Cal. Code of Civil Procedure - CCP § 2032.510. Section 2032.510.
(a)
The attorney for the examinee or for a party producing the examinee, or that attorney’s representative, shall be permitted to attend and observe any physical examination conducted for discovery purposes, and to record stenographically or by audio technology any words spoken to or by the examinee during any phase of the examination.
(b)
The observer under subdivision (a) may monitor the examination, but shall not participate in or disrupt it.
(c)
If an attorney’s representative is to serve as the observer, the representative shall be authorized to so act by a writing subscribed by the attorney which identifies the representative.
(d)
If in the judgment of the observer the examiner becomes abusive to the examinee or undertakes to engage in unauthorized diagnostic tests and procedures, the observer may suspend it to enable the party being examined or producing the examinee to make a motion for a protective order.
(e)
If the observer begins to participate in or disrupt the examination, the person conducting the physical examination may suspend the examination to enable the party at whose instance it is being conducted to move for a protective order.
(f)
The court shall impose a monetary sanction
under Chapter 7 (commencing with Section 2023.010) against any party, person, or attorney who unsuccessfully makes or opposes a motion for a protective order under this section, unless it finds that the one subject to the sanction acted with substantial justification or that other circumstances make the imposition of the sanction unjust.