California Code, Labor Code - LAB § 249

(a) This article does not limit or affect any laws guaranteeing the privacy of health information, or information related to domestic violence or sexual assault, regarding an employee or employee's family member.  That information shall be treated as confidential and shall not be disclosed to any person except to the affected employee, or as required by law.

(b) This article shall not be construed to discourage or prohibit an employer from the adoption or retention of a paid sick days policy more generous than the one required herein.

(c) This article does not lessen the obligation of an employer to comply with a contract, collective bargaining agreement, employment benefit plan, or other agreement providing more generous sick days to an employee than required herein.

(d) This article establishes minimum requirements pertaining to paid sick days and does not preempt, limit, or otherwise affect the applicability of any other law, regulation, requirement, policy, or standard that provides for greater accrual or use by employees of sick days, whether paid or unpaid, or that extends other protections to an employee.