All reports, analytics or other information drawn from the WA-APCD that an approved WA-APCD data user as defined in WAC 82-75-510(1) shares with any third party shall comply with the following restrictions.

(1) Allowed amount data may be made available for public use.

(2) Allowed amount data shall be provider or payer deidentified.

(3) Provider-specific allowed amount data shall be suppressed if that payer accounts for more than fifty percent of that provider's patient market share that payer deidentified data could readily be payer reidentified.

(4) Absolute or relative allowed cost information shall be communicated in ways that mitigate the potential to mislead data users including, but not limited to:

(a) Median cost mitigates the impact of outlier cases;

(b) Cost variation statistics (ranges, confidence intervals) illustrate the typical distribution of costs around a point estimate;

(c) Categorization, stratification or risk-adjustment techniques make like-comparisons of patient populations;

(d) Minimum case volume rules and/or reporting of volume alerts users to the universe or sample underlying the cost result; and

(e) Cell size suppression rules are followed whereby cells containing cost data based on a number of patients or providers that is below a minimum threshold count is suppressed.