Cal. Health & Safety Code § 121370

No examination or inspection shall be required of any person who depends exclusively on prayer for healing in accordance with the teachings of any well recognized religious sect, denomination or organization and claims exemption on that ground, except that the provisions of this code regarding compulsory reporting of communicable diseases and isolation and quarantine shall apply where there is probable cause to suspect that the person is infected with the disease in a communicable stage. Such person shall not be required to submit to any medical treatment, or to go to or be confined in a hospital or other medical institution; provided, he or she can be safely quarantined and/or isolated in his or her own home or other suitable place of his or her choice.