Cal. Penal Code § 273.5. Willful infliction of corporal injury; violation; punishment
(a) Any person who willfully inflicts corporal injury resulting in a traumatic condition upon a victim described in subdivision (b) is guilty of a felony, and upon conviction thereof shall be punished by imprisonment in the state prison for two, three, or four years, or in a county jail for not more than one year, or by a fine of up to six thousand dollars ($6,000) or by both that fine and imprisonment.
(b) Subdivision (a) shall apply if the victim is or was one or more of the following:
(1) The offender’s spouse or former spouse.
(2) The offender’s cohabitant or former cohabitant.
(3) The offender’s fiancé or fiancée, or someone with whom the offender has, or previously had, an engagement or dating relationship, as defined in paragraph (10) of subdivision (f) of Section 243.
(4) The mother or father of the offender’s child.
(c) Holding oneself out to be the husband or wife of the person with whom one is cohabiting is not necessary to constitute cohabitation as the term is used in this section.
(d) As used in this section, “traumatic condition” means a condition of the body, such as a wound, or external or internal injury, including, but not limited to, injury as a result of strangulation or suffocation, whether of a minor or serious nature, caused by a physical force. For purposes of this section, “strangulation” and “suffocation” include impeding the normal breathing or circulation of the blood of a person by applying pressure on the throat or neck.