When it comes to expert witnesses in medical malpractice cases in Washington State, the answer is almost always yes, you need one. Washington courts have established that expert testimony is required to prove both the standard of care and causation in nearly all malpractice cases. The only exception is for cases involving obvious negligence that a layperson could understand without medical training.
If you’ve been harmed by a healthcare provider and are considering a medical malpractice claim, one of the first practical questions you’ll face is whether you need a medical expert, and if so, what kind. The short answer is almost certainly yes. Once you know exactly why, what your expert needs to do, and what happens when both sides have experts, it’s easier to understand what your case will involve.
At Gilbert Law Firm, our medical malpractice attorneys work closely with qualified medical experts to build strong malpractice cases for clients in Spokane and across Washington State. Here is what you need to know.
Why Expert Testimony Is Required in Washington Malpractice Cases
Medical malpractice cases turn on technical medical questions that go far beyond what most jurors know from everyday experience. Did the doctor’s decision to delay surgery fall below the standard of care for a general surgeon? Would a competent radiologist have identified the abnormality on that scan? These are not questions a jury can answer without expert guidance.
The Washington Supreme Court has consistently held that expert medical testimony is generally necessary to establish both the standard of care and causation in malpractice cases.
Under Washington Rules of Evidence Rule 702, a qualified expert witness may offer opinions on key issues of liability and damages when their specialized knowledge will assist the jury in understanding the evidence. Without that testimony, your case almost certainly cannot succeed.
What Does Your Expert Need to Prove?
In a Washington medical malpractice case, your expert witness typically needs to establish three things:
1. The applicable standard of care
Your expert must explain what a reasonably competent provider in the same field would have done under the same or similar circumstances. This is about what a careful, similarly trained peer would have done. The expert must be familiar with that standard, either through active practice in the same specialty or through demonstrated knowledge of the field.
2. How the defendant breached that standard
Your expert must specifically explain how the defendant’s conduct fell short of what was required, not just that something went wrong, but what the provider should have done differently and why their actual conduct was inadequate.
3. How the breach caused your injury
Causation is often the most contested element in Washington malpractice cases. Your expert must explain the direct connection between the provider’s failure and the specific harm you suffered, ruling out your underlying condition or other factors as the cause.
The Washington Supreme Court has stated that “expert medical testimony on the issue of proximate cause is required in medical malpractice cases” as a general rule.
Who Qualifies as an Expert Witness in Washington?
Washington does not have a specific statute setting out minimum qualifications for medical expert witnesses. The certificate of merit requirement that once attempted to regulate this was struck down as unconstitutional by the Washington Supreme Court. Instead, qualification is evaluated by the trial court on a case-by-case basis.
In practice, Washington courts have established the following guidance:
- Same or similar specialty: Your expert should generally practice in the same specialty as the defendant provider. The Washington Supreme Court has never accepted a rule that allows a non-physician to testify about the proper standard of care for a physician.
- Licensed to practice medicine: While not an absolute requirement, being a licensed physician is an important factor the court will weigh in determining whether an expert is qualified.
- ARNPs can testify on causation: In Frausto v. Yakima HMA, LLC (2017), the Washington Supreme Court held that Advanced Registered Nurse Practitioners may provide expert causation testimony in appropriate cases.
- Familiarity with Washington’s standard: Your expert must be able to demonstrate knowledge of the standard of care applicable in Washington, either because they practice here or because the standard is consistent with a national standard they can establish.
What to Expect at Trial
Because both sides retain their own medical experts, Washington malpractice trials are frequently described as a “battle of experts.” The defense will present its own physicians who argue the provider met the standard of care, that your injury was caused by your underlying condition rather than the provider’s conduct, or that the outcome would have been the same regardless of the alleged error.
The strength of your attorney’s expert, including their credentials, the clarity of their explanation, and their credibility under cross-examination, often determines the outcome. So does your attorney’s ability to effectively challenge the defense’s expert.
How Gilbert Law Firm Approaches Expert Witnesses
Finding the right expert is not as simple as finding a doctor willing to testify. Your expert needs to be credible, articulate, genuinely qualified in the relevant specialty, and able to withstand aggressive cross-examination from experienced defense attorneys. The quality of your expert directly affects what the defense is willing to offer in settlement and what a jury is likely to believe at trial.
At Gilbert Law Firm, our medical malpractice attorneys work closely with qualified medical experts to establish the standard of care and demonstrate exactly where your provider fell short. Bill Gilbert has served as lead counsel in verdicts recognized among the nation’s top 100 by The National Law Journal. That level of courtroom experience means we know how to present expert testimony effectively and how to challenge the defense’s experts when they overreach.
Contact Gilbert Law Firm About Your Medical Malpractice Case in Spokane
If you believe a healthcare provider harmed you, the question of whether you need an expert witness is one your attorney should help you answer based on the specific facts of your case. At Gilbert Law Firm, we review every case honestly, including telling you if we don’t think the expert evidence supports a viable claim. Contact us today for a free consultation.
Frequently Asked Questions About Expert Witnesses in Washington Medical Malpractice Cases
1. Do I need an expert witness to file a medical malpractice lawsuit in Washington?
You don’t need one to file. Washington’s certificate of merit requirement was struck down as unconstitutional in 2009, but you almost certainly need one to win. Washington courts have consistently held that expert testimony is required to establish both the standard of care and causation in nearly all malpractice cases. Without a qualified expert, your case is unlikely to survive a motion for summary judgment. Contact Gilbert Law Firm to discuss what your case needs.
2. What specialty does my expert witness need to be in?
Generally, the same or a closely related specialty as the defendant provider. Washington courts have consistently held that non-physicians cannot testify about the proper standard of care for a physician, and the closer your expert’s specialty is to the defendant’s, the stronger their testimony will be. A cardiologist testifying about surgical technique, for example, would face significant challenges to their qualifications.
3. Can a nurse be an expert witness in a Washington malpractice case?
It depends on what they are testifying about. The Washington Supreme Court held in Frausto that Advanced Registered Nurse Practitioners can provide expert causation testimony in appropriate cases. However, a nurse generally cannot testify about the physician’s standard of care. If your case involves nursing negligence specifically, a qualified nursing expert may be appropriate for standard of care testimony.
4. What is the “battle of experts” in a medical malpractice trial?
Both sides retain their own medical experts who offer competing opinions on the standard of care, whether it was breached, and whether the breach caused your injury. The defense’s experts will argue the provider acted appropriately or that your injury was caused by your underlying condition. The strength of your expert’s testimony and your attorney’s ability to challenge the defense’s expert is often the deciding factor at trial. See our blog on how to prove medical malpractice in Washington for more on what this looks like in practice.
5. Are there cases where I don’t need an expert witness?
Yes, but they are rare. If the negligence is so obvious that a layperson could understand it without medical training, expert testimony on the standard of care may not be required. Examples include operating on the wrong limb or leaving a surgical instrument inside a patient. Even in these cases, expert testimony on causation and damages is usually still needed. If you think your case might fall into this category, Gilbert Law Firm can evaluate the specific facts.
6. How early in my case do I need to find an expert?
Washington courts set expert witness disclosure deadlines in their scheduling orders, typically requiring disclosure months before trial. Beyond the procedural deadline, expert review takes time. Your expert needs adequate time to review medical records, form opinions, and prepare testimony. Starting the expert search early also gives your attorney time to find the most credible and qualified expert available for your specific case.
7. How does Gilbert Law Firm find expert witnesses for malpractice cases?
We work with qualified medical experts across the specialties most commonly involved in Washington malpractice claims. Our attorneys, including Bill Gilbert, who has served as lead counsel in verdicts recognized among the nation’s top 100, know what it takes to present expert testimony effectively and how to challenge the defense’s experts when their opinions don’t hold up to scrutiny. Contact us to discuss your case today.
