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Fact sheets

2019 nCov Factsheet HCP
2019 nCov Factsheet Patients

Roche Anti-SARS-CoV-2 Antibody Test Patient Guide

Welcome to CMB

CMB is a pioneer in developing new diagnostic technologies to address unmet medical needs and improve patient care. The laboratory offers clinical assays, ranging from routine blood analyses to HIV and genomic testing. We pride ourselves on our quality service to patients, physicians, hospitals, and pharmaceutical companies. Our organization combines a full service anatomic and clinical laboratory with a clinical trials/research group focused on partnering with physicians to detect disease earlier, make diagnoses, prescribe therapies and monitor results. The company continues to maintain a culture of innovation, quality, and personalized service, while achieving the highest level of client satisfaction.

CMB Laboratory is testing for COVID-19

*** NEW ***

COVID-19 Travel Result RT-PCR Certificate available in 24 hrs. (subject to limited terms and conditions). For specific details on pricing or to schedule an appointment, please visit You may also contact our Client Services Department at 714-880-3397 for more information.

We offer both COVID-19 infection (PCR) testing and Anti-SARS-CoV-2 antibody total test.

Antibody test results are good diagnostic tools to determine if you have been infected or exposed to the virus, and whether immunity is present.

Effective 9/29/2020, CMB Laboratory will be performing Covid-19 Total Antibody test utilizing Roche Elecsys Electro-chemiluminescence Immunoassay methodology. The Roche's Total antibody test is highly accurate at detecting Covid-19 antibodies and has a 99.8% accuracy at ruling out SARS-Cov-2 antibodies in the blood. Antibodies test should not be used to rule out current or recent infections.

** Note: Antibody test results should not be used as the sole basis to diagnose active SARS-CoV-2 infection. It typically takes 1 to 3 weeks after someone becomes infected with SARS-CoV-2 for their body to make antibodies. Depending on when you were infected and the timing of the tests, the tests may not find antibodies in someone with an active infection.

Covid-19 Antibody test by ECLIA: available to draw at CMB Patient Service Centers.

Click to see PSC locations and hours

Covid-19 PCR test collection is available through your physician or at a collection site.

Click to see COVID-19 PCR test collection sites

Please Note: CMB will not collect specimens for this PCR test at our patient service centers. An appropriate specimen should be collected at a health care facility. We will only accept Nasopharyngeal (NP) or Oropharyngeal (OP) swabs at this time.

Caution: COVID-19 specimen must be tightly sealed in an individual specimen bag. Paperwork and any other specimens must be separated from the COVID-19 specimen.

We cannot accept the specimen if there is leakage or is not sealed tightly due to the infectious nature of the specimen.


Temporary Change in Hours of Operation at CMB Patient Service Centers

Effective 03/27/2020

Due to the current situation with COVID-19, hours of operation for our patient service centers have been TEMPORARILY CHANGED.

Click to see updated locations and hours

Clinical Trials

We provide biomarker testing services for the pharmaceutical and biotechnology industries for biomarker validation through phase I, II, III and IV studies. The Clinical Trials team includes experienced scientists for custom assay development and a dedicated team of project managers to effectively address challenging study requirements.

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