MMR Titer - More Information

The MMR titer, sometimes known as an MMR immunity test, MMR test, MMR blood test and an MMR lab test, measures MMR blood IgG antibody levels to check for MMR immunity. Through Accesa Labs, people can order an MMR titer test, get tested at a local lab, and get results electronically, typically in a few business days.

What is an MMR Titer Test?

MMR stands for measles, mumps and rubella - three contagious viral infections that are prevented by the combined MMR vaccine. While caused by separate types of infectious agents, these three infectious are typically lumped together because they are preventatively managed with the single MMR vaccine. Because they are commonly encountered in healthcare and school settings, proof of MMR immunity through the MMR blood titer test or documentation of MMR vaccination is frequently required by schools and healthcare organizations. The MMR titer is frequently ordered with the hepatitis B titer and the varicella titer, all of which are part of the immunization titer panel. When people also need tuberculosis screening, the QuantiFERON test is often added as well.

Who Should Get an MMR Titer Test?

The MMR titer is ordered by a wide range of people who need documented proof of measles, mumps, and rubella immunity for compliance, employment, education, or personal health purposes.

Healthcare workers and students

Nurses, physicians, medical assistants, and students in clinical programs usually must demonstrate MMR immunity before employment or rotations. Measles is highly contagious in healthcare settings so confirmed immunity is a standard screening requirement.

Vendor credentialing compliance

Medical device and pharmaceutical sales representatives who need hospital access must submit current MMR immunity documentation through vendor credentialing platforms. Frequently ordered alongside the hepatitis B titer, QuantiFERON-TB Gold Plus test and varicella titer, your MMR titer results will be available in a PDF format that is accepted by all major vendor credentialing platforms.

College and university students

Adults concerned about measles outbreaks

Measles outbreaks in the United States increased significantly in 2024 and 2025, with cases reported across multiple states. Measles is one of the most contagious infectious diseases known and the virus can remain airborne in a room for up to two hours after an infected person has left. Adults who received only one dose of the MMR vaccine and those who received the original inactivated measles vaccine used between 1963 and 1967 (which is thought to provide less durable immunity than the live attenuated vaccine) may not have lasting protection. For anyone with uncertain immunity status, an MMR titer provides information about one's current protection.

People without vaccination records

Many adults do not have accessible MMR vaccination documentation. Rather than defaulting to revaccination, many people choose to first confirm their immunity status through an MMR titer. A positive result on all three components confirms immunity without requiring the MMR vaccination series.

International travelers

Measles is present in many parts of the world. The CDC advises that adults born after 1957 who cannot confirm prior vaccination or immunity have their MMR status verified before international travel.

Women Planning Pregnancy

A rubella infection during pregnancy can cause congenital rubella syndrome. Because the MMR vaccine is live and cannot be given during pregnancy, confirming rubella immunity prior to conception is important. A negative or equivocal rubella result allows vaccination before pregnancy under medical guidance.

MMR Testing - How It Works

The MMR titer is used to check for MMR immunity through measuring immunoglobulin G (IgG) blood antibody levels that protect against the three types of infections. Getting an MMR titer through Accesa Labs is a straightforward process:

• Order Online. Add the MMR titer to your cart, choose a nearby lab location, and complete checkout. No insurance required. The price includes the physician lab order and all lab fees.
• Visit a Lab. Visit your selected lab location for a brief blood draw. Appointments can be scheduled but are not required. No fasting is necessary.
• Receive Your Results. MMR titer results are typically available within 4 business days. Results are delivered electronically as a PDF that can be submitted to an employer, school, or credentialing platform.

The most common reason that someone might already have MMR immunity is because they previously received the MMR vaccine series. The MMR vaccine series is routinely given to children in the United States and in many other places. The MMR vaccine is a weakened live virus vaccine that gives the recipient a very mild case of each infection. In doing so, the immune system "learns" what MMR infections look like and generates memories of them that usually lead to MMR immunity. If one is exposed to a covered pathogen after a successful MMR immunization series, the body can mount an effective IgG antibody response that immediately clears out the infection. For many people, receiving the MMR vaccine series can confer lifelong immunity which can be measured by performing and MMR titer antibody blood test. The MMR vaccine is often recommended for adults born after 1957 who have not been immunized and children starting at 12-15 months. Various factors influence what type of MMR antibody immune response is seen after vaccination. Additionally, the stability of MMR titer levels over time can vary from person to person.

Infrequently, another reason someone might have MMR immunity and a positive MMR test result is because they were actually infected by mumps, measles and rubella in the past. With the widespread adoption of the MMR vaccine, it is unusual to find someone who had all three MMR infections and recovered. Should this be the case, the body's immune system typically develops native immunity which is protective in case one is exposed to one or more of the MMR infections in the future. If one is getting an MMR titer to check for immunity, they have presumably recovered from all three infections and should demonstrate immunity in their blood titer results.

Add to Cart Checkout

MMR Blood Test - Understanding Results

This MMR titer is designed to check for MMR immunity by measuring the IgG antibody blood levels for the three MMR components - the measles titer, mumps titer, rubella titer. Typically, the gold standard MMR titer is a quantitative, or numerical, titer that reports an actual number result as opposed to positive (reactive) or negative (nonreactive). Getting an MMR titer test near you is relatively straightforward as most local lab locations have the necessary equipment to run the MMR test after the blood has been drawn. MMR lab results come back fairly quickly and the results are not difficult to interpret.

In looking at the sample MMR lab test report provided above, the IgG antibody levels for measles, mumps and rubella are reported as numbers in the results column. Under that is a reference range provided by the lab that includes a value and interpretation of the value. If the IgG number reported falls with the positive range, that means one is immune to the MMR component being reviewed. If one is negative that means that one is not immune and, in most cases, will need to get the MMR vaccine series again even if two out of three come back with immunity. An equivocal MMR titer component result generally is interpreted as negative (i.e. requiring the MMR immunization series) although some people might consider repeating the MMR blood test to see a second lab result shows a clear positive or negative MMR titer.

The IgG antibody levels for each MMR component are reported as an index value. The general interpretation for each component is as follows:

A negative or equivocal result for any single component typically prompts a recommendation for the full two-dose MMR vaccine series, even if the other two components are positive.

In the absence of MMR vaccination documentation, many people still opt to get an MMR titer test before getting the MMR vaccine series again. The reason for this is that the MMR vaccine, as mentioned, is a weakened live virus vaccine and there is always a risk of getting sick from a live vaccine. Additionally, the MMR vaccine series requires two doses spread out by twenty eight days which adds extra cost and inconvenience to the MMR immunity process.

Add to Cart Checkout

If you are looking for other types of titer tests, please see our titer test page. For compliance purposes, a 9 panel drug screening test is sometimes needed at the same time as MMR titer results.

How To Get an MMR Titer at Accesa Labs

1. Order online. Add the MMR titer to your cart, select a nearby lab location, and complete checkout. The price includes the physician order and all lab fees. No insurance required.
2. Visit a local lab for a blood draw. Appointments are available but often not required. No fasting is needed. The visit typically takes 15–30 minutes.
3. Receive your results electronically. Results are usually ready within about 4 business days and delivered as a downloadable PDF.
4. Submit or share your report. Use the PDF for school, employer, or vendor credentialing requirements, or review it with your healthcare provider to decide on next steps (vaccination if any component is negative or equivocal).

Accesa Labs makes MMR titer testing fast, affordable and secure. No health insurance or subscription is required.

Add to Cart Checkout

MMR Titer and Vaccine Resource

CDC - MMR