California Code, Health and Safety Code - HSC § 109335

The failure of any individual, person, firm, association, or other entity representing himself, or itself, as engaged in the diagnosis, treatment, alleviation, or cure of cancer to comply with any of the regulations adopted under this article and Article 1 (commencing with Section 109250) is a misdemeanor. A third, and subsequent violations, of this section is a felony, punishable by imprisonment pursuant to subdivision (h) of Section 1170 of the Penal Code.

This article and Article 1 (commencing with Section 109250) shall not apply to any person who depends exclusively upon prayer for healing in accordance with the teachings of a bona fide religious sect, denomination, or organization, nor practitioner thereof.