Infectious Disease Physician & Defense Expert Witness
25+ years of infectious disease leadership — supporting litigation and healthcare consulting.
Karen Hennessey, MD
Karen Hennessey, MD
I am a board-certified physician with more than 25 years of clinical and leadership experience in a major hospital system. My background includes direct patient care, oversight of clinical teams, participation in research, leadership on hospital committees, and teaching future physicians.
I make this expertise available to defense counsel — providing clear, evidence-based support for case preparation and testimony — and to hospitals and healthcare organizations through consulting and policy review. You can review my full background and qualifications on the Credentials page.
Areas of Expertise
Sepsis protocols & hospital response
Hospital-acquired infections (HAIs)
COVID-19 policies & isolation compliance
Antibiotic resistance & stewardship
ICU infectious disease management
Infection control in hospitals and long-term care
Why Attorneys Choose Me
Depth of Experience – 25+ years in clinical infectious disease and hospital leadership.
Defense-Aligned – Exclusively supporting defense counsel and hospital systems.
Flexible Support – Available for confidential case preparation and ready to testify at deposition or trial when required.
Not every case goes to trial — but every case benefits from clear medical analysis. I provide behind-the-scenes support to help defense teams review records, clarify infection control standards, and prepare strategy. And when needed, I am fully prepared to testify in deposition or at trial.