Yes, a judge can order a psychological evaluation, but only when a person’s mental or emotional state is genuinely at issue in the case. In federal civil matters, Rule 35 of the Federal Rules of Civil Procedure requires that the mental condition be “in controversy” and that the requesting party show “good cause” for the exam.1Legal Information Institute. Federal Rules of Civil Procedure Rule 35 – Physical and Mental Examinations In criminal cases, separate federal statutes let judges order evaluations when a defendant’s competency to stand trial or sanity at the time of the offense is in question. Refusing a valid order can cost you evidence, claims, or the case itself.
When a Judge Can Order One
A judge cannot order a psychological evaluation just because someone asks. In civil cases, Rule 35 sets two requirements that must both be met: the person’s mental condition must be a real, disputed element of the case, and the party requesting the exam must show a genuine need for it beyond ordinary relevance.1Legal Information Institute. Federal Rules of Civil Procedure Rule 35 – Physical and Mental Examinations
The Supreme Court made clear in Schlagenhauf v. Holder that vague allegations are not enough. A party who has not personally raised their mental condition as part of a claim or defense cannot be subjected to a sweeping examination based on general accusations. Good cause demands a stronger showing than mere relevance, because relevance is already required for all discovery.2Justia Law. Schlagenhauf v Holder, 379 US 104 (1964)
Criminal cases run on a different track. If there is reasonable cause to believe a defendant cannot understand the charges or work with counsel, the court must order a competency evaluation before the case moves forward.3Office of the Law Revision Counsel. 18 US Code 4241 – Determination of Mental Competency to Stand Trial
The Cases Where This Comes Up
Child Custody
Family courts order psychological evaluations more often than almost any other court. When parents cannot agree on custody and one raises concerns about the other’s mental health or parenting ability, judges frequently order evaluations to help decide what serves the child’s best interests. The evaluator assesses each parent’s psychological functioning, parenting capacity, and ability to provide a stable home. Roughly 90% of custody arrangements are settled by agreement, so the cases that reach a judge tend to be the ones where expert insight matters most.
Criminal Competency
Competency looks at the defendant right now: can this person understand the charges, grasp the potential consequences, and consult meaningfully with their attorney? The standard comes from Dusky v. United States, which requires a “sufficient present ability to consult with his lawyer with a reasonable degree of rational understanding” and a “rational as well as factual understanding of the proceedings.”4Legal Information Institute. US Constitution Annotated – Competency for Trial
A finding of incompetency stops the criminal case. Under federal law, the defendant may be hospitalized for up to four months to determine whether competency can be restored, and longer if restoration appears likely. If it cannot, civil commitment proceedings may replace prosecution.3Office of the Law Revision Counsel. 18 US Code 4241 – Determination of Mental Competency to Stand Trial
Insanity Defense
An insanity evaluation is a different question entirely. Instead of asking whether the defendant can participate in the trial today, it asks whether the defendant understood what they were doing at the time of the offense. Under federal law, insanity is an affirmative defense, and the defendant must prove by clear and convincing evidence that a severe mental disease or defect made them unable to appreciate the nature, quality, or wrongfulness of their actions when the crime occurred.5Office of the Law Revision Counsel. 18 US Code 17 – Insanity Defense Because the burden sits on the defendant, both sides usually retain their own experts.
Personal Injury Claims Involving Emotional Harm
If you sue for psychological harm such as PTSD or severe anxiety, you have placed your mental condition directly at issue. That is the clearest possible trigger under Rule 35, and the defense will have strong grounds to request an independent psychological evaluation to test the severity of the claimed harm and whether the incident actually caused it.1Legal Information Institute. Federal Rules of Civil Procedure Rule 35 – Physical and Mental Examinations Many plaintiffs do not realize that claiming emotional damages opens this door.
Guardianship and Conservatorship
In probate court, evaluations help judges decide whether someone can still manage their own personal or financial affairs. When a family member petitions for guardianship, the court will typically order an assessment of the individual’s cognitive abilities, daily functioning, and capacity to make consistent decisions about health, finances, and living arrangements.
What the Order Itself Must Say
The judge’s power is not open-ended. When a court orders a psychological evaluation, the order must spell out the time, place, manner, and scope of the exam, along with who will perform it.1Legal Information Institute. Federal Rules of Civil Procedure Rule 35 – Physical and Mental Examinations An evaluator who ranges beyond what the order authorizes is overstepping, and your attorney can push back.
What Actually Happens in an Evaluation
The evaluation is not a single test or a brief conversation. A licensed psychologist or psychiatrist typically conducts clinical interviews covering personal history, current symptoms, and the issues relevant to the legal dispute. Standardized tests are often administered to measure personality traits, cognitive functioning, or specific conditions. The evaluator also reviews medical records, prior treatment records, and legal filings.
Turnaround varies. Straightforward evaluations may finish in a few weeks. More complex forensic evaluations commonly take six to eight weeks from the court order to the final written report. Expedited exams can sometimes wrap up within 30 days, though evaluators are reluctant to compress timelines if it would compromise thoroughness.
Your Rights and a Trap to Watch For
Being ordered to undergo an evaluation does not mean you lose all control. The order defines the boundaries, and after the exam you can request a copy of the evaluator’s report. The party who requested the evaluation must deliver the report on request. It must be in writing and must set out the findings in detail, including diagnoses, conclusions, and all test results.1Legal Information Institute. Federal Rules of Civil Procedure Rule 35 – Physical and Mental Examinations
There is a significant trade-off here. Requesting the report or deposing the examiner waives any doctor-patient or psychotherapist-patient privilege you would otherwise have for exams of the same condition. That waiver reaches beyond the court-ordered evaluation to all examinations of the same condition, in the current case and in any other case involving the same dispute.1Legal Information Institute. Federal Rules of Civil Procedure Rule 35 – Physical and Mental Examinations In practice, if you request the report, the opposing party can then demand records from your own treating therapist or psychiatrist. Weigh that with your attorney before asking.
What It Costs and Who Pays
Court-ordered evaluations are not free. A standard mental health assessment generally runs $600 to $1,500, and complex forensic or custody evaluations often cost significantly more depending on the number of sessions, testing involved, and length of the written report.
Who pays depends on the circumstances. Sometimes the person being evaluated is responsible. Sometimes the requesting party pays, particularly when a defendant asks for an independent exam of a plaintiff. Courts sometimes appoint and pay for the evaluator directly, especially in criminal cases or where a party shows financial hardship. If you cannot afford the cost, you can ask the court for assistance. The judge has discretion to allocate the expense.
What Happens If You Refuse
Ignoring a court-ordered evaluation is one of the fastest ways to damage your case. Refusal is treated as a discovery violation, and judges have real enforcement power under Rule 37. Available sanctions include:
- Barring the refusing party from introducing any evidence about their own mental condition, which effectively guts any claim or defense built on psychological harm.
- Directing the jury to treat the disputed facts as established against the refusing party.
- Striking the refusing party’s claims or defenses, in whole or in part.
- Dismissing the case outright or entering a default judgment against the noncompliant party.
Any of these can be paired with an order requiring the refusing party to pay the other side’s attorney fees and costs caused by the noncompliance.6Legal Information Institute. Federal Rules of Civil Procedure Rule 37 – Failure to Make Disclosures or to Cooperate in Discovery; Sanctions Courts usually start with lesser sanctions and escalate, but judges facing outright defiance have skipped straight to dismissal. If you have concerns about the scope of the exam or the evaluator’s qualifications, raise them through your attorney before the deadline. Do not simply skip the appointment.