Section 18.001’s “Unless” Clause as an All-or-Nothing Bar: Any Compliant Counteraffidavit Defeats Affidavit Admissibility

Case: Tatia Ortiz v. Ramu Nelapatla
Court: Supreme Court of Texas
Date: May 1, 2026
Opinion Analyzed: Justice Sullivan, dissenting (on petition for review from the Court of Appeals for the Fifth District of Texas)

1. Introduction

This dissent addresses the operation of Texas Civil Practice and Remedies Code § 18.001, a procedural-evidentiary mechanism that allows a personal-injury claimant to prove the reasonableness and necessity of medical expenses through affidavits—thereby avoiding (i) the hearsay bar ordinarily applicable to affidavits and (ii) the usual need for expert testimony to establish the medical-expense predicate.

The central dispute is how § 18.001(b)’s conditional admissibility—affidavits are sufficient evidence “[u]nless a controverting affidavit is served”—works when the defense counteraffidavit challenges only some of the amounts or services reflected in the claimant’s affidavit. The majority (as described by the dissent) treats admissibility as divisible: uncontroverted “parts” remain admissible. Justice Sullivan reads the statute as unitary: once a compliant controverting affidavit is served, the § 18.001 pathway closes for the entire affidavit and the claimant must proceed under ordinary evidentiary rules.

2. Summary of the Opinion (Dissent)

Justice Sullivan would affirm the district court’s refusal to grant a new trial on damages and would bar reliance on the claimant’s § 18.001 affidavits once the defense served a controverting affidavit. In his view:

  • § 18.001 is a limited exception to two general rules: affidavits are hearsay, and medical bills alone do not prove reasonableness and necessity.
  • That exception disappears in an all-or-nothing fashion when a controverting affidavit is served “to an affidavit,” regardless of whether the controversion targets every line item.
  • The majority’s “claim-by-claim” admissibility approach may be attractive policy but is inconsistent with the statutory text and with the Court’s prior characterization of § 18.001’s effect in In re Chefs' Produce of Houston, Inc.

The dissent candidly acknowledges that the statutory scheme can yield “strange results,” including strategic behavior (e.g., controverting a trivial amount to force full-blown expert litigation), but insists that courts must apply the text as written and leave redesign to the Legislature.

3. Analysis

A. Precedents Cited

1) Medical bills are not enough; expert testimony often required

  • Wheeler v. Tyler Se. Ry. Co., 43 S.W. 876 (Tex. 1898) and Dall. Ry. & Terminal Co. v. Gossett, 294 S.W.2d 377 (Tex. 1956): cited for the longstanding proposition that copies of medical bills do not, standing alone, establish that charges were reasonable and services necessary.
  • Hou. E. & W. Tex. Ry. Co. v. Jones, 1 S.W.2d 743 (Tex. App.—Beaumont 1927, writ ref'd): another early articulation of the same evidentiary requirement, reinforcing that this is not a modern invention but a deep-rooted Texas rule.
  • In re Allstate Indem. Co., 622 S.W.3d 870 (Tex. 2021) (citing Hong v. Bennett, 209 S.W.3d 795 (Tex. App.—Fort Worth 2006, no pet.)): invoked for the notion (at least suggested there) that expert testimony may be the only sufficient proof absent § 18.001. The dissent treats that discussion as “probably dicta” and questions its correctness, emphasizing that earlier cases framed expert testimony as sometimes necessary depending on complexity—not always required as a matter of law.
  • Texarkana Mem'l Hosp., Inc. v. Murdock, 946 S.W.2d 836 (Tex. 1997) and Gunn v. McCoy, 554 S.W.3d 645 (Tex. 2018): used to support the dissent’s narrower view of expert-necessity: experts may be required where issues are beyond lay understanding, rather than categorically in every medical-expense dispute.

2) Dicta constraints and interpretive discipline

  • Fed. Sign v. Tex. S. Univ., 951 S.W.2d 401 (Tex. 1997): cited for the proposition that courts should not treat unnecessary discussion as binding; used to label parts of In re Allstate Indem. Co. as dicta because that case centered on § 18.001(f) compliance.
  • Burrage v. United States, 571 U.S. 204 (2014) (quoting Commissioner v. Lundy, 516 U.S. 235 (1996)): cited for textualist restraint: courts apply statutes as written even when alternative policy approaches seem superior.

3) Prior Texas Supreme Court reading of § 18.001’s effect

  • In re Chefs' Produce of Houston, Inc., 667 S.W.3d 297 (Tex. 2023) (per curiam): the dissent’s central precedent. Justice Sullivan quotes its statement that with a compliant counteraffidavit, “the claimant’s evidentiary burden ... is the same as if the initial affidavit had never been served.” Because Chefs' Produce involved a counteraffidavit that challenged only “portions” of costs, the dissent treats it as powerful support for an all-or-nothing consequence.

4) Jury-trial function and constitutional concerns (raised but not decided)

  • Stephens v. State, 774 P.2d 60 (Wyo. 1989), overruled on other grounds by Large v. State, 177 P.3d 807 (Wyo. 2008): cited by analogy for the concern that making experts dispositive could intrude on the jury’s factfinding role.
  • Texas Constitution references: Tex. Const. arts. I, § 15 and V § 10 are mentioned to frame a historical-originalist intuition that juries historically could assess ordinary medical-reasonableness questions without mandatory experts.

B. Legal Reasoning

1) The statutory structure: exception, then exception-to-the-exception

The dissent frames § 18.001 as a legislatively created shortcut around two obstacles: hearsay (affidavits) and proof of reasonableness/necessity (often via experts). The key move is to treat the “unless” clause in § 18.001(b) as a switch:

If a controverting affidavit is served, the statutory shortcut is disabled, and the proponent must prove medical expenses the ordinary way.

2) Textual granularity: “affidavit” versus “matters”

The majority (as described) relies on § 18.001(f)’s allowance that a counteraffidavit can contravene “all or part of any of the matters contained in the initial affidavit,” inferring that only the controverted “parts” lose admissibility. The dissent responds with a text-based distinction:

  • § 18.001(b) speaks to the admissibility/sufficiency of “affidavits” and withdraws that effect when a controverting affidavit is served.
  • § 18.001(f) addresses what a counteraffidavit may target (“all or part” of “matters”), but does not alter § 18.001(b)’s unit of operation for the hearsay exception (“an affidavit”).
  • The presence of both terms shows the Legislature knew how to draft in “parts/matters” when it wanted; its choice of “affidavit” in § 18.001(b) should be respected.

3) Role of precedent: Chefs' Produce as confirming an all-or-nothing consequence

Justice Sullivan treats In re Chefs' Produce of Houston, Inc. as confirming that once a compliant counteraffidavit is served, the claimant is effectively back to the baseline evidentiary regime, even if only some charges were challenged. The dissent rejects the majority’s attempt to cabin Chefs' Produce and asserts that its language cannot be coherently read as claim-by-claim.

4) Policy concerns acknowledged but subordinated

The dissent concedes the all-or-nothing approach can be exploited: a defendant could controvert a trivial amount to force the plaintiff to hire experts, and juries may hear expert testimony on issues no one truly disputes. But the dissent treats these as legislative-design issues, not grounds for judicial revision, invoking Burrage v. United States and Commissioner v. Lundy for interpretive restraint.

C. Impact

1) Immediate doctrinal fork: claim-by-claim vs. affidavit-by-affidavit

Although the analyzed writing is a dissent (and thus not controlling law), it crystallizes the central interpretive fork for § 18.001 disputes:

  • Majority approach (as described): partial controversion yields partial admissibility—uncontroverted portions of the affidavit remain usable without expert testimony.
  • Dissent’s approach: any compliant controversion disables § 18.001(b) for the affidavit, requiring traditional proof (often expert testimony) for medical reasonableness and necessity.

2) Litigation incentives

Under the dissent’s reading, defendants would have a strong incentive to controvert at least one item in each affidavit to force expert costs and potentially reduce settlement value. Plaintiffs would respond by investing earlier in experts or attempting to segment bills into multiple affidavits (a tactic the dissent notes could create gamesmanship, though he views it as irrelevant to the textual question).

3) Legislative pressure

The dissent expressly invites legislative attention by cataloging alternative designs (e.g., awarding uncontroverted amounts without experts, retaining the shortcut for “simple” charges, or eliminating expert requirements in defined contexts). If the majority’s interpretation is perceived as too permissive—or the dissent’s too harsh—§ 18.001 may become a candidate for amendment clarifying whether the statute operates on “affidavits,” “matters,” or “claims,” and at what level of billing granularity.

4. Complex Concepts Simplified

  • Hearsay (why affidavits are usually excluded): An affidavit is an out-of-court statement offered for its truth. Without a statute like § 18.001, it is generally inadmissible unless an exception applies.
  • Reasonableness and necessity of medical expenses: Texas requires proof not just that bills exist, but that the treatment was necessary and the charges were reasonable—often needing testimony beyond a stack of invoices.
  • § 18.001 affidavit and controverting affidavit: The claimant files an affidavit to establish medical expenses; the opponent can file a counteraffidavit disputing those expenses. The dispute here is what happens to admissibility when the counteraffidavit disputes only some items.
  • Dicta: Statements in an opinion not necessary to decide the case. The dissent labels parts of In re Allstate Indem. Co. dicta because the case primarily concerned counteraffidavit compliance under § 18.001(f).
  • Per curiam: An opinion issued by the court as an institution rather than authored and signed by a single justice (as in In re Chefs' Produce of Houston, Inc.).
  • “Writ ref’d”: A historical notation indicating the Texas Supreme Court refused review in a manner that traditionally signaled agreement with the lower court’s judgment (and, often, its reasoning).

5. Conclusion

Justice Sullivan’s dissent offers a rigorously textual account of § 18.001: the statute creates a narrow evidentiary shortcut, but once a compliant controverting affidavit is served, the shortcut disappears for the affidavit as a whole, returning the parties to traditional proof requirements (often expert testimony) and excluding the otherwise-hearsay affidavit. The dissent anchors that reading in the statute’s use of “affidavit” in § 18.001(b), contrasts it with “matters” in § 18.001(f), and leans heavily on In re Chefs' Produce of Houston, Inc. for an all-or-nothing understanding.

Even though the dissent recognizes the practical oddities and strategic incentives such a regime can create, it insists that statutory repair is the Legislature’s job. The opinion thus stands as a clear interpretive blueprint—and a warning about litigation incentives—for future § 18.001 disputes and for any legislative reconsideration of Texas’s medical-expense proof framework.