LabInformationLab tests, explained

Mono Test (Mononucleosis) in California

Mono Test (Mononucleosis) can be requested without a referral, and this overview covers what to expect. A mono test checks for infectious mononucleosis, a viral illness often called 'mono.' It is usually ordered when someone has a sore throat, swollen lymph nodes, and lasting tiredness that could be mono rather than a common throat infection. This page covers the mono test (mononucleosis) for people in California, in Pacific, from what it measures to how to arrange a draw.

Sample type
blood
Category
General Wellness
Turnaround
1-3 business days
Price
$49
Referral
Not required

A mono test checks for infectious mononucleosis, a viral illness often called 'mono.' It is usually ordered when someone has a sore throat, swollen lymph nodes, and lasting tiredness that could be mono rather than a common throat infection.

What it measures

  • Heterophile antibodies — Substances the immune system makes during mono; a rapid test looks for these.
  • EBV viral capsid antigen (VCA) IgM — An antibody that tends to appear early in an Epstein-Barr virus infection.
  • EBV VCA IgG — An antibody that usually appears later and can stay positive for life.
  • EBV nuclear antigen (EBNA) — An antibody that typically shows up weeks to months after infection.
  • Complete blood count (CBC) — A count of blood cells; certain white blood cells can look unusual during mono.

Who it is for

A clinician such as a primary care provider, urgent care provider, or pediatrician typically orders this test. It is most often used for teens and young adults with symptoms that suggest mono.

Preparation

No fasting or special preparation is needed. Tell the clinician about any medications or recent illnesses before the blood draw.

Results and what they mean

Results are reported as positive, negative, or sometimes unclear, along with antibody levels and blood cell counts. A clinician interprets these together with symptoms and history. This is general information, not medical advice; discuss your results with a qualified clinician.

Requesting the Mono Test (Mononucleosis) in California

Order online, choose a certified collection site in California, and review results through a secure portal. No referral is required, and orders are processed confidentially. Because the region is uneven, coastal metros, inland towns, and rural counties with very different access to testing — worth planning around when you book.

Frequently asked questions

How is the mono test done?

It uses a blood sample, usually drawn from a vein in your arm. Some clinics first use a rapid finger-stick or in-office test.

How long until I get results?

Typical turnaround is 1 to 3 business days, though in-office rapid tests may give a result the same visit.

Can mono be detected right away?

Not always. Antibodies can take time to appear, so a test early in the illness may be negative even if you have mono.

Do I need to fast?

No. Fasting is not required for a mono test.

Mono Test (Mononucleosis) by city in California

All testing in California →   Full Mono Test (Mononucleosis) guide →