Meet Our Physicians

Dr. Ryan Herrington is double board-certified in Public Health and Addiction Medicine. He is a trained expert witness (plaintiff and defense) and certified correctional healthcare provider. Given his experience serving as statewide and facility medical director in multiple states with 10+ years’ experience (jail and prison), he is both a seasoned clinician and an experienced healthcare administrator.  In addition, he has attended SEAK expert witness deposition training as well as SEAK courses in expert witness consulting practices. He has been retained by over 30 state jurisdictions and Federal Bureau of Prisons. He has solid understanding of the legal concepts of negligence and deliberate indifference, and strives to use a sound and consistent methodology when analyzing a case; his reports are thorough, accurate, evidence-based, and effective at communicating his opinions and educating the triers of fact. 

• Doctor of Medicine, University of Virginia
• Master of Public Health, The Ohio State University
• General Surgery, University of Virginia, Charlottesville, Virginia
• Public Health and General Preventive Medicine, The Ohio State University, Columbus, Ohio

Dr. Patricia David is the founder and managing director of David Medical Services, PLLC. She is dual residency trained in Internal Medicine and Occupational Medicine. She holds an additional master’s degree in public health and a certificate in Patient Safety and Leadership from Johns Hopkins University. She is a Certified Professional in Patient Safety through the Institute for Healthcare Improvement.

Over the last 30 years, she has worked in a variety of health care settings across the country, from large health systems, military clinics, HMOs, state agencies, and her own private practice.  With this clinical and administrative experience, she leverages her knowledge and skills to help clients identify patient safety concerns, develop strategies to enhance health care quality, and improve patient outcomes. Since 1999, state agencies, attorneys, and other third-party entities have turned to Dr. David for her ability to objectively review complex cases, analyze data, formulate recommendations, and produce clear, well written reports.

• Doctor of Medicine, The Ohio State University
• Master of Science in Public Health, University of South Florida
• Internal Medicine, Allegheny General Hospital and University of Virginia/Roanoke-Salem
• Occupational & Environmental Medicine, University of South Florida