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When considering claims to determine whether the second admission should be denied for readmission within the given time period, is the diagnosis considered the same as long as the root diagnosis code is the same in both instances?
We are looking at claims data for readmissions. There are many instances where all digits of the dx code match. If the guidelines state "for same diagnosis" do all digits need to match or is the diagnosis considered the same if the first three digits before the decimal match?