What is the scope of expert testimony in a medical malpractice case?

An expert witness's opinion testimony is limited to a subject "that is sufficiently beyond common experience that the opinion of an expert would assist the trier of fact." (Evid. Code, 801, subd. (a).) The decision whether to permit expert testimony about a subject ordinarily lies within the discretion of the trial court and will not be reversed absent an abuse of discretion. (People v. McDowell (2012) 54 Cal.4th 395, 425-426.) We find no abuse here.

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