Community and Senior Services provides a hotline for reporting suspected abuse of senior citizens.
1-(877) 4R SENIORS (1-877-477-3646)
This is a 24-hour service, 7 days a week.
For Long Term Care Facility-related problems, call 1-(800) 334-9473.
For online reporting (including mandated reporting): Los Angeles County-Adult Protective Services.
Also see the Los Angeles District Attorney's web page on Elder Abuse.