Board-Certified Emergency Physician · Nationwide
Emergency medicine. Evaluated as it was practiced.
Emergency medicine decisions are made under uncertainty, evolving information, and time pressure. My opinions evaluate what a reasonably prudent emergency physician would have done at the time, not with hindsight.
Andrew Tisser, DO
Clinical Practice
Record Analysis
Emergency medicine decisions happen under uncertainty, time pressure, and incomplete information. Dr. Tisser evaluates those decisions on what a reasonable physician would have done at the time, never with the clarity of hindsight.
Clinical expertise and analytical discipline in one expert.
Each point below is a concrete, verifiable credential or practice, explained in plain terms for counsel who do not work with these certifications every day.
Board-certified and actively practicing
A board-certified emergency physician who still works clinically. Opinions reflect current emergency department practice, not academic theory disconnected from the floor.
Certified Physician Executive (CPE)
A leadership credential for physicians, awarded after formal training and examination in medical management, quality, and administration. It reflects experience running clinical operations, not only treating patients.
Physician advisor certified (CHCQM-PHYADV)
A certification in health care quality and utilization review. In plain terms, it reflects daily, structured analysis of medical records against accepted guidelines, the same discipline applied to case review.
Former Associate Chair, Emergency Medicine
Helped lead emergency department operations, quality, and clinical standards. That vantage point is what makes systems, boarding, triage, and supervision questions clear.
Complex records analyzed daily
Physician advisor and health plan medical director experience means reading complex medical records every day. This strengthens record review; it is analytical experience, not clinical emergency medicine practice.
Objective, plaintiff and defense
Retained by both plaintiff and defense counsel. The standard of care does not change with the retaining party, and that consistency is what makes an opinion credible.
Clear written reports
Well-organized opinions that state the applicable standard of care, the relevant facts, and the reasoning that connects them, designed to withstand careful scrutiny.
Responsive communication
Prompt replies, honest timelines, and early, candid assessments so counsel can make decisions before committing significant resources.
Support at every stage of the case.
From an early merit screen to trial testimony, engagement is scoped to what the matter actually needs.
Case Screening & Merit Review
An early, candid assessment of whether the emergency care met the standard of care, before you commit resources to a case.
Medical Record Analysis
Detailed review of the full chart: triage, nursing notes, physician documentation, imaging, labs, timestamps, and disposition.
Written Expert Reports
Clear, defensible written opinions that state the standard of care, the facts, and the reasoning that connects them.
Deposition Testimony
Clear, objective testimony that stays anchored to the evidence and is designed to withstand careful scrutiny.
Trial Testimony
Testimony that explains complex emergency medicine to a jury in plain, credible language.
Standard-of-Care Consultation
Consultation on emergency department decision-making, triage, disposition, documentation, and systems issues.
Emergency medicine expertise from the bedside. Analytical rigor from the record.
The emergency medicine opinions come from more than a decade of clinical practice across academic, community, rural, critical access, and trauma settings. Separately, work as a physician advisor and medical director built a daily discipline of analyzing complex medical records, interpreting guidelines, and writing detailed determinations.
That second body of work is never presented as emergency medicine practice; it is what makes the medical record review unusually thorough.
Clinical practice
The source of emergency medicine expertise: triage, resuscitation, diagnosis, and disposition made in real time.
Physician advisor & medical director
The source of analytical discipline: daily record analysis, guideline interpretation, and written, evidence-based determinations.
Clinical and operational areas reviewed.
Emergency medicine spans a wide range of high-acuity presentations and department-level systems issues.
A clear path from first contact to testimony.
Initial Contact
Send a brief description of the matter and jurisdiction. I confirm availability and screen for conflicts, typically within one business day.
Preliminary Review
After a signed engagement, I review the core records and provide an honest, verbal assessment of the merits.
Formal Analysis
I complete a thorough record analysis and, when appropriate, a written report stating the standard of care and my opinions.
Testimony
I prepare for and provide deposition and trial testimony that stays clear, measured, and grounded in the evidence.
In brief
Dr. Andrew Tisser is a board-certified emergency physician and expert witness who reviews emergency medicine malpractice, wrongful death, and personal injury matters for plaintiff and defense counsel nationwide. He provides case screening, medical record analysis, written reports, and deposition and trial testimony, evaluating care against the standard at the time it was delivered.
What attorneys ask first.
Who is Dr. Andrew Tisser?
Dr. Andrew Tisser is a board-certified emergency physician with more than ten years of clinical practice across academic, community, rural, critical access, and trauma settings. He serves as an emergency medicine expert witness for attorneys nationwide and has been retained on both plaintiff and defense matters.
Why should an attorney retain Dr. Tisser?
He combines active emergency medicine expertise with the analytical discipline of a physician executive. His work is objective and evidence-driven. He evaluates care against the standard of care at the time it was delivered, not with the benefit of hindsight. Attorneys receive clear opinions designed to withstand careful scrutiny.
What types of cases does he review?
Emergency medicine matters including failure to diagnose, sepsis, stroke, acute coronary syndrome, pulmonary embolism, trauma, abdominal and pediatric emergencies, triage, disposition, documentation, boarding, APP supervision, EMTALA, and systems failures, spanning medical negligence, wrongful death, and personal injury.
Can Dr. Tisser testify nationwide?
Yes. Dr. Tisser is available nationwide for emergency medicine expert witness consultation and testimony, and is licensed in 12 states. Serving as an expert witness does not require licensure in the state where the case is venued, though specific court and jurisdictional requirements are confirmed for each matter.
How quickly are cases reviewed?
Initial inquiries typically receive a reply within one business day. Turnaround for record review depends on case volume and complexity, and a realistic timeline is agreed on before work begins.
Considering an emergency medicine expert?
Send a brief summary of the matter and jurisdiction. You'll receive a candid, confidential assessment of the merits, usually within one business day.