The Hidden Hurdle in Minnesota Medical Malpractice Lawsuits: Expert Affidavits

When medical care causes unexpected harm, patients and their families are often left with difficult questions: Was this simply an unfortunate outcome, or did a healthcare provider make a mistake? And if they did, what can be done about it?

For patients injured by potentially negligent medical care, pursuing a medical malpractice claim may be one option for seeking accountability and compensation. To succeed in these types of claims, an injured patient must generally prove that the healthcare provider failed to meet the applicable standard of care and that this failure caused or contributed to the patient’s injuries.

However, in Minnesota, even a potentially strong medical malpractice case can be dismissed before anyone ever gets to decide whether the healthcare provider was negligent.

Unlike many other civil lawsuits, medical malpractice cases require an additional procedural step: submitting expert affidavits. Because these claims often involve complex medical issues that require specialized knowledge, Minnesota law requires plaintiffs to obtain expert review and provide specific information to support their claims. These requirements are intended to help ensure medical malpractice lawsuits have a legitimate medical foundation before proceeding through litigation.

Understanding what these expert affidavits are, what they must contain, who must sign them, and when they must be served can make the difference between moving forward with a medical malpractice claim and losing the opportunity to pursue it altogether.

An expert affidavit is essentially a written statement used to establish that a medical malpractice claim has the appropriate foundation to proceed. Minnesota Statutes § 145.682 requires establishing this foundation at two stages of litigation through two separate affidavits. Each serves a different purpose: the first confirms that a qualified medical expert has reviewed the claim, while the second identifies the experts expected to testify at trial and explains the basis for their opinions.

The first is called the affidavit of expert review. Under Minn. Stat. § 145.682, subd. 2, the plaintiff's attorney must serve this affidavit along with the summons and complaint. Importantly, the attorney — not the medical expert — signs it. The affidavit certifies that the attorney reviewed the facts of the case with a qualified medical expert and that the expert believes a healthcare provider deviated from the applicable standard of care and caused the plaintiff's injury.

There is a limited exception that applies when expert review cannot reasonably be obtained before filing because of the applicable statute of limitations. In those situations, an attorney must serve the affidavit within 90 days after service of the summons and complaint. This exception is one of the many reasons having a knowledgeable attorney in your corner can make all the difference.

The second is called the affidavit identifying experts to be called at trial. Under Minn. Stat. § 145.682, subd. 4, this affidavit must be signed by each identified expert and the plaintiff's attorney. It must identify the experts expected to testify about the alleged malpractice or causation, describe the substance of their anticipated testimony, and summarize the grounds for their opinions. This second affidavit must generally be served within 180 days after commencement of discovery under Minnesota Rule of Civil Procedure 26.04(a).

Simply having a medical expert state that malpractice occurred is not enough. Minnesota courts require specific information explaining the basis of the expert's opinions.

In particular, the second affidavit must address three essential issues:

• Standard of care: What should the healthcare provider have done under the circumstances?
• Departure from the standard of care: What specific acts or omissions violated that standard?
• Causation: How did the provider's conduct cause or contribute to the patient's injuries?

In Teffeteller v. University of Minnesota, 645 N.W.2d 420, 428 (Minn. 2002), the Minnesota Supreme Court emphasized that expert disclosures must provide meaningful details about the standard of care, identify the alleged violations, and explain the connection between the provider's conduct and the patient's injuries.

In other words, the expert must explain what went wrong, what should have happened, and why the alleged mistake caused harm. Vague statements or general conclusions about negligence are not enough.

This is where Minnesota's expert affidavit requirements matter most.

Under Minn. Stat. § 145.682, subd. 6, failure to comply with the statutory requirements can result in mandatory dismissal with prejudice upon the defendant's motion.

The consequences depend on the type of deficiency. For example, failure to provide the initial affidavit within 60 days after a defendant's demand can result in dismissal. Failure to provide the second affidavit within the statutory deadline can also result in dismissal.

Even an affidavit served on time may be insufficient if it does not adequately explain the expert's opinions. However, Minnesota law provides a “safe harbor” opportunity to correct deficiencies in the second affidavit before the hearing on a properly filed dismissal motion. The defendant must identify the claimed deficiencies, and the hearing must be scheduled at least 45 days after service of the motion. To avoid dismissal on those grounds, the plaintiff must correct the deficiencies before the hearing.

Dismissal with prejudice is particularly serious because it generally means the plaintiff cannot simply correct the problem and bring the same claim again. An otherwise legitimate medical malpractice case can therefore be lost because of inadequate expert disclosures or missed deadlines.

If you believe you or a loved one has been injured because of medical negligence, one of the most important things you can do is act early and work with an attorney who understands Minnesota's medical malpractice laws and expert affidavit requirements.

Identifying the right medical expert, obtaining a thorough review of the medical records, preparing legally sufficient affidavits, and meeting every statutory deadline are not just procedural details—they are essential steps in building a medical malpractice claim. Waiting too long or relying on an incomplete expert review can jeopardize an otherwise viable case.

The good news is that these pitfalls can often be avoided with careful preparation and experienced legal guidance from the beginning.