California Code, Evidence Code - EVID § 351.2

(a) In a civil action for personal injury or wrongful death, evidence of a person's immigration status shall not be admitted into evidence, nor shall discovery into a person's immigration status be permitted.

(b) This section does not affect the standards of relevance, admissibility, or discovery prescribed by Section 3339 of the Civil Code, Section 7285 of the Government Code, Section 24000 of the Health and Safety Code, and Section 1171.5 of the Labor Code.