CROSSOVER: Mandamus Opens the Door to Out-of-State Experts: Discovery Cannot Be Barred on an Unsupported Texas-License Requirement

In re Adelide Ybarra and Leon Barba, 03-26-00497-CV, September 29, 2026.

On appeal from Probate Court No. 2 of Travis County

Synopsis

Texas Rule of Civil Procedure 192.3(e) permits discovery from a disclosed testifying expert even when the expert may later be excluded from testifying at trial. A trial court therefore may not prohibit the expert’s deposition solely because the expert lacks a Texas medical license or because the opinions may ultimately be inadmissible, and mandamus is available when an appeal cannot adequately remedy the lost discovery.

Relevance to Family Law

The ruling has direct application to divorce, custody, and marital-property litigation involving physicians, psychologists, forensic accountants, business-valuation professionals, tracing experts, and other specialists located outside Texas. A party may challenge an expert’s qualifications or the admissibility of the expert’s opinions, but a potential merits-stage exclusion ordinarily does not eliminate the opposing party’s right to take—or the designating party’s right to preserve—the disclosed expert’s deposition under Rule 192.3(e). Family-law courts should address discoverability, expert qualification, and admissibility as distinct questions rather than using a disputed qualification requirement to foreclose expert discovery altogether.

Family Law Crossover

The procedural mechanism is mandamus review of an order categorically barring the deposition of a disclosed testifying expert. Rule 192.3(e) makes a testifying expert’s opinions, mental impressions, factual bases, and related expert materials discoverable; whether those opinions will be admissible at trial is a separate inquiry ordinarily resolved through a qualification or admissibility challenge.

In a Texas family-law matter, the issue may arise when a party designates an out-of-state psychiatrist in a conservatorship dispute, a physician addressing a spouse’s medical condition, a psychologist offering opinions relevant to possession restrictions, or an accountant valuing an interstate business. The opposing party may contend that the expert lacks a Texas occupational license or otherwise fails to satisfy an admissibility requirement. Under Ybarra, such a contention does not, without supporting law and a valid discovery ground, authorize the court to prohibit the deposition of an otherwise disclosed testifying expert. If the order prevents development or preservation of expert proof in a way that cannot be reconstructed after final judgment, mandamus may be the appropriate remedy.

Case Summary

Fact Summary

The underlying proceeding was a Travis County will contest involving competing instruments purportedly executed in 2012, 2018, and 2022. Adelide Ybarra and Leon Barba opposed the application to probate the 2022 will and sought to present evidence concerning the decedent’s cognitive abilities and understanding at the time of that instrument.

Ybarra and Barba disclosed Dr. Keith Klein, a California physician, as a medical expert. Dr. Klein was expected to offer opinions relevant to the decedent’s cognitive condition and testamentary capacity. The relators initially noticed his deposition by remote electronic means and stated that they intended to use the deposition at trial. The real party in interest moved to quash the deposition and requested a protective order.

At an initial hearing, the trial court denied the request to prohibit the deposition but indicated that testimony at the eventual trial would need to be presented live and in person. Counsel represented at that time that Dr. Klein would appear personally. The parties’ dispute continued, however, and the relators later noticed another deposition of Dr. Klein, again stating that the testimony could be used at trial or for any other purpose authorized by Texas law.

At a subsequent hearing, the trial court focused on whether Dr. Klein held a Texas medical license and whether a physician without such a license could offer expert testimony in a Texas will contest. The relators stated that they then intended to use Dr. Klein’s deposition testimony at trial in place of his live appearance. The trial court granted the motion to quash and entered a protective order because Dr. Klein lacked a Texas medical license and, in the court’s view, therefore could not testify at trial.

A separate dispute concerned the relators’ effort to place the 2018 will back at issue. They electronically filed the pertinent pleading on February 11, 2026. The trial court did not sign its docket-control order until February 17, but that order purported to impose a February 1 deadline for amended pleadings. The court struck the February 11 pleading and later denied leave to file it, effectively applying the later-signed deadline retroactively.

Ybarra and Barba sought mandamus relief from both the pleading rulings and the order preventing Dr. Klein’s deposition. They also raised a due-process complaint concerning the trial court’s position that testimony not given live and in person would be inadmissible.

Issues Decided

Whether Rule 192.3(e) permitted the deposition of a disclosed medical expert even if the expert might ultimately be disqualified from testifying at trial.
Whether the absence of a Texas medical license, without supporting legal authority establishing such a requirement, justified an order quashing the expert’s deposition and prohibiting it through a protective order.
Whether an ordinary appeal provided an adequate remedy for the loss of the expert discovery.
Whether the trial court could strike a pleading based on a docket-control deadline imposed after the pleading had already been filed.
Whether the relators preserved their due-process challenge to the trial court’s stated requirement that trial testimony be presented live and in person.

Rules Applied

Texas Rule of Civil Procedure 192.3(e): The rule authorizes discovery concerning a testifying expert’s identity, subject matter of testimony, mental impressions and opinions, facts known to the expert, and the bases for the expert’s opinions. Discoverability does not depend on a prior determination that every disclosed opinion will be admissible at trial.
Mandamus standard: Mandamus relief requires a clear abuse of discretion and the absence of an adequate remedy by appeal. The adequacy inquiry is practical and circumstance-specific, particularly when a discovery order prevents a party from developing or presenting a claim or defense.
Distinction between discovery and admissibility: Evidence may be discoverable even though it is ultimately excluded at trial. Potential inadmissibility, standing alone, does not place disclosed expert testimony beyond the scope of Rule 192.3(e).
Docket-control orders and pleading deadlines: A trial court may manage its docket and enforce valid pretrial deadlines, but it may not treat a pleading as untimely under a deadline that did not exist when the pleading was tendered and filed.
Preservation of error: A party generally must present a complaint to the trial court in a timely and specific manner before seeking appellate or mandamus relief on that ground.

Application

The Third Court of Appeals began with the undisputed proposition that Dr. Klein was a disclosed testifying expert and that his expert opinions fell within Rule 192.3(e). The trial court did not prohibit the deposition because the requested discovery was irrelevant, disproportionate, privileged, or outside the permissible scope of expert discovery. Instead, it prevented the deposition because Dr. Klein lacked a Texas medical license and therefore supposedly could not testify at trial.

That reasoning improperly merged two separate stages of litigation. Rule 192.3(e) governs what may be discovered from a testifying expert. A later qualification or admissibility inquiry determines whether the expert may offer particular opinions at trial. Even if an expert is eventually excluded, the disclosed expert’s testimony remains discoverable while the designation is operative. The possibility of exclusion therefore did not authorize a blanket prohibition against taking the deposition.

The court also found no legal support for the proposition that a physician must possess a Texas medical license to provide the contemplated expert opinions in this will contest. The asserted licensing requirement consequently could not sustain either the order quashing the deposition or the protective order. The appellate court did not need to decide definitively whether every opinion Dr. Klein might offer would be admissible. The controlling point was that possible inadmissibility did not erase the relators’ discovery rights.

Mandamus was appropriate because an appeal after final judgment would not adequately restore the opportunity to obtain and preserve the expert testimony. Once the trial proceeded without the discovery, the resulting impairment of the relators’ evidentiary presentation could not necessarily be cured by reversal and retrial.

The trial court’s handling of the 2018-will pleading presented a similar timing problem. The relators filed the pleading on February 11. The court signed the docket-control order six days later, even though the order stated a February 1 deadline. Because no enforceable February 1 deadline governed the pleading when it was filed, the trial court could not retroactively use that deadline to strike it. The subsequent denial of leave did not cure the error.

The court did not reach the merits of the relators’ due-process challenge to the requirement of live, in-person trial testimony. That issue had not been timely presented to the trial court and was therefore not preserved for mandamus review.

Holding

A disclosed testifying expert’s testimony is discoverable under Texas Rule of Civil Procedure 192.3(e), even if the expert may ultimately be disqualified or the expert’s opinions may be excluded at trial. The trial court abused its discretion by prohibiting Dr. Klein’s deposition solely because he lacked a Texas medical license and his testimony was thought to be inadmissible.

The court further held that the relators lacked an adequate remedy by appeal from the order preventing the deposition. Because the order foreclosed the development and preservation of material expert evidence, mandamus relief was available.

The trial court also abused its discretion by striking the pleading concerning the 2018 will based on a docket-control deadline that was imposed only after the pleading had been filed. A subsequently signed scheduling order could not retroactively make the earlier filing untimely.

The court declined to decide the due-process challenge concerning the requirement of live, in-person trial testimony because the relators had not timely presented that complaint to the trial court. The petition for writ of mandamus was therefore conditionally granted in part and denied in part.

Practical Application

Treat discovery and admissibility as separate procedural questions. If an opposing expert has been designated to testify, counsel generally may obtain the discovery authorized by Rule 192.3(e) while separately pursuing a motion to exclude. A qualification objection should not be presented as automatically defeating discoverability.

Do not assume an out-of-state license creates a categorical bar. Family-law litigation frequently requires experts with multistate practices or specialized experience unavailable locally. Before asserting that Texas licensure is mandatory, identify the statute, rule, or controlling authority that makes the license a condition of giving the specific opinions at issue. Distinguish the regulation of professional practice from the evidentiary qualifications necessary to testify as an expert.

Use the decision in custody and conservatorship cases. A non-Texas psychiatrist, psychologist, physician, or other specialist may possess relevant expertise concerning a parent’s condition, a child’s needs, or records generated outside Texas. A party may contest whether the expert satisfies Texas Rule of Evidence 702 or any applicable statutory standard, but the contest ordinarily does not justify barring the expert’s deposition.

Apply the same analysis to property experts. Divorce cases may involve out-of-state valuation professionals, forensic accountants, compensation experts, mineral appraisers, or specialists in foreign business operations. The absence of a Texas professional credential should not be treated as a substitute for a developed admissibility analysis.

Build a mandamus record immediately. When an order prevents expert discovery, ensure that the record contains the expert designation, deposition notice, motion to quash, protective-order request, hearing transcript, written ruling, and explanation of why the testimony matters. The petition should demonstrate not merely legal error, but why an appeal after judgment cannot restore the lost discovery or evidentiary opportunity.

Preserve every distinct complaint. An objection to an expert-deposition prohibition does not necessarily preserve a separate complaint about requiring live testimony at trial. Present each due-process, discovery, evidentiary, and procedural objection expressly to the trial court and obtain a ruling.

Monitor the effective date of scheduling orders. A proposed or unsigned docket-control order is not necessarily an operative order. When a filing deadline is disputed, preserve the filing confirmation, clerk’s file stamp, date of signature, date of notice, and any record showing the status of the proposed order.

Checklists

Taking the Deposition of an Out-of-State Expert

Confirm that the expert has been designated as a testifying expert.
Review the disclosure for the expert’s subject matter, opinions, factual bases, qualifications, and materials considered.
Serve a deposition notice that complies with the Texas Rules of Civil Procedure.
State any intended remote-deposition procedure with specificity.
Preserve the right to use the deposition for any purpose authorized by Texas law rather than representing that it will necessarily replace live testimony.
Address subpoena jurisdiction, witness location, document production, and remote-platform requirements in advance.
If a motion to quash is filed, emphasize that discoverability under Rule 192.3(e) is distinct from admissibility at trial.
Obtain a written order and a reporter’s record of any hearing that limits or prohibits the deposition.

Challenging an Opposing Expert

Identify the precise opinions being challenged.
Determine whether the challenge concerns discovery scope, professional licensure, expert qualifications, methodology, reliability, relevance, or trial use.
Locate any statute or rule that expressly requires a Texas license for the particular testimony.
Avoid assuming that the regulation of professional practice necessarily controls witness qualification.
Take the expert’s deposition before seeking exclusion when the testimony is discoverable and the deposition is necessary to develop the challenge.
Use the deposition to test the expert’s qualifications, methodology, factual assumptions, and connection between the data and conclusions.
Request relief tailored to the identified defect rather than a blanket prohibition unsupported by the governing discovery rules.
Preserve any Rule 702 or statutory admissibility challenge through a timely motion and ruling.

Preparing for Mandamus Review

Obtain a signed written order clearly stating the relief granted or denied.
Include the expert disclosure and all amended or supplemental disclosures.
Include the deposition notice, motion to quash, motion for protective order, responses, and replies.
Secure a certified or properly authenticated hearing transcript.
Explain why the expert testimony is material to a claim or defense.
Demonstrate why the discovery cannot be adequately reconstructed after trial.
Identify any impending trial deadline or other circumstance creating urgency.
Show that the trial court was given a fair opportunity to correct the asserted error.
Separate preserved issues from issues that were not first presented to the trial court.

Managing Docket-Control Deadlines

Confirm that the docket-control order has actually been signed.
Record the date the order was signed and the date counsel received notice.
Compare the signature date with every deadline stated in the order.
Preserve electronic-filing receipts and clerk file stamps for disputed pleadings.
Object promptly to any deadline that purports to operate retroactively.
Move for leave in the alternative when timeliness may be disputed.
Explain any lack of surprise or prejudice resulting from the pleading.
Obtain an express ruling on both the motion to strike and any motion for leave.

Preserving Trial-Testimony Issues

Object expressly to any requirement that testimony be presented only live and in person.
Identify the procedural rule authorizing the proposed use of deposition testimony.
Explain whether the deposition is being taken for discovery, preservation, trial use, or multiple authorized purposes.
Present any due-process complaint to the trial court before seeking appellate relief.
Obtain a specific ruling on the proposed use of the deposition.
Avoid relying solely on an objection directed to a different ruling, such as an order quashing the deposition.

Citation

In re Adelide Ybarra and Leon Barba, No. 03-26-00497-CV, __ S.W.3d __ (Tex. App.—Austin Sept. 29, 2026, orig. proceeding) (mem. op.).

Full Opinion

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