Companion diagnostics are specialized tests that identify patients most likely to benefit from
specific treatments, ensuring personalized and effective therapy. These diagnostics can detect
genetic mutations or biomarkers and determine drug susceptibility in pathogens for individual
patients. By aligning treatments with individual patient profiles, companion diagnostics enhance
the precision, efficacy and cost-effectiveness of medical interventions. Demonstrating the value
of companion diagnostics can be challenging as the primary benefit lies in ensuring that expensive
therapies are only given to patients most likely to respond, which translates to significant cost
savings and improved outcomes over time. Yet, these benefits are not always immediately apparent,
making it difficult to justify the initial investment to doctors, insurers, and other
stakeholders.