Casey Johnson Died of 'Natural' Causes

2/4/2010 2:00 PM PST

Casey Johnson Died of 'Natural' Causes

Casey Johnson's manner of death has been determined as "natural" by the L.A County Coroner's Office.

Casey's cause of death is listed as "diabetic ketoacidosis" -- which is a state of severe insulin deficiency.

As we first reported, Casey's body was found on January 4 ... but we're told her body was undiscovered for several days.

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