A party can be compelled to identify the experts whom he contemplates calling as witnesses and such experts may, upon good cause shown, be deposed by the other party. (Bolles v. Superior Court (1971) 15 Cal.App.3d 962, 963 [93 Cal.Rptr. 719]; Scotsman Mfg. Co. v. Superior Court (1962) 242 Cal.App.2d 527, 530-532 [51 Cal.Rptr. 511]; Swartzman v. Superior Court (1964) 231 Cal.App.2d 195, 204 [41 Cal.Rptr. 721]; Louisell & Walley, Modern Cal. Discovery (2d ed. 1972) § 5.12, p. 337.) A party can also be compelled at an appropriate stage of the proceedings before trial to elect whether or not he will call as a witness an expert with whom he has consulted in trial preparation and to disclose his election to his adversary. (Sanders v. Superior Court (1973) 34 Cal.App.3d 270, 279-280 [109 Cal.Rptr. 770].)
If the party elects to call the expert as a witness, the opposing party should be granted a reasonable time within which to conduct appropriate additional discovery. (Id., at p. 279.) Willful failure to disclose the identity of an expert whom the party intends to call as a witness may justify exclusion of his testimony. (Thoren v. Johnston ...