WOLLMAN, Circuit Judge.

Capson Physicians Insurance Company (Capson) filed a complaint against MMIC Insurance, Inc. (MMIC), in federal district court, seeking a declaration that MMIC was the primary professional liability insurer for Karl J. Hasik, M.D., and that Capson was the excess insurer. MMIC counterclaimed and filed a third-party complaint against Dr. Hasik and others, seeking rescission of its insurance policy or, in the alternative, a declaration that MMIC had no obligation to defend or indemnify Dr. Hasik for two medical negligence cases that had been filed against him. The district court1 granted MMIC's motion for summary judgment, concluding that MMIC was entitled to rescission under Iowa law. Capson now appeals from the adverse grant of summary judgment, and MMIC has filed a conditional cross-appeal. We affirm the judgment of the district court and dismiss the cross-appeal as moot.

I. Background

Dr. Hasik is a physician who specializes in obstetrics and gynecology. In 2007, he opened his own practice in Paragould, Arkansas, and obtained professional liability insurance from State Volunteer Mutual Insurance Company (State Volunteer).

In 2012, Dr. Hasik accepted a position at Crawford County Memorial Hospital (the hospital) in Denison, Iowa. In anticipation of his move from Arkansas to Iowa, he purchased a claims-made professional liability insurance policy from Capson.2 The Capson policy's effective period ran from July 27, 2012, to July 27, 2013, with a retroactive date of January 2, 2007. Because the Capson policy provided prior-acts coverage, Dr. Hasik did not purchase tail coverage from State Volunteer.3

After Dr. Hasik accepted the position at the hospital but before he began working there, Bill Bruce, the hospital's chief executive officer, submitted an application for insurance to MMIC, the hospital's insurer, seeking to add Dr. Hasik to the hospital's claims-made professional liability policy. Mr. Bruce indicated on the application that Dr. Hasik was insured by Capson and that the Capson policy covered claims dating back to January 2007. Mr. Bruce did not indicate whether the hospital was seeking prior-acts coverage from MMIC.

While the hospital was deciding whether to seek prior-acts coverage from MMIC or purchase tail coverage from Capson, Karen Hamilton, MMIC's agent, and Vera Ducept, MMIC's underwriter, exchanged emails regarding whether MMIC would provide prior-acts coverage for Dr. Hasik. Ms. Hamilton explained that the hospital had "requested a tail quote from [Dr. Hasik's] current carrier" and that the hospital "need[ed] to determine which would be the better financial option, having the [MMIC] policy issued [with] prior acts or purchasing the tail." Ms. Ducept responded that MMIC was willing to offer prior-acts coverage, quoting the premium for a first-year claims-made policy with a retroactive date of January 2, 2007. Ms. Hamilton thereafter confirmed that MMIC would provide first-year coverage if the hospital forewent prior-acts coverage. She also confirmed the cost of the premium for first-year coverage alone — that is, a policy that did not cover prior acts and thus had the same effective and retroactive date. Ms. Ducept replied, "You got it."

When Dr. Hasik began working for the hospital on October 29, 2012, he completed an application for professional liability insurance, which was then submitted to MMIC. The application asked about any claims that had been made against Dr. Hasik in the past that "ar[ose] out of the performance of professional services rendered or which should have been rendered by you." Dr. Hasik reported two medical malpractice lawsuits for incidents that had occurred in 1983 and 1997. He further reported that his former insurers had paid and closed those claims. When asked whether he was aware of any potential claims or circumstances that might reasonably lead to a claim or lawsuit being brought against him, Dr. Hasik responded, "No."

MMIC began insuring Dr. Hasik on November 1, 2012, with an effective date of October 31, 2012, which was the first day Dr. Hasik treated patients at the hospital. Dr. Hasik believed that he "had malpractice coverage insurance for prior acts not only from Capson but also from MMIC because of the application [he] had signed and sent in." Dr. Hasik testified, "I assumed that I was covered on both sides." The hospital, however, had not yet decided whether to purchase prior-acts coverage from MMIC.

According to Ms. Hamilton and Ms. Ducept, MMIC insured Dr. Hasik for any claims made against him for acts or omissions that occurred during his first year at the hospital, but did not insure him for any prior acts. Todd Thams, the hospital's insurance agent, also believed that Dr. Hasik and the hospital had decided to forego purchasing prior-acts coverage from MMIC, for Mr. Thams had sent an email on November 1, 2012, to Paula Cole, Mr. Bruce's executive assistant, requesting "proof of [Dr. Hasik's] tail coverage from Capson" showing a retroactive date of January 2007, "[s]ince he is not purchasing prior acts from MMIC." Mr. Thams also informed Ms. Cole that MMIC insured Dr. Hasik effective October 31, 2012, and advised her that "[t]he endorsement from MMIC will be issued after we receive the updated application and proof of tail coverage." The hospital did not provide proof of tail coverage. Instead, it requested prior-acts coverage from MMIC on November 30, 2012.

In the meantime, Dr. Hasik was served with a complaint that alleged medical negligence. The lawsuit had been filed in Arkansas state court and was based on Dr. Hasik's June 20, 2011, delivery of the Wilson baby, who was stillborn. Dr. Hasik had treated the mother of the Wilson baby throughout her pregnancy, and he described the stillbirth as a "very unexpected adverse outcome." Six weeks after the delivery, Dr. Hasik received a request for medical records from the office of the attorney representing the mother. Dr. Hasik reviewed the request, and his office manager responded to it in November 2011. Approximately one year later, on November 16, 2012, Dr. Hasik was served with the Wilson complaint. Dr. Hasik hand-delivered a copy of the complaint to Ms. Cole, and he faxed a copy of the complaint to Capson on November 20, 2012. Upon receiving notice of the Wilson lawsuit, Capson agreed to defend Dr. Hasik under a reservation of rights. Neither Dr. Hasik nor the hospital reported the lawsuit to MMIC at that time.

On November 20, 2012, Ms. Cole emailed Mr. Bruce about a conversation she had with Mr. Thams. She informed Mr. Bruce that "MMIC [is] still waiting [for a] decision regarding tail coverage for Dr. Hasik. They will not/cannot issue a certificate of insurance for him until they either have proof of tail coverage or we engage them for prior acts." When Mr. Bruce, who had been on vacation, returned to the office on November 26, Ms. Cole handed him the Wilson complaint, among other papers. On November 30, Mr. Bruce notified Mr. Thams that the hospital decided to "go[] with MMIC current and prior acts insurance," instead of purchasing tail coverage from Capson. Mr. Bruce requested confirmation that "the process is now moving and (when it is issued) a certificate of his insurance."

Ms. Hamilton thereafter notified Ms. Ducept that "after much debate we are adding Dr. Hasik to the Crawford County policy with the prior acts coverage as quoted. Please endorse the policy as soon as possible...." On December 3, 2012, MMIC issued the endorsement, which had an effective date of October 31, 2012, and a retroactive date of January 2, 2007. Mr. Bruce received a copy of the endorsement on December 4, 2012, and when he sent it to Dr. Hasik later that day, Mr. Bruce suggested that the two of them "meet to talk about the case current[ly] in process and how to go about reporting it." Mr. Bruce notified MMIC of the Wilson lawsuit on December 7, 2012.

On January 22, 2013, Dr. Hasik was served with another complaint, which alleged medical negligence in his August 20, 2010, delivery of the Ray baby, who suffered neurological injuries during delivery or shortly after birth. Dr. Hasik had received a request for medical records in April 2012 from an attorney representing the parents of the Ray baby. His office manager disclosed medical records in June 2012. MMIC was notified of the Ray lawsuit on January 24, 2013, two days after Dr. Hasik had been served. MMIC ultimately issued denial letters to Dr. Hasik for both lawsuits and sought to rescind its coverage of Dr. Hasik.

Capson filed this lawsuit on June 20, 2013, seeking a declaration that MMIC was the primary insurer and that Capson was the excess insurer. MMIC filed a counterclaim against Capson and a third-party complaint against Dr. Hasik and others, seeking a declaration that the MMIC policy did not cover the claims made by the mother of the Wilson baby and by the parents of the Ray baby. MMIC alleged that because Dr. Hasik was aware or reasonably should have been aware of potential claims by Ms. Wilson and Mr. and Mrs. Ray before October 31, 2012, the effective date of his insurance coverage, those claims were not first made during the policy period. MMIC's third-party complaint also sought rescission of the insurance policy, claiming that "Dr. Hasik made material misrepresentations that were intended to and did induce MMIC to provide him with professional liability coverage subject to a July 1, 2007 [sic] retroactive date." Capson later amended its complaint to seek alternative relief, namely rescission of its policy or a declaration that its policy excluded coverage for the Wilson and Ray lawsuits.

The parties cross-moved for summary judgment. MMIC argued, among other things, that Dr. Hasik's failure to notify MMIC that he had been served with the Wilson complaint constituted a material misrepresentation of fact that entitled MMIC to rescind the prior-acts coverage it had issued to Dr. Hasik. In support of its argument, MMIC cited the doctrine of uberrimae fidei, which "requires that parties to an insurance contract must accord each other the highest degree of good faith." See St. Paul Fire & Marine Ins. Co. v. Abhe & Svoboda, Inc., 798 F.3d 715, 717 (8th Cir. 2015).

Following a hearing on the motions, the district court rendered its decision orally. Applying Iowa law, the district court determined that Dr. Hasik was not aware of a potential claim when he completed his application for MMIC insurance in October 2012. Nor were the circumstances such that Dr. Hasik reasonably should have been aware of the claims when he completed his application:

As an alternative ruling, the district court determined that because MMIC failed to attach Dr. Hasik's application to the policy itself, in violation of Iowa code sections 515.133 and 515.134, MMIC was barred from rescinding its prior-acts coverage based on representations Dr. Hasik made in his application.

The district court ultimately ruled in favor of MMIC, however, because Dr. Hasik and the hospital failed to timely disclose the fact that Dr. Hasik had been served with the Wilson lawsuit:

The district court thereafter entered judgment in favor of MMIC and dismissed the remaining claims.

II. Discussion

We review de novo the district court's grant of summary judgment. PHL Variable Ins. Co. v. Fulbright McNeill, Inc., 519 F.3d 825, 828 (8th Cir. 2008). Summary judgment is appropriate if the moving party shows that there is no genuine dispute as to any material fact and the moving party is entitled to judgment as a matter of law. Fed. R. Civ. P. 56(a). We apply state substantive law in this diversity action, see PHL Variable Ins. Co., 519 F.3d at 828, and Capson has not challenged the district court's determination that Iowa law applies in this case.

We begin our analysis with a review of Iowa law on equitable rescission. "When a party claims that he has been induced to enter into a contract based on the other contracting party's misrepresentation, he may seek to avoid the contract by suing for rescission using the misrepresentation as a basis for the requested relief." Hyler v. Garner, 548 N.W.2d 864, 870 (Iowa 1996). To succeed on an equitable-rescission claim based on misrepresentation, a plaintiff must prove the following five elements: "(1) a representation, (2) falsity, (3) materiality, (4) an intent to induce the other to act or refrain from acting, and (5) justifiable reliance." Id. at 872.

The Iowa Supreme Court has "recognized that in some instances a failure to disclose material facts may be the equivalent of a false assertion." City of Ottumwa v. Poole, 687 N.W.2d 266, 269 (Iowa 2004) (citing First Nat'l Bank in Lenox v. Brown, 181 N.W.2d 178, 182 (Iowa 1970)); see also Sinnard v. Roach, 414 N.W.2d 100, 105 (Iowa 1987) ("A representation need not be an affirmative statement; it can arise as easily from a failure to disclose material facts."); Cornell v. Wunschel, 408 N.W.2d 369, 374 (Iowa 1987) ("[F]ailure to disclose a material fact can constitute fraud in Iowa."). In deciding whether a party's failure to disclose constitutes a false assertion, the court has quoted at length from the Restatement (Second) of Contracts, which provides, in relevant part:

Poole, 687 N.W.2d at 269 (quoting Restatement (Second) of Contracts § 161 (1981)).

The Iowa Supreme Court also has recognized that a duty to disclose material facts may arise even in arms-length transactions, particularly when one party has superior knowledge of material facts. See Wright v. Brooke Grp., Ltd., 652 N.W.2d 159, 174 (Iowa 2002) (stating that Iowa courts have "recognized a duty to disclose in situations where the plaintiff and the defendant were involved in some type of business transaction, such as buyer/seller or owner/contractor").

Smith v. Peterson, 282 N.W.2d 761, 767 (Iowa 1979) (internal citations omitted). A "legal duty to communicate to the other contracting party" thus may arise "from inequality of condition and knowledge." Sinnard, 414 N.W.2d at 105 (quoting Wilden Clinic, Inc. v. City of Des Moines, 229 N.W.2d 286, 293 (Iowa 1975)); see also Cornell, 408 N.W.2d at 374 ("To be actionable, the concealment must be by a party under a duty to communicate the concealed fact.").

We conclude that Dr. Hasik's and the hospital's nondisclosure of the Wilson lawsuit was the equivalent of a false assertion. The claim made against Dr. Hasik constituted a significant change that affected the risk that MMIC was offering to underwrite. It also rendered part of Dr. Hasik's application untrue. MMIC believed that it was offering prior-acts coverage to a doctor who had been sued for medical malpractice twice during his decades-long career, most recently in 1997. That Dr. Hasik did not have any claims then pending against him was a basic assumption upon which MMIC relied in determining whether to issue the policy. Unbeknownst to MMIC, however, a claim was pending against Dr. Hasik when the hospital finally decided to purchase prior-acts coverage for him. Absent disclosure by Dr. Hasik or the hospital, MMIC unwittingly agreed to undertake both the burden of defending Dr. Hasik against the claim and the risk of having to pay an award to the claimant. It is undisputed that MMIC would not have issued prior-acts coverage to Dr. Hasik had it known about the Wilson lawsuit. In light of these circumstances, even "the most elementary spirit of fair dealing" seems to require disclosure. See Stipcich v. Metro. Life Ins. Co., 277 U.S. 311, 317, 48 S.Ct. 512, 72 L.Ed. 895 (1928). We thus conclude that because Dr. Hasik and the hospital had superior knowledge of the material facts, they had a duty to disclose the Wilson lawsuit to MMIC after Dr. Hasik was served and before MMIC issued prior-acts coverage. See generally 6 Couch on Insurance 3d § 84:8 (Thomson Reuters/West rev. ed. 2012) ("Known changes in conditions material to the risk that occur between the opening of negotiations for insurance and the issuance of the policy generally must be divulged.").

In concluding that Iowa law placed a duty upon Dr. Hasik and the hospital to disclose the Wilson lawsuit to MMIC, we find the Stipcich decision to be instructive. Anton Stipcich, "after applying for the insurance and before the delivery of the policy and payment of the first premium, suffered a recurrence of a duodenal ulcer, which later caused his death." Stipcich, 277 U.S. at 315, 48 S.Ct. 512. He did not report the ulcer's recurrence to the insurance company. The United States Supreme Court concluded that Stipcich had a duty to disclose that information, stating that "[i]nsurance policies are traditionally contracts uberrimae fidei and a failure by the insured to disclose conditions affecting the risk, of which he is aware, makes the contract voidable at the insurer's option." Id. at 316, 48 S.Ct. 512. After acknowledging the relaxation of this rule in light of the practice of requiring the applicant to answer questions prepared by the insurer, the Court explained:

Id. at 316-17, 48 S.Ct. 512 (footnote and citations omitted). The reasoning in Stipcich applies here, perhaps with greater force, considering that any delay in MMIC's endorsement of prior-acts coverage was caused by the hospital's failure to promptly decide to purchase it.

Capson argues that the district court erred in applying the doctrine of uberrimae fidei, because the doctrine conflicts with Iowa law, which places the burden on the insurer to seek information, construes doubts in favor of the insured, precludes rescission when the insurer's questions have been answered truthfully, and does not permit courts "to rewrite insurance contracts based upon amorphous policy considerations." While these general statements of law may be true, none of the cases cited by Capson addresses the factual situation we have here. In light of Iowa law permitting equitable rescission based on misrepresentation — even in arms-length transactions — we find no error in the district court's passing mention of the doctrine of uberrimae fidei. Although the Iowa Supreme Court has not used that Latin term, it has recognized that in some cases a party with superior knowledge is obligated to disclose material information. That the MMIC application did not instruct the applicant to update material information did not relieve the applicant of the obligation to do so. We believe that the Iowa Supreme Court would impose a duty to disclose in this case, where MMIC's application had asked about any claims or potential claims against Dr. Hasik, who truthfully answered that there were no claims pending, and then, while the hospital was considering its insurance options and before it decided to purchase coverage from MMIC, Dr. Hasik and the hospital became aware of a claim made against Dr. Hasik. See Stipcich, 277 U.S. at 318, 48 S.Ct. 512 ("The obligation was not one stipulated for by the parties, but is one imposed by law as a result of the relationship assumed by them and because of the peculiar character of the insurance contract.").

In sum, we hold that the elements of equitable rescission were satisfied in this case. Dr. Hasik's and the hospital's nondisclosure of the Wilson lawsuit was the equivalent of a material representation that was false. The parties have not disputed the remaining elements of equitable rescission, and we thus conclude that MMIC was entitled to rescind the prior-acts coverage it had agreed to provide.4

We further hold that Iowa code sections 515.133 and 515.134 do not preclude a judgment of rescission in this case. Section 515.133 requires that an insurer provide to the insured a true copy of the insured's application or representations. Section 515.134 states that an insurer's failure to do so precludes it "from pleading, alleging, or proving any such application or representations, or any part thereof, or falsity thereof, or any parts thereof, in any action upon such policy." These statutes have been construed strictly "to mean that an insurance company cannot rely defensively on the falsity of a statement in an application or on a condition set out in an application unless the signed application or an exact copy is attached to the policy." St. Paul Reinsurance Co., Ltd. v. Commercial Fin. Corp., No. C00-4080, 2000 WL 33915816, at *19 (N.D. Iowa Nov. 20, 2000). They do not address any nondisclosure of facts that arise after the submission of an application, however. See N.Y. Life Ins. Co. v. Gay, 36 F.2d 634, 637 (6th Cir. 1929). Even setting aside the fact that service of the Wilson lawsuit rendered part of Dr. Hasik's application untrue, whether a lawsuit was pending against Dr. Hasik was material to the risk for which he sought coverage. That no lawsuit was pending against Dr. Hasik was a fact basic to the transaction and an assumption upon which MMIC relied.

The judgment is affirmed. The cross-appeal is dismissed as moot.