
Complete Blood Count (CBC) with NLR, Differential, and Platelets
Diagnostic Blood Test:
- White Blood Count (WBC)
- Red Blood Count (RBC)
- Hemoglobin (Hbg)
- Hematocrit (HCT)
- MCV
- MCH
- MCHC
- Red Cell Distribution Width (RDW)
- Platelets
- Neutrophils
- Neutrophils (Absolute)
- Lymphocytes
- Lymphocytes (Absolute)
- Neutrophil/Lymphocyte Ratio
- Monocytes
- Monocytes (Absolute)
- Eosinophils
- Eosinophils (Absolute)
- Basophils
- Basophils (Absolute)
- Immature Cells
- Immature Granulocytes
- Immature Granulocytes (Absolute)
- NRBC
- w/ Reflex for Immature Cells
White blood cells (WBCs), or leukocytes, protect the body from infection. A low WBC count may signal various medical conditions, including autoimmune disorders, cancer, or problems with the liver, spleen, or bone marrow. A high WBC count may be caused by infection, inflammatory conditions, leukemia, or injury.
Red blood cells (RBCs) carry oxygen to all of the tissues of the body. When the body has too few RBCs, it may be a sign of anemia, bone marrow conditions, vitamin deficiencies, or cancer. Too many RBCs may signal heart problems, kidney tumors, lung scarring, or bone marrow conditions.
Hematocrit (HCT) indicates how much of the blood is made of red blood cells. HCT is dependent on the number and size of the red blood cells. Low levels of HCT may indicate various health conditions, while elevated HCT levels can increase the risk of heart attack or stroke.
Hemoglobin is a protein found in red blood cells that helps transport oxygen to and remove carbon dioxide from the body’s tissues. Hemoglobin testing can provide information about hydration levels and the health of the blood cells. Conditions that affect the liver, heart, and lungs can also change hemoglobin levels.
Mean corpuscular volume (MCV) describes the average size of each red blood cell. Normal-sized red blood cells are important for carrying oxygen around the body. Certain blood disorders, vitamin deficiencies, or other health conditions can alter the MCV.
Mean corpuscular hemoglobin (MCH) is an indicator of how much hemoglobin (the protein that carries oxygen) is present within a single red blood cell. It describes how well oxygen is being transported to all of the body’s tissues. Changes in MCH may be due to blood disorders, nutritional deficiencies, kidney failure, or other conditions.
Mean corpuscular hemoglobin concentration (MCHC) tests calculate levels of hemoglobin (the protein that carries oxygen) within a group of red blood cells and compare this with how big the cells are. This test can help identify potential problems with the blood, kidneys, or heart.
Red cell distribution width (RDW) describes how different red blood cells are when it comes to their size. Ideally, all red blood cells will be similarly sized. A high RDW means that the body is creating red blood cells in very different sizes; this may be a sign of various health problems.
Measuring the number of reticulocytes can diagnose certain types of anemia or provide information about the health of the bone marrow, kidneys, and liver.
Platelets are small cell fragments that help form blood clots and prevent bleeding after an injury. Platelet numbers may drop as a result of health conditions like infection, autoimmune disease, or blood cancer, or may rise due to anemia, inflammatory health conditions, or other cancer types.
Neutrophils white blood cells that kill germs like bacteria, viruses, and fungi in order to protect the body from infection.
Lymphocytes, including T cells and B cells, fight infection and produce antibodies (proteins that help the immune system find and destroy pathogens).
Monocytes are white blood cells that protect the body from germs and remove dead or damaged cells.
Eosinophils are a type of white blood cell that destroy parasites and cancer cells and are involved in the body’s allergic response.
Basophils are white blood cells that recognize early signs of infection, help heal wounds, and help activate the body’s allergic response.
Neutrophils are a type of white blood cell that kill germs like bacteria, viruses, and fungi in order to protect the body from infection.
Eosinophils are a type of white blood cell that destroy parasites and cancer cells and are involved in the body’s allergic response.
The Immature Granulocytes test describes what percentage of white blood cells are immature granulocytes. Certain types of white blood cells — neutrophils, eosinophils, and basophils — are granulocytes. Most of the granulocytes in the blood are fully-functioning and mature. Too many immature granulocytes may be a sign of infection, inflammation, or cancer.
Nucleated red blood cells (NRBC) are immature (not yet fully functional) red blood cells. They are not usually found within the bloodstream, so their presence may indicate low oxygen levels, spleen conditions, or blood disorders such as leukemia.
Pairs well with

Complete Blood Count (CBC) with NLR, Differential, and Platelets
If you have any questions, you are always welcome to contact us. We'll get back to you as soon as possible, within 24 hours on weekdays.
-
Shipping Information
Use this text to answer questions in as much detail as possible for your customers.
-
Customer Support
Use this text to answer questions in as much detail as possible for your customers.
-
FAQ’s
Use this text to answer questions in as much detail as possible for your customers.
-
Contact Us
Use this text to answer questions in as much detail as possible for your customers.
How it works
Purchase your tests
Purchase this test and any other tests you'd like online. A healthcare provider will review and approve your test requests; no healthcare provider visit is required.
Provide your sample
Visit a Labcorp location near you for sample collection. Use our Labcorp locator below to find a location near you.
Get your results
Our partnered facilities will process your bloodwork. Lab Results typically arrive within 14 business days, and we will email them to you as soon as they arrive.
Lab work FAQs
Please read our FAQs page to find out more.
How quickly will my lab results arrive?
Your lab results will typically arrive within two weeks, though processing time may vary based on the size and complexity of your panel. Rest assured, once your results are ready, they will be securely delivered to your email. No waiting rooms. No chasing paperwork. Just precision diagnostics at your fingertips.
Does Marek Diagnostics accept insurance?
Marek Diagnostics is a cash-pay service. Our platform offers direct access to comprehensive testing without the limitations, denials, or delays imposed by insurance companies. If traditional insurance covered the kind of proactive, high-quality lab work we offer, Marek Diagnostics wouldn’t need to exist.
However, many clients successfully use their HSA/FSA to cover their testing costs. Marek Diagnostics is partnered with TrueMed for convenient deployment of HSA/FSA funds at checkout.
My panel Meets Treatment Requirements — what does that mean?
Marek Diagnostics is an extension of Marek Health, the leading health optimization platform designed to turn your results into informed action.
If your panel Meets Treatment Requirements, you’re eligible to enroll into Guided Optimization, an exclusive program that connects you with:
- Detailed, expert led lab analysis
- A consultation with a Marek Health coach and board-certified medical provider
- A precision health optimization plan
- Access to high-quality treatment options
If you’re unsure what to do with your results, Marek Health is the bridge between lab results and achieving your goals.
Do I need to pay a separate fee at the lab to get my blood drawn?
No additional payment is required at the lab. Our expert-built panels include the venipuncture and if you’re building a custom panel or testing biomarkers individually, a $5 venipuncture fee will be automatically added at checkout.