Ordered that the order is affirmed, with costs.
In order to prevail on a motion to vacate a default in opposing a motion, a moving party is required to demonstrate both a reasonable excuse for its default and a meritorious claim ( see Eugene Di Lorenzo, Inc. v A.C. Button Lbr. Co., 67 NY2d 138, 141; Montague v Rivera, 50 AD3d 656; Perez v Han Ki Man, 39 AD3d 521; Itskouich v Lichenstadter, 2 AD3d 406, 407; Beale v Yepes, 309 AD2d 886, 887). Here, the plaintiff failed to do either. The conclusory reasons for the default offered by the plaintiffs counsel were not substantiated by detailed facts and thus were insufficient to constitute a reasonable excuse ( see Montague v Rivera, 50 AD3d 656; Juarbe v City of New York, 303 AD2d 462). Further, the plaintiff failed to submit competent medical evidence demonstrating that she sustained a serious injury within the meaning of Insurance Law § 5102 (d) as a result of the subject automobile accident ( see Montague v Rivera, 50 AD3d 656; Itskovich v Lichenstadter, 2 AD3d at 407; Beale v Yepes, 309 AD2d 886; Waaland v Weiss, 228 AD2d 435, 436).