NOTICE: TargetDx now has a collection site in San Francisco (Holiday Inn Express San Francisco Airport-North, Strategy Room, 2nd Floor, 373 South Airport Blvd., South San Francisco, CA. 94080). If you have already booked an appointment with us at our San Jose location, you can still come to the San Francisco location between 8 AM- 11:30 AM for sample collection.

We offer same-day results for COVID19 PCR test results for international travel (i.e., China, Hong Kong, Taiwan, etc.) or other purposes. Book directly through our website, or through your patient portal if you have tested with us before.

There is a new travel policy for China effective on July 1, 2022. “Double Nucleic Acid Testing” is required 48 hours and 24 hours before the flight date [SF Chinese Consulate Notice]. Testing must be performed in a CLIA-certified laboratory. We are open Monday to Saturday. We look forward to serving your travel testing needs!  Learn more.

We Are Here To Serve

TargetDx Laboratory (also known as Lung Cancer Proteomics) is an accredited high-complexity clinical laboratory (State ID: CLF-90005077, CLIA ID: 05D2194953) with state-of-the-art equipment and 11,400 sq. ft. of testing capacity. We can provide collection services, and collection kits, process samples in-house with fast turnaround, and handle insurance claims. We work with clinics, schools, continuing care communities, government agencies, and companies across the US to provide COVID-19 viral and antibody tests. If you are interested in partnering with us, email us at

Do you have an IgM or IgG Response to Your COVID-19 Vaccine?

Have you been vaccinated with the Pfizer, Moderna, or J&J vaccine? Do you want to know if you have an IgM or IgG response? Come take a simple blood test. Our S Protein lateral flow or immunoassay antibody detects antibodies induced from the Pfizer, Moderna, and J&J vaccines. Are you wondering if you have been infected in the past? Take our N Protein antibody test and find out.  Book your appointment.

Should I Get a COVID-19 Viral or Antibody Test?

The type of COVID-19 test, viral or antibody, will depend on whether you currently have COVID-19 symptoms. A wide range of symptoms – from mild to severe illness – may appear 2-14 days after exposure to the virus. A PCR test will tell you if you are currently infected with the virus, whereas the antibody test will tell you if you have been infected with the virus or have antibody response to your vaccine.

Reliable & High-Quality

Laboratory Services


COVID-19 Viral Test

The COVID-19 viral test is PCR-based and determines an active SARS-CoV-2 infection. Book your test.


COVID-19 Antibody Test

The COVID-19 antibody test determines if you had an immune response to past infection or to vaccination. Book your test.

Travel Testing

We do travel testing for China and other international travel. Book your test.

EDTA tubes

Respiratory Panel

The Respiratory Panel differentiates whether you have SARS-CoV-2 (COVID-19), Influenza Virus (FLU) or Pneumonia (Human Orthopneumovirus, RSV).

X ray of lungs

Lung Cancer Test

The Lung Cancer Detector Test (LCDT1) detects early Lung Cancer. This test is indicated in patients with an indeterminate lung nodule. Smokers may benefit from this test

Antibody action

Cytokine Storm

Cytokine storm panels evaluates inflammatory markers investigated by researchers for development of drugs, vaccines, and treatments; and to study disease progression.