Key Success Metrics for Medical Science Liaisons

We’ve identified key metrics that MSLs should employ as part of their roles

Robust performance measurement empowers Medical Science Liaisons to demonstrate their value, guide their strategies, and strengthen outcomes for both their organizations and stakeholders. Below, we outline the essential success metrics that reflect the multifaceted impact of MSLs. By focusing on these key metrics, MSLs can showcase their broad contributions to scientific communication, collaboration, and strategy. 

1. KOL engagements

Consistent, high-quality engagement with Key Opinion Leaders (KOLs) is at the heart of the MSL role. Tracking the number and frequency of these interactions—whether meetings, advisory boards, or follow-ups—reflects outreach effectiveness and fosters trusted scientific relationships.

2. Depth and quality of relationships

It is not only the number of interactions that matters, but the strength and depth of each relationship. MSLs assess trust, collaboration, and the long-term value built with KOLs, supporting sustainable scientific exchange and influence.

3. Strategic scientific discussions

Recording the frequency and focus of key topics or presentations shared with healthcare professionals (HCPs) demonstrates the impact of MSLs in conveying critical, timely information that advances clinical knowledge and patient care.

4. Scientific output and educational impact

The delivery of scientific presentations, publications, and educational sessions signals an MSL’s effectiveness in disseminating knowledge. This includes both external contributions, such as conference presentations, and internal programs that enhance the capabilities of commercial and medical teams.

5. Clinical study support and innovation 

MSLs enhance research outcomes by driving clinical study recruitment and supporting investigator-initiated studies. Measuring the number of patients enrolled through MSL efforts and the execution of new studies demonstrates direct impact on research progress and innovation.

6. Digital engagement and omnichannel performance

With the evolution of scientific communication, MSLs increasingly leverage digital channels. Monitoring the effectiveness of webinars, virtual meetings, and other online interactions reveals adaptability and maximizes reach to a wider audience.

7. Actionable insights and strategic value

Capturing and evaluating the insights gathered from KOL and stakeholder interactions ensures valuable information is applied to inform decisions and realign business strategies. Demonstrating how these insights lead to meaningful organizational actions showcases the strategic importance of the MSL function.

8. Stakeholder satisfaction and feedback

Gathering regular feedback from KOLs, HCPs, and internal stakeholders helps assess the perceived quality, relevance, and impact of MSL activities. Monitoring levels of satisfaction—both among peers and external partners—provides guidance for continual improvement.

9. Follow-up and relationship growth

Measuring the rate of follow-up engagements indicates ongoing interest, trust, and the evolving value of relationships over time. A high rate of subsequent discussions points to strong rapport and effectiveness in delivering value.