I remember the day this trend started. A Dad in an Ohio court argued, bipolar disorder is a brain disorder. His daughter's hospitalization should be re-imbursed under the $1 mil limit for medical conditions, and not under the $25,000 lifetime limit for mental health. The judge looked at the PET scans of patients, understood the expert testimony. He ruled, it was a medical condition, covered by the $1 mil limit.
Within a week, most patients on my inpatient service received bipolar diagnosis, except mine.
Now, the incidence has increased 40 fold in children, and 2 fold in adults in outpatient care. Reviewed in this article, as well.