What Is Myriad Genetics and How Does It Work? 🧬

Myriad Genetics is one of the largest clinical laboratory companies in the United States, specializing in genetic testing services. If you're exploring genetic testing options—whether for health risk assessment, family planning, or medical diagnosis—understanding what Myriad offers, how their tests work, and what to expect from the results can help you make an informed decision about whether their services fit your needs.

What Myriad Genetics Does

Myriad Genetics is a publicly traded company that develops, manufactures, and offers genetic tests ordered by healthcare providers and sometimes directly to consumers. The company operates as a Clinical Laboratory Improvement Amendments (CLIA)-certified lab, meaning it meets federal standards for testing accuracy and quality.

The company's core business centers on interpreting genetic information from DNA samples to assess health risks, identify disease-causing mutations, or guide treatment decisions. They don't manufacture genetic testing kits in the consumer ancestry sense (like 23andMe or AncestryDNA focus on genealogy). Instead, Myriad provides clinical-grade tests typically ordered by doctors, genetic counselors, or other healthcare providers.

The Main Categories of Tests Myriad Offers

Myriad's testing portfolio spans several health areas:

Cancer Risk Assessment
The company is best known for tests like BRACAnalysis, which screens for BRCA1 and BRCA2 gene mutations linked to increased breast, ovarian, and other cancer risks. They also offer panels that test multiple genes associated with hereditary cancer syndromes.

Reproductive Health and Carrier Screening
Tests that identify whether you carry genes for conditions like cystic fibrosis, sickle cell disease, or spinal muscular atrophy—useful for family planning or understanding risk before pregnancy.

Psychiatric and Mental Health
Tests like Genomind's Precision Medicine tests (Myriad acquired Genomind in 2023) analyze how your genetics may influence response to psychiatric medications, helping providers personalize treatment decisions.

General Disease Risk Assessment
Other tests assess predisposition to conditions like cardiovascular disease, diabetes, or Alzheimer's.

The specific tests available can change, and not all tests are ordered with equal frequency. Your healthcare provider would recommend the test(s) most relevant to your medical history and concerns.

How the Testing Process Works

You don't order tests directly from Myriad in most cases. Instead, a doctor, genetic counselor, or other qualified healthcare provider orders the test based on your medical history and symptoms.

Here's the typical workflow:

1. Clinical assessment — Your provider discusses your family history, personal health, and reasons for testing
2. Sample collection — You provide a DNA sample, usually a saliva sample or blood draw
3. Lab analysis — Myriad's lab sequences and analyzes your DNA for specific mutations or genetic markers
4. Result interpretation — Geneticists and laboratory specialists interpret findings and prepare a report
5. Provider consultation — Your provider discusses results with you, explains implications, and recommends next steps

The time from sample submission to results typically ranges from days to a few weeks, depending on the test complexity and current lab volume.

Key Factors That Influence Your Results and Their Meaning

Your genetic test results depend on several variables:

The specific genes tested
Different tests examine different genes. A BRCA panel only looks at BRCA1 and BRCA2, while a broader hereditary cancer panel tests 25+ genes. More genes tested can catch more mutations but also increases the chance of finding variants of uncertain significance (VUS)—results that scientists don't yet fully understand.

Your ancestry and ethnicity
Genetic databases that help researchers interpret variants are heavily weighted toward European ancestry. If you have African, Asian, Hispanic, or other non-European ancestry, your variants may be less well-studied, making interpretation more uncertain. This is an ongoing limitation in genetic medicine worth discussing with your provider.

Your family history
A positive family history of a specific cancer or condition can make certain genetic findings more clinically significant. The same mutation may carry different weight depending on whether your relatives have been affected.

The laboratory's interpretation standards
Different labs sometimes classify the same variant differently—as pathogenic (disease-causing), benign (harmless), or of uncertain significance. Myriad's interpretations should follow established guidelines, but variations exist across the field.

Environmental and lifestyle factors
Finding a mutation doesn't guarantee you'll develop a condition. A BRCA mutation significantly raises cancer risk, but not everyone with the mutation develops cancer in their lifetime. Other factors—age, hormones, lifestyle, other genes—all play roles.

What Results Actually Mean

Genetic test results fall into a few categories:

Positive for a pathogenic variant
You carry a mutation associated with disease risk. This typically prompts discussion of surveillance, prevention strategies, or medical management depending on the condition.

Negative result
No mutations found in the genes tested. This reduces—but doesn't eliminate—the risk for the condition in question.

Variant of uncertain significance (VUS)
You carry a mutation that scientists don't yet fully understand. You and your provider may need to monitor new research or consider retesting as knowledge evolves.

Inconclusive
The test couldn't provide a clear answer, sometimes due to technical factors or the complexity of your genetic makeup.

Results are not pass/fail judgments about your health. They're information that, combined with your medical history, family history, and lifestyle, helps shape a more complete health picture.

Who Should Consider Testing—And Who Might Not

Testing often makes sense if:

• You have a strong family history of a genetic condition
• You're planning pregnancy and want carrier screening
• You've been diagnosed with a condition that may have a genetic cause
• Your provider recommends it based on your health profile
• You're of certain ancestry with elevated risk for specific conditions (like Ashkenazi Jewish ancestry and BRCA mutations)

Testing may be less relevant if:

• You have no family history of genetic conditions
• Your provider hasn't indicated a clinical reason for testing
• You're seeking general ancestry information (other services better serve that purpose)
• You're uncomfortable with the possibility of discovering uncertain or incidental findings

Important consideration: Genetic testing can reveal unexpected findings unrelated to why you were tested—for instance, discovering a mutation you didn't suspect. Before testing, discuss with your provider or a genetic counselor what kinds of results you'd want to know about and how you'd handle unexpected information.

Cost and Access Considerations

Myriad tests are usually ordered through healthcare providers, not purchased directly by consumers. Insurance coverage, out-of-pocket costs, and access vary significantly depending on your insurance, whether your provider's order meets medical necessity criteria, and the specific test.

Some tests may be covered if you meet clinical criteria; others may require prior authorization. If you're uninsured, Myriad and many labs offer financial assistance programs. Your provider's office can often help navigate insurance and cost questions before ordering.

The Bigger Picture: What to Evaluate Before Testing

Before pursuing genetic testing through any provider, including Myriad, consider:

• Why testing matters to your specific situation — Is there a medical decision it would inform?
• The limitations of the results — What will you learn, and what won't you learn?
• Your emotional readiness — How will you feel about possible findings?
• Privacy and data use — Where your genetic data is stored and how it's used
• Next steps — If you test positive, what would you actually do with that information?

Genetic counseling before or after testing—with a certified genetic counselor—can help clarify these questions and put results in context. Your healthcare provider can refer you to a counselor.

Myriad Genetics is a significant player in clinical genetic testing, with tests that provide medically actionable information for many people. But whether their services are right for you depends entirely on your medical history, family situation, and what information you're trying to gather. A conversation with your doctor or a genetic counselor is the best starting point to figure out if genetic testing—and which type—actually makes sense in your circumstances.