pulmonary conditions. Hematology Group: Tests within this group focus on evaluating various aspects of blood health and function. These assessments provide insights into red blood cells, white blood cells, platelets, and other components of the blood.
Normal Range
Optimal Range
For All Individuals and Gender-Specific Ranges:
Blood Count Basic:
Red Blood Cells (RBC): Conv. Unit: 4.50–5.50 ×10⁶/µL (Men) | 4.10–5.00 ×10⁶/µL (Women) | SI Unit: 4.50–5.50 ×10¹²/L (Men) | 4.10–5.00 ×10¹²/L (Women)
Hemoglobin (Hb): Conv. Unit: 14.50–16.00 g/dL (Men) | 13.50–15.00 g/dL (Women) | SI Unit: 145–160 g/L (Men) | 135–150 g...
For All Individuals and Gender-Specific Ranges:
Blood Count Basic:
Red Blood Cells (RBC): Conv. Unit: 4.14–5.80 ×10⁶/µL (Men) | 3.77–5.28 ×10⁶/µL (Women) | SI Unit: 4.14–5.80 ×10¹²/L (Men) | 3.77–5.28 ×10¹²/L (Women)
Hemoglobin (Hb): Conv. Unit: 13.0–17.7 g/dL (Men) | 11.0–15.0 g/dL (Women) | SI Unit: 130–177 g/L (Men) | 110–150 g/L (...
Key Reasons For Testing
Overall Health Check: Provides a snapshot of overall health by evaluating the number and quality of blood cells.
Diagnosing Anemia: Helps identify and monitor types of anemia, including iron or vitamin B12 deficiencies.
Detecting Infection or Inflammation: Tracks white blood cell changes to identify infections or inflammation.
Monitoring Treatment: Assesses how well treatments like chemotherapy or blood transfusions are working.
Screening for Blood Disorders: Detects conditions like leukemia, lymphoma, or other blood-related issues.
Results That Differ From The Norm (Direct and Indirect Causes)
Abnormal results may indicate:
Anemia (low red blood cell count)
Autoimmune hemolytic anemia (immune system attacks red blood cells)
Bacterial infection (infection caused by bacteria)
Chronic kidney disease (long-term kidney damage or dysfunction)
Folic acid deficiency
Hemorrhage (excessive bleeding)
Inflammatory bowel disease (ch...
Currently, this test is not directly associated with any conditions listed on the Health Status page. However, it may be included as part of a broader set of tests linked to specific health conditions.
Health Status Conditions It May Be Used To Assess
References
Important Note
Any medical procedure yielding results outside the norm may be directly or indirectly linked to the conditions outlined on this page. Various factors, including genetics, medication and supplement usage, recent illnesses, pregnancy, pre-test eating, smoking, and stress, can impact the test's outcome. Additionally, factors like false positives, false negatives, inaccurate analyses, and others can influence results.
Reference ranges, which help healthcare professionals interpret medical tests, may vary depending on age, gender, and other factors. They may also differ between laboratories due to variations in instruments and methods used. Optimal ranges are designed for preventive purposes, aiming to identify trends and potential risks early, while normal ranges reflect conventional laboratory values indicating no current disease or pathology. Your healthcare practitioner may have specific reasons for testing that deviate from the usual or may interpret results differently based on individual circumstances. Proper interpretation typically involves considering clinical findings and other diagnostic tests. Hence, it is crucial to provide your healthcare professionals with a comprehensive medical history, consult with them for result interpretation, and follow their guidance for potential re-testing or additional diagnostics.
Disclaimer
This content is provided solely for informative and educational purposes. It is not intended as a substitute for medical advice or treatment from a personal physician. Regarding the interpretation of their medical test results and/or specific health questions, it is recommended that all readers and viewers consult their physicians or other qualified health professionals. The publisher is not responsible for any adverse health effects that may result from reading or following the information in this educational content. Before beginning any nutrition, supplement, or lifestyle program, all viewers, especially those taking prescription or over-the-counter medications, should consult their physician or health care practitioner.
Please note that while prominent lab names are included in this content, we cannot guarantee that these labs offer all the tests mentioned. For confirmation, individuals should contact the labs directly or consult their medical practitioners. The information provided reflects general knowledge at the time of publication and may not include recent updates or emerging research. Readers should verify details with qualified professionals to ensure the most up-to-date and accurate guidance.
[1] Hoffbrand AV, Moss PAH. Hoffbrand's Essential Haematology. 7th ed. Wiley-Blackwell; 2016.
[2] McPherson RA, Pincus MR. Henry's Clinical Diagnosis and Management by Laboratory Methods. 23rd ed. Elsevier; 2016:451-455.
[3] Brill JR, Baumgardner DJ. Normocytic anemia. Am Fam Physician. 2000;62(10):2255-2263.
[4] Bain BJ. Blood Cells: A Practical Guide. 5th ed. Wiley-Blackwell; 2015.
[5] Lippi G, Salvagno GL, Montagnana M, et al. Influence of hemolysis on routine clinical chemistry testing. Clin Chem Lab Med. 2006;44(3):311-316.
[6] Provan D, Singer CR, Baglin T, Dokal I. Oxford Handbook of Clinical Haematology. 4th ed. Oxford University Press; 2015.
[7] van Walraven C, Wong J, Hawken S, et al. Diagnosing anemia in primary care: a structured approach to classify patients using a complete blood count. BMC Fam Pract. 2010;11:12.
[8] Bessman JD, Gilmer PR Jr, Gardner FH. Improved classification of anemias by MCV and RDW. Am J Clin Pathol.1983;80(3):322-326.
[9] Buttarello M, Plebani M. Automated blood cell counts: state of the art. Am J Clin Pathol. 2008;130(1):104-116.
[10] Lee SH, Erber WN, Porwit A, Tomonaga M, Peterson LC. ICSH guidelines for the standardization of bone marrow specimens and reports. Int J Lab Hematol. 2008;30(5):349-364.
[11] Baruch D, Bessman JD, Wroblewski M. Red cell distribution width and its application in detecting iron deficiency anemia. Clin Lab Haematol. 1984;6(3):221-227.
[12] Snyder MR, Zhang Y, Kushner JM. Updates on the role of CBC in evaluating nutritional deficiencies. Nutr Clin Pract. 2019;34(3):388-393.
[13] Gulati G, Song J, Florea AD, Gong J. The complete blood count and automated differential cell count: utility and critical limits. Clin Lab Med. 2015;35(1):169-191.