California Code, Health and Safety Code - HSC § 123125

(a) This chapter shall not require a health care provider to permit inspection or provide copies of alcohol and drug abuse records where, or in a manner, prohibited by Section 408 of the federal Drug Abuse Office and Treatment Act of 1972 (Public Law 92-255) or Section 333 of the federal Comprehensive Alcohol Abuse and Alcoholism Prevention, Treatment, and Rehabilitation Act of 1970 (Public Law 91-616), or by regulations adopted pursuant to these federal laws. Alcohol and drug abuse records subject to these federal laws shall also be subject to this chapter, to the extent that these federal laws do not prohibit disclosure of the records. All other alcohol and drug abuse records shall be fully subject to this chapter.

(b) This chapter shall not require a health care provider to permit inspection or provide copies of records or portions of records where or in a manner prohibited by existing law respecting the confidentiality of information regarding communicable disease carriers.