Credentials and education
Key opinion leader
A key opinion leader is a clinician whose views on products or methods are valued by peers, and whom companies may ask to speak, teach or give advice.
A key opinion leader, or KOL, is a health care professional whose views other professionals value. Industry papers describe companies that work with KOLs. One 2026 survey notes that medical science liaisons at pharmaceutical, device and diagnostics companies facilitate scientific exchange with KOLs and health care professionals.
The federal Office of Inspector General says payments tied to company speaker programs carry fraud and abuse risks. Audiences should be told about any money or other tie between a speaker and a company.
The short form is KOL. Related roles include a dental advisory board member and a brand ambassador.