By Robert Langreth

Bloomberg: Not everybody reads the legal notices inside the Ottumwa Courier. But in January, Iowa pharmacist Mark Frahm noticed something unusual in the paper.

For years, Frahm’s South Side Drug bought pills from distributors, and dispensed prescriptions to the Wapello County jail. In turn, the pharmacy got reimbursed for the drugs by CVS Health Corp., which managed the county’s drug benefits plan.

As he compared the newspaper notice with his own records, and then with the county’s, Frahm saw that for a bottle of generic antipsychotic pills, CVS had billed Wapello County $198.22. But South Side Drug was reimbursed just $5.73.

So why was CVS charging almost $200 for a bottle of pills that it told the pharmacy was worth less than $6? And what was the company doing with the other $192.49?

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