Death rates for U.S. kidney dialysis patients are among the highest in the industrialized world. A CBS News Data Team investigation has found that one-third of the nation's dialysis clinics have failed to meet federal performance standards.

In Texas, where the number of dialysis centers is higher than in any other state, the I-Team discovered that the problem is especially severe.

Texas ranks 13th nationwide for clinics with federal penalties, and North Texas has one of the highest penalty rates in the state, just behind Houston.

Any dialysis clinic that scored below a 55 out of 100 points across several performance measures received a financial penalty. The lower the score, the more the Centers for Medicare and Medicaid Services (CMS) docks their funding.

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