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Public Health Investigation


Public Health Investigation

Contact Information
County of Los Angeles
Department of Public Health
Public Health Investigation
5555 Ferguson Drive, Suite 120-04
Commerce, CA.  90022
Phone: (323) 659-6148
Fax: (323) 728-0217

Public Health Investigation (PHI) Administration establishes standards of professional practice to direct the activities of PHIs who enforce public health laws, rules, and regulations governing communicable disease control.  PHI Administration develops and directs quality assurance activities, coordinates recruitment, provides continuing education, and develops and delivers training curricula for new staff.  The office provides technical support, investigative resources, and consultation to PHIs assigned to health districts and specialty programs.  The office also conducts special investigations requested by management and coordinates county-wide PHI responses to disease outbreaks ,natural disasters and bioterrorism events.  The State Marine Biotoxin Monitoring Program and mandated activities for Commercial Sex Venue Inspections and the Adult Film Industry Enforcement are coordinated out of this office.

PHI Administration serves as the Custodian of Records for the Department of Public Health.  This office responds to subpoena duces tecum and fulfills request for departmental records, pursuant to the California Public Records Act.  The PHIs assigned to the Custodian of Records unit provide consultation to Public Health units regarding the confidentiality of records, accepting personal subpoenas, and procedures for court appearances.  They also assist local funeral directors with complying with the public health laws of foreign countries when shipping human remains to those countries.

For information about requesting a Body Shipment Letter/Port of Entry Letter, click here.

For information about requesting a record, click here.

Hazardous Materials Records: Effective 7/1/17, all Hazardous Material report requests will be handled by Los Angeles County Fire Department, Health Hazmat Division. Please go to their website for information on submitting a record request:

For information about serving a subpoenas, call (323) 659-6148. You may also contact them via email at or by phone at (323) 890-4045

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