California Code, Education Code - EDC § 44873

The qualifications for a physician and surgeon employed to serve on a half-time or greater than half-time basis shall be a valid certificate to practice medicine and surgery issued by the Medical Board of California or Osteopathic Medical Board of California and either a services credential with a specialization in health or a valid credential issued prior to November 23, 1970. The qualifications for a physician and surgeon employed for less than half time shall be a valid certificate to practice medicine and surgery issued by the Medical Board of California. Any school district may employ and compensate physicians and surgeons meeting the foregoing qualifications for the performance of medical services for that district and shall provide liability insurance coverage for the period of his or her employment.

As used in this section “medical services” includes, but is not limited to, any medical services required to be performed while required to be in attendance at high school athletic contests or meets.