About the 10 Essential Blood Tests
Purpose of these tests
This panel gives you and your provider a broad snapshot of your overall health from a single annual draw. It screens for early signs of conditions that often show no symptoms, including diabetes, kidney disease, liver dysfunction, anemia, high cholesterol, and thyroid disorders.
Chronic diseases such as heart disease, cancer, and diabetes are the leading causes of death and disability in the United States. Three in four American adults have at least one chronic condition, and over half have two or more, according to the CDC’s chronic disease overview. Many of those conditions do not initially present with noticeable symptoms until they’ve progressed to a more serious level. The panel helps check for diabetes and prediabetes, cardiovascular disease, chronic kidney disease, liver disease, anemia and blood disorders, thyroid dysfunction, and electrolyte imbalances.
This panel serves as a screening tool, not a diagnostic one. An out-of-range result doesn’t mean you have a disease, but it does require follow-up testing and a conversation with your provider.
The panel serves three purposes:
- Screening: Most primary care guidelines support an annual wellness panel for adults 18 and older, with more frequent testing for those managing chronic conditions.
- Diagnosis support: Consider this panel when symptoms like fatigue, unexplained weight changes, or frequent urination call for a broad first look.
- Monitoring: Tracks ongoing conditions like diabetes, thyroid disease, or cardiovascular risk, and helps measure how well treatment is working.
This panel doesn’t screen for STIs, cancer markers like PSA (prostate-specific antigen) or CA-125, autoimmune markers like ANA (antinuclear antibody), or advanced cardiovascular markers like Apolipoprotein B (ApoB) or Lipoprotein(a) [Lp(a)]. Those require separate testing.
What does the 10 essential blood tests panel measure?
This panel covers the following markers from a single blood sample processed at a CLIA-certified lab.
Comprehensive Metabolic Panel (CMP): 14-component panel measuring:
- Glucose: The primary sugar in your blood, used as the body’s main energy source.
- Calcium: A mineral that supports bone strength, muscle function, and nerve signaling.
- Sodium: An electrolyte that regulates fluid balance and supports muscle and nerve function.
- Potassium: An electrolyte essential for muscle contraction, nerve function, and fluid balance.
- Bicarbonate (CO2): Reflects how well your body maintains its acid-base balance.
- Chloride: An electrolyte that helps balance fluids inside and outside your cells.
- Blood urea nitrogen (BUN): A waste product from protein breakdown that your kidneys filter out.
- Creatinine: A waste product your kidneys remove, reflecting how well they’re working.
- Albumin: The main protein in your blood, which carries nutrients and helps maintain fluid balance.
- Total protein: The combined amount of all proteins in your blood, reflecting nutritional status.
- ALT (alanine aminotransferase): An enzyme found mostly in liver cells; high levels can signal liver stress.
- AST (aspartate aminotransferase): An enzyme in liver and heart cells; high levels may suggest tissue damage.
- ALP (alkaline phosphatase): An enzyme found in the liver, bone, and other tissues.
- Total bilirubin: A waste product the liver makes when it breaks down old red blood cells.
Complete Blood Count with Differential (CBC): A 10-component panel measuring red blood cells, white blood cells, hemoglobin, hematocrit, and platelets. According to the National Heart, Lung, and Blood Institute, the CBC is one of the most common blood tests and is often done as part of a routine checkup.
- Red blood cell count (RBC): The number of red blood cells carrying oxygen through your body.
- White blood cell count (WBC): The immune cells that fight infection.
- Hemoglobin: The oxygen-carrying protein inside red blood cells.
- Hematocrit: The percentage of your blood volume made up of red blood cells.
- Mean corpuscular volume (MCV): The average size of your red blood cells.
- Mean corpuscular hemoglobin (MCH): The average amount of hemoglobin in each red blood cell.
- Mean corpuscular hemoglobin concentration (MCHC): The average hemoglobin concentration within a given volume of red blood cells.
- Red cell distribution width (RDW): How much your red blood cells vary in size.
- Platelet count: Small cell fragments that clump to form a blood clot.
- White blood cell differential (neutrophils, lymphocytes, monocytes, eosinophils, basophils): Breaks down your white blood cells into five immune cell types.
Lipid Panel: 4-component panel measuring:
- Total cholesterol: The combined amount of all cholesterol types in your blood.
- HDL cholesterol: High-density lipoprotein (HDL), the “good” cholesterol that helps clear LDL from your arteries.
- LDL cholesterol: Low-density lipoprotein (LDL), the “bad” cholesterol that can build up in artery walls.
- Triglycerides: Fat particles your body stores for energy.
VLDL Cholesterol (VLDL): Very low-density lipoprotein, a particle that carries triglycerides through the bloodstream.
Hemoglobin A1c (HbA1c): Your average blood sugar over the past three months, based on how much sugar has attached to hemoglobin, as described by the National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK’s A1C test resource).
High-Sensitivity C-Reactive Protein (hs-CRP): A highly sensitive test that measures a protein that is released by your liver during inflammation, measured at levels sensitive enough to catch low-grade, persistent inflammation.
Vitamin D, 25-Hydroxy, Total: 25-hydroxyvitamin D, the most reliable indicator of your body’s vitamin D status, which, if abnormal, can indicate a bone health problem or a malabsorption disorder.
Iron, Total: The amount of iron in your blood, bound to the transport protein transferrin.
Homocysteine: An amino acid that, at high levels, is linked to cardiovascular and other health risks.
Uric Acid: A waste product formed when your body breaks down purines, found in certain foods and body tissues.
Thyroid Stimulating Hormone (TSH): TSH is produced by the pituitary gland and regulates the production of thyroxine (T4) and triiodothyronine (T3) hormones; it reflects overall thyroid function.
When should I get a 10 essential blood test panel?
Consider testing if any of these apply:
- Fatigue, unexplained weight changes, or persistent low energy
- Frequent urination, increased thirst, or blurred vision
- A provider recommendation for annual wellness labs
- A personal or family history of diabetes, heart disease, or kidney disease
- No recent blood work in the past one to two years
- Symptoms that could point to thyroid problems, like feeling cold all the time, hair loss, or unexplained weight gain
- A new or changing medication that affects blood sugar, cholesterol, or kidney function
For routine screening,
- Adults 18 and older: These tests may be ordered as part of an annual physical or follow-up to a diagnosis.
- Adults managing diabetes, prediabetes, or cardiovascular disease: every three to six months for key markers, as directed by your provider
- Adults managing thyroid disease: TSH monitoring every six to 12 months, or as your provider recommends
- Adults 40 and older: annual lipid panel per ACC/AHA cardiovascular risk guidance
- Pregnant women: metabolic and blood count panels at the first prenatal visit and as directed throughout pregnancy
How It Works
How to get tested
Testing.com assembles this panel from individual Quest Diagnostics tests, combined into a single bundle.
This panel is ordered through a healthcare provider, clinic, or hospital lab. Your provider places the order, you visit a nearby lab or the provider’s office for a blood draw, and results come back through the patient portal or office.
Consumer-direct versions of this panel are available through platforms connected to the same CLIA-certified labs. The lab tests are identical.
Before the test
Fast for eight to 12 hours before your draw. Water is fine. Glucose and triglyceride readings are fasting-sensitive. Your CBC, TSH, creatinine, and most other CMP components aren’t materially affected by recent food, so a non-fasting draw is still useful if fasting isn’t possible. Don’t skip the test entirely.
Tell your provider about all medications and supplements before the draw. A few categories can shift specific results:
- Biotin (vitamin B7) supplements: High-dose biotin can interfere with TSH and other immunoassay results. Stop at least 72 hours before the draw.
- Statins (cholesterol-lowering medications): Can affect liver enzyme readings (ALT and AST).
- Corticosteroids (prednisone, dexamethasone): Can push glucose readings higher.
- Diuretics (water pills): Can shift electrolyte readings, especially sodium and potassium.
If you take daily medications like metformin, levothyroxine, or a blood pressure drug, ask your provider whether to take them before or after a fasting draw. The answer varies by medication.
Avoid intense exercise for 24 hours before the draw. Hard workouts can temporarily raise liver enzymes and WBC counts. Stay well hydrated. Dehydration makes the draw harder and can erroneously affect certain test results.
During the test
- Bring a photo ID and your order confirmation. Check in at the lab.
- A phlebotomist draws blood from a vein in your arm, filling two to four tubes with different colored tops. The draw takes five to 10 minutes.
- A small bandage covers the site. No recovery time needed.
Some people feel lightheaded during or after a blood draw, especially when fasting. Sit for a few minutes before standing up. Bruising at the draw site is common and clears within a few days.
Keep the bandage on for at least 15 minutes to ensure bleeding has stopped. Call your provider if you develop lasting pain, swelling, or signs of infection at the site.
After the test
Results are typically ready within one to three business days after the lab receives your sample, though timing can vary by lab. Some markers may take slightly longer depending on the lab’s workflow.
Results come back through your provider’s patient portal or office. For consumer-direct platforms, results appear in the lab’s secure portal (such as Labcorp Patient or MyQuest). If any result needs prompt attention, the lab or provider may contact you directly.
What Do My Results Mean?
Your report shows each marker, your value, and the lab’s reference range side by side. Reference ranges vary slightly between labs. Your provider reads results in the context of your full health history, medications, and symptoms.
A single out-of-range value doesn’t equal a diagnosis, but may require follow-up testing.
A few factors can shift your readings. Fasting status affects glucose and triglycerides. If you have diabetes, your baseline glucose may already be high. Statins affect liver enzymes. Corticosteroids raise glucose. Intense exercise in the 24 hours before the draw can temporarily elevate liver enzyme levels and WBC counts.
The ranges below are approximate. Always read your results alongside the ranges printed on your own report.
| Marker | Approximate Reference Range | What It Screens For |
| Fasting glucose (CMP) | 70–99 mg/dL | Diabetes, prediabetes |
| Hemoglobin A1c | Below 5.7% | Prediabetes (5.7–6.4%), diabetes (6.5%+) |
| Total cholesterol | Below 200 mg/dL (desirable) | Cardiovascular risk |
| LDL cholesterol | Below 100 mg/dL (optimal) | Cardiovascular risk |
| HDL cholesterol | 40+ mg/dL (men), 50+ mg/dL (women) | Cardiovascular protection |
| Triglycerides | Below 150 mg/dL | Cardiovascular risk, metabolic health |
| TSH | 0.4–4.0 mIU/L | Thyroid function |
| Creatinine | 0.7–1.2 mg/dL (men), 0.5–1.0 mg/dL (women) | Kidney function |
| Hemoglobin (CBC) | 13.5–17.5 g/dL (men), 12.0–15.5 g/dL (women) | Anemia |
| WBC count (CBC) | 4,500–11,000 cells/µL | Infection, inflammation, immune function |
| hs-CRP | Below 1.0 mg/L (low risk) | Cardiovascular inflammation risk |
Reference ranges vary by lab. Read your results alongside the ranges listed in your own report.
If your results are within normal range
All markers in range mean your blood cell counts, metabolic function, kidney and liver markers, cholesterol, blood sugar, inflammation, nutritional markers, and thyroid are within expected limits right now.
That doesn’t mean you’re immune to future changes. Annual retesting tracks trends. A marker that’s normal but creeping toward the edge of the range is worth watching.
If you had symptoms that prompted the test and everything came back normal, follow up with your provider. Normal labs narrow down what’s going on, but they don’t rule out every possible cause.
If one or more results are abnormal
A single out-of-range value isn’t a diagnosis. Results get read alongside your full health history, medications, and symptoms. Here’s what follow-up looks like for specific abnormal markers:
- High fasting glucose level or borderline HbA1c: Repeat fasting glucose, full HbA1c, or an oral glucose tolerance test. The NIDDK’s A1C diagnostic guidance notes that a prediabetes A1C falls between 5.7 and 6.4%, and diabetes is diagnosed at 6.5% or above.
- High LDL or total cholesterol: Repeat fasting lipid panel, possibly with ApoB or Lp(a) for a deeper cardiovascular risk picture. The American Heart Association’s cholesterol resource describes LDL as the main source of cholesterol buildup and blockages in the arteries, and HDL as the “good” cholesterol that helps decrease those blockages.
- Abnormal TSH: Free T4 and/or free T3 to figure out what’s going on with your thyroid.
- High creatinine or low eGFR (estimated glomerular filtration rate): Repeat kidney function panel, possibly with a urine albumin-to-creatinine ratio.
- Low hemoglobin or abnormal CBC: Iron studies, B12, folate, or a peripheral blood smear, depending on the pattern.
- High hs-CRP: Repeat testing to confirm, then discuss cardiovascular risk factors with your provider.
Some abnormal values need attention faster than others. Critically high glucose (above 400 mg/dL), very low hemoglobin (below 7 g/dL), abnormally high or low WBC counts, and severe imbalance of electrolytes typically prompt same-week follow-up. Mildly high cholesterol, borderline HbA1c, or slightly off liver enzymes in an otherwise healthy person are often retested at the next annual visit.
FAQs
Sources
- CDC. About Chronic Diseases. 2026.
- MedlinePlus. Comprehensive Metabolic Panel (CMP).
- MedlinePlus. Complete Blood Count (CBC).
- NIDDK. The A1C Test & Diabetes.
- NHLBI. Blood Tests.
- American Heart Association. About Cholesterol.
- MedlinePlus. Thyroid-Stimulating Hormone (TSH) Test.
- MedlinePlus. Lipid Panel.