The record reveals that prior to and following the filing of the note of issue, defendant made numerous unanswered requests for medical records documenting plaintiff's preexisting condition from plaintiff's treating physician. The lack of response prevented defendant from scheduling the subject IMEs in a timely fashion inasmuch as the medical records were necessary to determine whether there was a causal relationship between plaintiff's current condition and defendant's alleged negligence. When defendant did receive the medical records approximately one month after the expiration of a stipulation signed by the parties granting defendant additional time for discovery, he promptly sought to schedule the IMEs, but plaintiff refused to cooperate. Under these circumstances, we find that defendant demonstrated unusual and unanticipated circumstances so as to warrant granting the relief requested ( see 22 NYCRR 202.21 [d]; Urena v Bruprat Realty Corp., 179 AD2d 505; Williams v Long Is. Coll. Hosp., 147 AD2d 558), and that plaintiff will not be prejudiced by having to appear for the IMEs ( see Acevedo v New York City Tr. Auth., 294 AD2d 310).