Lymphocytes levels: what's normal, high and low
White blood cells central to your immune response, especially against viruses.
Medically reviewed by Youmna DiStefano, MD · Last reviewed September 2026
The short answer
Lymphocytes is measured with a standard blood draw; no fasting is needed. A typical reference range is 20.0 – 40.0 %. At TestWell it's $21.99 all-in as CBC with Differential, results in 1–3 business days, drawn at Quest or Labcorp. An out-of-range result is a prompt to look closer, not a diagnosis.
- Units
- %
- Sample
- Blood draw
- Fasting
- Not required
- Results
- 1–3 business days
- Price
- $21.99
- Labs
- Quest or Labcorp · BioReference in NY/NJ
Lymphocytes Reference Range
These are the typical adult reference ranges used by major US labs. Your report will include the specific range used by the lab that processed your sample.
| Population | Range |
|---|---|
| age 18+ | 20.0 – 40.0 % |
Reference ranges are educational. Always interpret your result with the specific range printed on your lab report and discuss anything outside the range with a clinician.
What your Lymphocytes result may mean
Often reflects viral infection or, less commonly, certain blood disorders.
What a high Lymphocytes means: causes, symptoms, next steps →Can reflect recent steroid use, severe stress, HIV, or immunosuppressive therapy.
What a low Lymphocytes means: causes, symptoms, next steps →Educational only — not a diagnosis. Many factors can influence a single result. Discuss anything that concerns you with a healthcare provider.
How do you get a Lymphocytes test?
Order online, a licensed physician reviews the requisition, and you walk into a nearby lab for the draw. Lymphocytes is available on its own or inside these panels — panels cost less per marker when you want the fuller picture.
| Option | Includes | Price |
|---|---|---|
| CBC with Differential | This marker only | $21.99 |
| Baseline Anemia Panel | 5 tests | $74.99 |
| General Wellness Panel | 4 tests | $89.99 |
| Post-COVID Recovery Panel | 7 tests | $99.99 |
| Fitness & Performance Panel | 8 tests | $119.99 |
Quest vs. Labcorp for Lymphocytes: which lab should you pick?
Both are CLIA-certified national labs and the result is clinically equivalent, so pick whichever location is closer. Your report will print that lab's own reference range, which can differ slightly from the table above.
| Lab | Available | Price |
|---|---|---|
| Quest Diagnostics | Yes | $21.99 |
| Labcorp | Yes | $21.99 |
| BioReference (NY & NJ) | Yes | $18.99 |
Need help choosing a location? Use the lab finder to see draw sites near your ZIP.
Related Blood Health biomarkers
Markers commonly tested alongside Lymphocytes.
Frequently asked
Often reflects viral infection or, less commonly, certain blood disorders. A single result above the reference range is a prompt to look closer with a clinician — often a repeat test and related markers — not a diagnosis on its own.
Ready to test your lymphocytes?
Order in two minutes, get physician-approved, and visit a lab the same day. Starts at $21.99.