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Rule 26.3.Exchange of medical records and timing of expert disclosure in medical malpractice actions.

Last verified July 1, 2026

In one sentenceRule 26.3 requires a plaintiff in a medical malpractice action to promptly hand over relevant medical records once a defendant responds to the complaint, requires defendants to reciprocate soon after, and requires the parties to disclose their standard-of-care and causation experts at the same time rather than letting one side see the other’s expert opinions first.

Full Text of Rule 26.3

Text sizeJump to: (a) (b)

a Exchange of medical records.
1 By plaintiff. Within 5 days after a defendant has filed an answer or a motion in response to the complaint, the plaintiff must serve on that defendant copies of all of the plaintiff’s available medical records relevant to the condition that is the subject matter of the action. The plaintiff also must provide a medical records authorization to allow the defendant to obtain copies of the plaintiff’s medical records from their original source.
2 By defendants. Within 10 days after the plaintiff serves medical records under Rule 26.3 (a)(1), a defendant must serve on the plaintiff and all other parties copies of all of the plaintiff’s available medical records relevant to the condition that is the subject matter of the action.
3 Records obtained under a medical records authorization. If a defendant obtains records using a plaintiff’s medical records authorization, the party obtaining the records must furnish to all other parties—at its sole expense—complete copies of any non-duplicative records not previously produced by the plaintiff or another defendant.
4 Limitations. The parties may agree to limit the records produced under this rule.
b Timing of expert disclosure. The parties must disclose the identities and opinions of standard of care and causation experts simultaneously, unless the parties agree or the court orders otherwise for good cause.

Amendment History

Added by R-17-0010, effective July 1, 2018.

Plain-English Summary

Rule 26.3 speeds up a piece of discovery that comes up in nearly every medical malpractice case: the plaintiff's medical history. Within 5 days after a defendant answers or otherwise responds to the complaint, the plaintiff must serve copies of all available medical records relevant to the condition at issue, along with a signed authorization letting the defendant obtain the same records directly from the source. Within 10 days after that, each defendant must serve its own copies of the plaintiff's relevant medical records on the plaintiff and every other party. If a defendant later obtains additional records using the plaintiff's authorization, it must share any records that no one has produced yet with everyone else in the case, at its own expense. The parties can agree to narrow what records get exchanged under this rule.

The rule also levels the playing field on expert timing. Rather than letting one side disclose its standard-of-care and causation experts first and tailor a response, the parties must disclose the identities and opinions of those experts at the same time, unless they agree otherwise or the court orders a different sequence for good cause.

Frequently Asked Questions

How quickly must a medical malpractice plaintiff turn over medical records?

Within 5 days after a defendant answers or otherwise responds to the complaint, along with a records authorization.

When must a defendant produce the plaintiff’s medical records in return?

Within 10 days after the plaintiff serves its own records.

Why does Rule 26.3 require simultaneous expert disclosure?

So neither side can see the other’s standard-of-care or causation expert opinions before disclosing its own.

Can the parties agree to limit what records get exchanged?

Yes, by agreement.

Source & verification. The rule text and History are reproduced verbatim from the official Arizona Rules of Civil Procedure (Ariz. R. Civ. P. 26.3). Prescribed by the Supreme Court of Arizona (Ariz. Const. art. 6, § 5). The plain-English summary is original and written by us. Last verified July 1, 2026. · Official source
Also known as: medical malpractice discoveryexchange of medical recordssimultaneous expert disclosure