CNS pipeline · person

Spencer R. Berthelsen, MD

Director of Ionis Pharmaceuticals since May 2002. An internist, he practiced at the Kelsey-Seybold Clinic in Houston until 2017, where he held senior leadership roles including Medical Director and Managing Director, and has served as Clinical Professor of Medicine at Baylor College of Medicine and UT Health Science Center.

  • 1 company

Current roles

Appears with

People sharing a company with Spencer.

People and affiliation data assembled from public company disclosures, SEC filings, and conference materials — every record source-cited under psychiatrist-authored guardrails.