Cal. Bus. & Prof. Code § 2837.104
(a) Beginning January 1, 2023, notwithstanding any other law, the following apply to a nurse practitioner who holds an active certification issued by the board pursuant to subdivision (b):
(b) The board shall issue a certificate to perform the functions specified in subdivision (c) of Section 2837.103 pursuant to that subdivision outside of the settings and organizations specified under subparagraphs (A) to (F), inclusive, of paragraph (2) of subdivision (a) of Section 2837.103, if the nurse practitioner satisfies all of the following requirements:
(c) A nurse practitioner authorized to practice pursuant to this section shall comply with all of the following:
(2) The nurse practitioner shall consult and collaborate with other healing arts providers based on the clinical condition of the patient to whom health care is provided. Physician consultation shall be obtained as specified in the individual protocols and under the following circumstances:
(4) The nurse practitioner shall establish a plan for referral of complex medical cases and emergencies to a physician and surgeon or other appropriate healing arts providers. The nurse practitioner shall have an identified referral plan specific to the practice area, that includes specific referral criteria. The referral plan shall address the following:
(i) Subdivision (h) shall not apply to a nurse practitioner if either of the following applies: