To prove medical malpractice in Washington State, you must establish four things: the provider owed you a duty of care, they breached the accepted standard of care, that breach caused your injury, and you suffered measurable damages. In almost every case, this requires qualified expert medical testimony, and in some cases, multiple experts.
Medical malpractice cases are among the most complex personal injury claims you can bring. Unlike a car accident where fault is often clear, proving that a healthcare provider caused your harm requires medical knowledge, legal strategy, and expert testimony that goes far beyond what most people can navigate alone.
If you believe you were harmed by a doctor, hospital, or other provider in Spokane, understanding what you need to prove and how is the first step toward knowing whether you have a viable claim. At Gilbert Law Firm, our medical malpractice attorneys have helped Spokane families build and win medical malpractice cases. Here is what it takes.
The Four Elements You Must Prove
To succeed in a medical malpractice claim under Washington’s Medical Malpractice Act, you must establish four elements. Failing to prove even one of them means you walk away with nothing.
1. Duty of Care
The healthcare provider must have had a professional obligation to treat you. This is established by the existence of a provider-patient relationship. If a doctor agreed to treat you, they owed you a duty of care. This element is rarely disputed but must be established as the foundation of your claim.
2. Breach of the Standard of Care
This is the heart of every medical malpractice case. Under RCW 7.70.030, you must show the provider failed to follow the accepted standard of care, which is the level of treatment a reasonably competent provider in the same field would have given under the same or similar circumstances.
The standard of care is not perfection. Doctors are not required to achieve the best possible outcome. What they are required to do is exercise the same degree of skill, care, and judgment that a reasonably prudent provider in their specialty would exercise. When they fall short of that, they have breached the standard.
3. Causation
Proving breach is not enough. You must also show that the breach directly caused your injury, not your underlying condition, not a known risk of treatment, but the provider’s specific failure. This is often the most contested element in Washington malpractice cases, because defense experts will argue that your outcome would have been the same regardless of the alleged error.
Washington courts require expert medical testimony to establish causation in almost every malpractice case. As the Washington Supreme Court stated in Reese v. Stroh, “the general rule in Washington is that expert medical testimony on the issue of proximate cause is required in medical malpractice cases.”
4. Damages
Finally, you must show that the breach caused measurable harm. Under Washington law, recoverable damages include:
- Medical expenses: past and future treatment costs caused by the malpractice
- Lost wages and reduced earning capacity
- Pain and suffering and emotional distress
- Permanent disability or disfigurement
Washington repealed its statutory cap on non-economic damages, meaning a jury can award the full amount your circumstances warrant, including for pain, suffering, and loss of enjoyment of life, with no legislated ceiling.
The Expert Witness Requirement in Washington
Expert testimony is a critical component in Washington medical malpractice cases. Under Washington Rules of Evidence Rule 702, expert witnesses may offer opinions on key issues of liability and damages when their specialized knowledge will assist the jury in understanding the evidence.
In practice, this means your case will almost always require at least one medical expert and often several to testify on:
- What the applicable standard of care required in your situation
- How the defendant’s conduct fell short of that standard
- How that failure directly caused your injury and damages
Your expert must typically be a licensed provider in the same or a closely related specialty as the defendant. Washington courts have consistently held that non-physicians cannot testify as experts regarding the proper standard of care for a physician.
The “Battle of Experts”
Because both sides retain their own medical experts, malpractice trials in Washington are often described as a “battle of experts.” The defense will present experts who argue the provider met the standard of care, that your injury was caused by your underlying condition, or that the outcome would have been the same regardless of the alleged error.
Your attorney’s ability to select, prepare, and present credible expert witnesses, and to effectively cross-examine the defense’s experts, is often the deciding factor in the outcome of your case.
When Expert Testimony Is Not Required
There is a narrow exception to the benefit of expert witnesses in Washington, particularly in cases where the negligence is so obvious that a layperson could understand it without medical training. These are sometimes called “never events” and include situations like:
- Operating on the wrong body part or the wrong patient
- Leaving a surgical instrument inside a patient after surgery
- Amputating the wrong limb
In these cases, the negligence speaks for itself, and expert testimony on the standard of care may not be required. However, expert testimony on causation and damages may still be necessary even in never-event cases.
What Happened to the Certificate of Merit
You may have heard that Washington once required a “certificate of merit,” which was a statement from a medical expert filed alongside every malpractice lawsuit confirming a reasonable probability that the provider’s conduct fell below the standard of care.
The Washington Supreme Court struck down the certificate of merit requirement as an unconstitutional violation of the separation of powers, finding that it improperly regulated court procedure through legislation.
Washington effectively has no certificate of merit requirement today, though the practical reality is that expert review of your case before filing remains essential to building a winning claim.
What Evidence Supports a Medical Malpractice Claim in Washington?
Beyond expert testimony, building a strong malpractice case requires gathering and preserving the right evidence:
- Medical records: Complete records from every provider involved in your care, including hospitals, clinics, specialists, and pharmacies
- Physician notes and nursing logs: Contemporaneous documentation of what was observed, ordered, and done
- Imaging and lab results: X-rays, MRIs, blood work, and other diagnostic results that may show what should have been identified or acted upon
- Incident reports: Hospitals are required to document adverse events and may have internal reports relevant to your claim
- Billing records: Document the financial impact of the malpractice on your care
- Your own documentation: A personal journal tracking symptoms, limitations, and the impact on your daily life can be powerful evidence of non-economic damages
Medical records can be amended, lost, or become harder to obtain over time. The sooner you retain an attorney, the better positioned you are to secure and preserve this evidence.
Talk to a Spokane Medical Malpractice Lawyer at Gilbert Law Firm
Proving medical malpractice in Washington is genuinely difficult, and the healthcare providers and hospitals you’re up against will have experienced defense teams working against you from the start. You deserve the same level of preparation and advocacy on your side.
At Gilbert Law Firm, we don’t take cases we don’t believe in, and when we do take yours, we fight for everything you’re owed. Contact us today at (509) 321-0750 for a free consultation.
Frequently Asked Questions About Proving Medical Malpractice in Washington
1. Do I always need an expert witness to prove medical malpractice in Washington?
In almost every case, yes. Washington courts require expert medical testimony to establish the standard of care, how it was breached, and how that breach caused your injury. The only exception is for cases where the negligence is so obvious (such as operating on the wrong limb) that a layperson could understand it without medical training. Even in those cases, expert testimony on causation and damages is usually still needed. Gilbert Law Firm works with qualified medical experts to build every case we take on.
2. What is the “standard of care,” and who decides what it is?
The standard of care is the level of treatment a reasonably competent provider in the same specialty would give under the same or similar circumstances. It is established in court through expert testimony from a licensed provider in the same or a closely related field. The standard is what a competent peer would have done.
3. How do I prove the provider’s mistake caused my injury?
Your attorney will retain a medical expert who can testify specifically to how the provider’s failure caused your harm, as distinct from your pre-existing condition or the natural progression of your illness. The defense will present their own expert arguing the opposite. The strength of your expert’s testimony and your attorney’s ability to challenge the defense’s expert are often decisive.
4. What damages can I recover in a Washington medical malpractice case?
You may recover medical expenses, future treatment costs, lost wages, reduced earning capacity, pain and suffering, emotional distress, and permanent disability damages. Washington places no cap on non-economic damages, meaning a jury can award the full amount your circumstances warrant.
5. What if the hospital says the bad outcome was a known risk I consented to?
Consent is one of the most common defenses in malpractice cases, but consenting to a known risk is not the same as consenting to negligent care. If the provider’s technique, judgment, or post-procedure care fell below the standard, regardless of what risks you were told about, you may still have a valid claim.
6. Can I file a malpractice claim against a hospital as well as the individual doctor?
Yes. In Washington, any healthcare provider who owed you a duty of care and failed to meet the standard can be held liable, including hospitals and health systems as institutions. If a hospital’s policies, staffing decisions, or failure to supervise contributed to your harm, the hospital itself may share liability alongside the individual provider. Multiple defendants are common in serious malpractice cases.
