Physician Assistant Expert Witness

Expert Witness service that bridges medicine and Law with Precision and Integrity

Specialized Medical Expert Witness Backed by Real-World Experience

At Fenn Medical we bring real-world clinical experience to the courtroom. Led by DJ Fenn, PA-C—a Mayo Clinic–trained Physician Assistant with over a decade of frontline medical practice—our expert witness services are grounded in hands-on expertise, not just theory. From high-acuity emergency care to complex surgical assisting and military medical operations in austere environments, we offer a unique, well-rounded perspective that strengthens both plaintiff and defense cases. Our approach is defined by clinical accuracy, objective analysis, and clear communication—delivering expert opinions you can trust to stand up under scrutiny.

As a trusted Expert Witness in Mesa, Arizona, Fenn Medical provides attorneys with thorough, objective case analysis grounded in over a decade of diverse clinical experience. DJ Fenn, PA-C offers expert insight across multiple specialties, including Emergency Medicine, Otolaryngology, Orthopedics, and Trauma Surgery. Every case is approached with impartiality, precision, and a commitment to the highest standards of medical accuracy. Whether serving plaintiff  or defense, Fenn Medical delivers clear, evidence-based opinions that withstand legal scrutiny and support sound decision-making throughout the litigation process. Contact us today to set up a free consultation.

Expert Witness Mesa Arizona

Call Today!  480-310-4095

Objective, Evidence-Based Case Review

Medical expert witnesses play a critical role in bridging the gap between complex clinical information and legal strategy. They provide unbiased, fact-based opinions in cases involving alleged medical malpractice, personal injury, workplace incidents, or standards of care. These experts interpret medical records, assess whether proper protocols were followed, and testify on medical issues relevant to the case. Their opinions can clarify causation, scope of injury, or deviation from accepted standards, making them essential in both civil and criminal proceedings.


At Fenn Medical, we understand that credibility, clarity, and clinical accuracy are non-negotiable in expert witness services in Mesa Arizona. Led by DJ Fenn, PA-C—a Mayo Clinic–trained Physician Associate with extensive experience in emergency medicine, surgery, and otolaryngology—our team offers expert witness services that are rooted in real-world practice. We provide impartial, evidence-based evaluations, timely case reviews, and articulate, courtroom-ready testimony. Each case is approached with the diligence and integrity it deserves, ensuring that every opinion is medically sound and legally defensible.


What sets Fenn Medical apart is the combination of advanced medical training, high-pressure clinical leadership, and military medical service. Our background includes managing critical cases in emergency departments, surgical first-assisting in complex procedures, and providing medical care in austere, deployed environments. This unique scope of experience allows us to offer more than textbook analysis—we deliver practical, firsthand insights into standards of care across a variety of medical settings. Attorneys can rely on Fenn Medical for expertise that is not only knowledgeable but also proven, reliable, and respected in both medical and legal arenas.

Fenn Medical provides thorough, unbiased medical record reviews to support accurate case assessments and expert opinions.

We evaluate clinical decisions and outcomes to determine adherence to the applicable standard of care, providing clear, evidence-based assessments

Provide expert witness testimony at depositions and trial, delivering clear, objective insights that withstand legal scrutiny.

 Expert witness services in Mesa, AZ

 A medical expert witness is a licensed healthcare professional who uses their clinical knowledge and experience to provide opinions on medical issues in legal cases. These experts help attorneys, judges, and juries understand complex medical concepts, procedures, and standards of care. Medical expert witnesses are commonly retained in cases involving malpractice, personal injury, wrongful death, workplace injury, and more. Their role is to offer unbiased, educated opinions on whether appropriate care was delivered and if any deviation from accepted medical standards occurred.

 Medical expert witness services typically include detailed medical record review, assessment of standard of care adherence, causation analysis, and consultation throughout the litigation process. Experts may prepare formal reports, affidavits of merit, and offer guidance during discovery. They are often called upon to give depositions and provide testimony in court. At Fenn Medical, we ensure all reports are written clearly and defensibly, backed by evidence, and tailored to the needs of both plaintiff and defense attorneys.

 When you engage Fenn Medical, you can expect responsive, professional service from the start. Each case begins with a thorough, impartial evaluation of records and relevant clinical data. Communication is timely, and expert opinions are presented in a straightforward manner that resonates with both legal and medical audiences. Whether the case involves a surgical complication, emergency room protocol, or trauma care standards, DJ Fenn, PA-C draws on real-world experience to deliver credible, courtroom-ready analysis and testimony.

Why utilize a Medical Expert Witness?

Medical expert witnesses play a crucial role in helping legal teams build strong, credible cases by translating complex medical information into clear, actionable insights. Their objective evaluations help determine whether the standard of care was met, identify potential negligence, and clarify causation—elements that are often central to medical malpractice, injury, or wrongful death claims.

By offering expert testimony rooted in clinical experience, medical experts help attorneys present compelling arguments, guide settlement negotiations, and provide authoritative support during trial. At Fenn Medical, our goal is to strengthen your case with accurate, reliable, and unbiased medical expertise.

Expert Witness Mesa Arizona
Expert Witness Mesa Arizona

Expert Witness in Personal Injury


In personal injury litigation, a medical expert witness is essential for evaluating the extent of injury, determining causation, and assessing whether medical treatment was appropriate and necessary. These cases often hinge on proving that an injury was directly caused by an accident or act of negligence—and that the resulting medical care was justified. At Fenn Medical, we provide objective, evidence-based evaluations that clarify injury severity, treatment timelines, and long-term impact. Our expert analysis supports attorneys in building strong, medically sound arguments that can withstand scrutiny during negotiation, deposition, or trial.

Why I’m the Right Expert Witness for Your Case


As a seasoned Physician Assistant with over a decade of diverse clinical experience, I offer comprehensive expert witness services that include detailed medical record reviews, objective standard of care evaluations, causation analysis, and clear, defensible expert opinions. I provide written reports, affidavits of merit, deposition testimony, and courtroom testimony tailored to the needs of both plaintiff and defense. My goal is to deliver accurate, evidence-based insights with clarity and integrity—ensuring that complex medical issues are effectively communicated and legally sound. Each case is approached with precision, timeliness, and the highest professional standards.


  • Objective Case Analysis
  • Personal Injury Analysis
  • Standard of Care Adherence
  • Medical Record Review
  • Chronology Preparation


  • Affidavit of Merit Preparation
  • Discovery Process Guidance
  • Expert Opinion Development
  • Depositions and Trial testimony
  • Plaintiff & Defense Cases