Cal. Rev. & Tax. Code § 214.9
For the purposes of Section 214, a "hospital" includes an outpatient clinic, whether or not patients are admitted for overnight stay or longer, where the clinic furnishes or provides psychiatric services for emotionally disturbed children, or where the clinic is a nonprofit multispecialty clinic of the type described in subdivision (l) of Section 1206 of the Health and Safety Code, so long as the multispecialty clinic does not reduce the level of charitable or subsidized activities it provides as a proportion of its total activities.
For purposes of this section, a "hospital" does not include those portions of an outpatient clinic which may be leased or rented to a physician for an office for the general practice of medicine.
Ca. Rev. and Tax. Code § 214.9