Health Tests · Labcorp OnDemand
Complete Blood Count (CBC) Test, $29
$29 · no doctor visit needed
- Order online, walk into 2,000+ locations — no appointment
- Physician order included — no doctor visit required
- Results in your portal in days
Same certified lab your doctor uses. HSA/FSA accepted.
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Order online for $29, walk into any of 2,000+ locations for a blood draw — no doctor's visit needed. Seventeen measurements in one panel — red cells, white cells with differential, and platelets — with results in a day, and no fasting or special preparation.
The short version
$29, one walk-in visit, results in a day
The Complete Blood Count (CBC) Test ($29) counts the cells in your blood — red cells, white cells, and platelets — with a differential that breaks the white cells down by type. Order online, walk in for the draw, results in a day. It is the most common routine blood test there is, and its honest limit is printed on the page itself: it is a screen, not a diagnosis.
Shopping links on this page go directly to Labcorp OnDemand. We don't earn a commission on orders.
Price
| Test | Price | |
|---|---|---|
| Complete Blood Count (CBC) Test | $29 | Order now → |
Prices checked Nov 10, 2026. HSA/FSA eligible. Self-pay; insurance not billed.
What the 17 measurements cover — in three groups
The panel reads as three groups, not seventeen disconnected numbers. Red cells: the red blood cell count, hemoglobin (the oxygen-carrying protein inside red cells), hematocrit (the proportion of red cells to plasma), plus the red-cell indices — MCV (average size), MCH (average hemoglobin per cell), MCHC (average hemoglobin concentration), and RDW (variation in cell size). White cells: the white blood cell count plus the differential — the amount of each type of white cell: neutrophils, lymphocytes, monocytes, eosinophils, and basophils, plus immature granulocytes and immature cells, which are not usually present in significant amounts. Platelets: the platelet count, the cell components essential for blood clotting. The differential is what makes this a CBC with differential rather than a plain count — it says which kind of white cell moved, not just that the total did.
The red-cell numbers — and what patterns they show
The red-cell group is mostly read as patterns, not single values. Hemoglobin and hematocrit describe oxygen-carrying capacity: low values point toward anemia, high values toward too many red cells. The indices narrow the cause. A low MCV — smaller-than-average red cells — is seen with iron-deficiency anemia, thalassemia, and chronic inflammatory conditions; a high MCV — larger-than-average cells — may occur with vitamin B12 or folate deficiency, alcohol use, and certain thyroid or liver conditions. A low MCHC — less hemoglobin per cell than usual — is seen with iron deficiency, thalassemia, chronic inflammatory conditions, and certain long-term illnesses that affect red cell production; a high MCHC is less common and may occur with autoimmune hemolytic anemia, hereditary spherocytosis, severe burns, or certain medications that affect red cell structure. RDW adds one more axis: how much the red cells vary in size. None of these numbers diagnoses anything on its own — they are clues a clinician reads together, against the rest of the panel.
The white-cell numbers — the differential in plain English
Each white-cell type has a job, and the differential shows which one is doing the work. Neutrophils destroy bacteria and fungi and protect the body from infections. Lymphocytes produce antibodies and help fight bacteria, viruses, and other threats. Monocytes break down germs or bacteria that enter the body. Eosinophils are disease-fighting white cells that rise with parasitic infections and allergic reactions. Basophils help fight parasitic infections, prevent blood clotting, and mediate allergic reactions. Immature granulocytes are white cells in an early stage of development, not usually present in significant amounts — their appearance in larger numbers suggests the bone marrow is releasing cells early, often because of infection or inflammation. A high total white count points at infection or inflammation; the differential narrows which kind, and a low count points the other way. Either way, the count is a prompt for follow-up, not a diagnosis.
Platelets — the clotting number
Platelets are the cell fragments that form clots, and the count is the third leg of the panel. A low platelet count can mean bruising or bleeding that does not stop as it should; a high count can mean clotting risk. The symptoms the product page lists as reasons to consider this test — general fatigue, unexplained bruising or bleeding, joint pain, an abnormal heart rate — are the ones that map onto the three cell lines: fatigue onto red cells, bruising and bleeding onto platelets, and the rest onto whatever is driving the white cells. The test earns its keep when one of those symptoms, or a routine checkup, gives a reason to look — as a general wellness purchase with no symptoms and no reason, it is a low-yield buy.
Seventeen measurements means seventeen chances for a borderline result, and a single slightly-out-of-range number in an otherwise normal panel is usually noise, a recent illness, a medication effect, or lab variation. Repeat testing and clinical context turn a number into a plan — a shopping cart does not.
How walk-in CBC testing works
You order the test online, then visit a patient service center for a standard venous blood draw — no doctor’s order, no appointment, and no insurance needed. No special preparation is required for this test — no fasting, no timing window. Results typically post to a secure portal 1 day after your sample arrives at the lab. HSA/FSA accepted. The test must be taken by the purchaser, and it is available to adults 18 to 100. Providers typically recommend routine blood tests such as a CBC once a year, which is why this is often the first test on a checkup list — and if liver or kidney function is the question instead, the companion test is the metabolic panel, which measures the chemistry of the blood rather than its cells. The product page currently shows a 20% off promo code — check the product page for the current price before ordering.
Common questions
Do I need to fast before a CBC test?
No. No special preparation is needed for this test — order online and walk in for the draw. If you take other tests in the same visit, check their prep rules separately, since some do require fasting.
What is the difference between a CBC and a CMP?
A complete blood count measures the cells in your blood — red cells, white cells, platelets. A CMP measures the chemistry dissolved in the liquid part of the blood — sugars, electrolytes, kidney and liver markers, proteins. They answer different questions, and a routine checkup often orders both together.
How often should I get a CBC?
Providers typically recommend routine blood tests such as a CBC once a year. If you are monitoring a known issue — anemia, a low white count, platelets — your clinician sets the cadence, which may be more frequent. Ask your doctor what fits your situation.
Can a CBC diagnose anemia or infection?
No. The test can flag the patterns that suggest those conditions — a low hemoglobin, a high white count — but it cannot diagnose them. The product page states this plainly: a CBC is not a diagnostic test and cannot confirm any specific illness. Diagnosis needs further testing and a clinician reading the result against your history.
What does MCV mean?
Mean corpuscular volume — the average size of your red blood cells. A normal MCV means your red cells are within the expected size range. A low MCV may be seen with iron-deficiency anemia, thalassemia, or chronic inflammatory conditions; a high MCV may occur with vitamin B12 or folate deficiency, alcohol use, or certain thyroid or liver conditions. MCV is only one part of the panel — it cannot diagnose a condition by itself.
What does MCHC mean?
Mean corpuscular hemoglobin concentration — the average concentration of hemoglobin inside your red blood cells. A normal MCHC means your red cells contain an expected amount of hemoglobin for their size. A low MCHC may be seen with iron-deficiency anemia, thalassemia, chronic inflammatory conditions, or certain long-term illnesses that affect red cell production; a high MCHC is less common and may occur with autoimmune hemolytic anemia, hereditary spherocytosis, severe burns, or certain medications. Like MCV, it is best understood by looking at the entire CBC, not on its own.
Is this a home test kit?
No. This is an in-person blood draw at a patient service center — you order online, then walk in for the sample collection. Your results arrive through a secure online portal, typically 1 day after your sample reaches the lab.
Ready to order?
Get your blood counts this week
Order the Complete Blood Count (CBC) Test for $29 and walk in this week — no doctor visit required.