Ariz. Rev. Stat. § 12-2603
B. If the claimant or the party designating a nonparty at fault or its attorney certifies pursuant to subsection H of this section that expert opinion testimony is necessary, the claimant shall serve a preliminary expert opinion affidavit with the initial disclosures that are required by rule 26.1, Arizona rules of civil procedure. If a party designates a nonparty at fault and certifies pursuant to subsection H of this section that expert opinion testimony is necessary, that party shall serve a preliminary expert opinion affidavit within sixty days after filing the designation. The claimant or the party designating a nonparty at fault may provide affidavits from as many experts as the claimant or the party designating a nonparty at fault deems necessary. The preliminary expert opinion affidavit shall contain at least the following information:
D. If the claimant or the party designating the nonparty at fault or its attorney certifies that expert testimony is not required for the claim or designation and the claimant, the health care professional or designated nonparty at fault disputes that certification in good faith, the claimant, the health care professional or the designated nonparty at fault may apply by motion to the court for an order requiring the claimant or the party designating the nonparty at fault to obtain and serve a preliminary expert opinion affidavit under this section. In the motion, the claimant, the health care professional or the designated nonparty at fault shall identify the following:
H. For the purposes of this section:
1. "Claim" means a legal cause of action against a health care professional under sections 12-561 through 12-563 or under title 46, chapter 4 or an affirmative defense or designation of a nonparty at fault to which all of the following apply: