Section 4631 Of Chapter 1. Short Title And Definitions From California Probate Code >> Division 4.7. >> Part 1. >> Chapter 1.

. "Primary physician" means a physician designated by a patient or the patient's agent, conservator, or surrogate, to have primary responsibility for the patient's health care or, in the absence of a designation or if the designated physician is not reasonably available or declines to act as primary physician, a physician who undertakes the responsibility.