On a provider call, the Centers for Medicare & Medicaid Services (CMS) confirmed that four state Medicaid agencies will be unable to directly adjudicate claims containing ICD-10 codes by the Oct. 1 deadline. California, Maryland, Louisiana and Montana will be "crosswalking" ICD-10 codes back to ICD-9 codes in order to adjudicate claims. As a result of this approach, there is concern that practices could experience a higher number of pended or rejected claims due to the imprecise nature of the ICD-10 to ICD-9 crosswalk.

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