What is the difference between the prioritized list and the prior authorization grid?

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The Prioritized List of Health Services is maintained by the Health Evidence Review Commission (HERC) and helps determine funding/coverage. The prior authorization grid is maintained by Umpqua Health Alliance (UHA) to manage utilization and to determine the medical appropriateness of services or items.

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How do I check to see if this requires a PA?
Where do I find your prior authorization form?