California
CD4 Count Test in California
The CD4 count test measures the number of CD4 T lymphocytes in blood as part of monitoring immune function in HIV and other immunodeficiency conditions. It is used to track disease progression and response to care.
Order CD4 Count Test in California
Order online and visit a local collection site, or choose an at-home kit where available. No referral and no insurance required.
Order CD4 Count Test- Typical turnaround
- 1-3 business days
- Starting price
- From $188
- Results
- Confidential, online
Quick answer
The CD4 count test, part of a lymphocyte subset panel, measures the number of CD4 T cells in the blood. CD4 cells coordinate the immune response, and HIV targets them over time. Tracking the count helps clinicians understand immune function and guide monitoring. The test uses a blood sample and is interpreted with other results.
What this test measures
CD4 cells are a type of white blood cell that helps organize the immune response. HIV infects these cells and can gradually reduce their numbers, which weakens immunity. A CD4 count gives a snapshot of immune strength and is one of several markers used to follow HIV over time.
The lymphocyte subset panel typically measures CD3, CD4, and CD8 T cells, the CD4 to CD8 ratio, and natural killer and B cell markers such as CD16/56 and CD19. The sample is blood drawn from a vein, and the laboratory uses flow cytometry to count and identify cell types.
The test is ordered for monitoring rather than diagnosis of HIV; a separate HIV test confirms infection. It may also be used in other conditions that affect lymphocyte numbers. Results are interpreted with the person's overall health, treatment status, and other laboratory findings by a qualified healthcare provider.
CD4 Count Test in California cities
Acalanes Ridge, CA
CD4 Count Test in Acalanes Ridge.
Acton, CA
CD4 Count Test in Acton.
Adelanto, CA
CD4 Count Test in Adelanto.
Agoura Hills, CA
CD4 Count Test in Agoura Hills.
Agua Dulce, CA
CD4 Count Test in Agua Dulce.
Ahwahnee, CA
CD4 Count Test in Ahwahnee.
Airport, CA
CD4 Count Test in Airport.
Alameda, CA
CD4 Count Test in Alameda.
Alamo, CA
CD4 Count Test in Alamo.
Albany, CA
CD4 Count Test in Albany.
Alhambra, CA
CD4 Count Test in Alhambra.
Aliso Viejo, CA
CD4 Count Test in Aliso Viejo.
Allendale, CA
CD4 Count Test in Allendale.
Alondra Park, CA
CD4 Count Test in Alondra Park.
Alpine, CA
CD4 Count Test in Alpine.
Alta Sierra, CA
CD4 Count Test in Alta Sierra.
Altadena, CA
CD4 Count Test in Altadena.
Alturas, CA
CD4 Count Test in Alturas.
Alum Rock, CA
CD4 Count Test in Alum Rock.
Amador Pines, CA
CD4 Count Test in Amador Pines.
American Canyon, CA
CD4 Count Test in American Canyon.
Amesti, CA
CD4 Count Test in Amesti.
Anaheim, CA
CD4 Count Test in Anaheim.
Anderson, CA
CD4 Count Test in Anderson.
Angels, CA
CD4 Count Test in Angels.
Angwin, CA
CD4 Count Test in Angwin.
Antelope, CA
CD4 Count Test in Antelope.
Antioch, CA
CD4 Count Test in Antioch.
Anza, CA
CD4 Count Test in Anza.
Apple Valley, CA
CD4 Count Test in Apple Valley.
Frequently Asked Questions
Where can I get a cd4 count test in California?
California has certified laboratories and independent diagnostic centers that offer this panel. Direct-access ordering lets you select a location that fits your schedule.
How much does a cd4 count test cost in California?
Pricing varies by provider and location. Check the price shown at checkout, and contact the testing partner for a written estimate if needed.
Is at-home collection available in California?
For select panels, at-home kits can be shipped to California, collected at home, and mailed back for analysis.
How long do results take in California?
Most results are reported within 1-3 business days after collection.
Ready to get tested?
Order online and visit a collection site near you, or choose a mail-in kit. No referral and no insurance required.
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Every page on this site is reviewed for clarity, sourcing, and accuracy. We update our library as testing options, collection networks, and accreditation standards change.