(1) Each provider's reimbursement rate must be recalculated once each calendar year. The recalculated rate will be implemented prospectively. The recalculated rate will be effective on July 1 of the calendar year in which it was computed. Rates may be recalculated to reflect legislative inflation adjustments or to comply with the requirements of WAC 388-835-0900.

(2) If a provider participated in the ICF/ID program for at least six months during the previous calendar year, their rates must be based on the prior period's allowable costs. If the provider participated in the program for less than six months in the previous calendar year, their rates must be calculated according to WAC 388-835-0840 requirements.

(3) Unless circumstances beyond DSHS's control interfere, all providers submitting correct and complete cost reports by March 31 must receive notification of their new rates by July 1.

(4) When calculating a provider's rate, DSHS must use data from the most recent and complete cost report submitted by the provider and reviewed by DSHS as described in WAC 388-835-0700.

(5) Inflation factor adjustments are based on the Implicit Price Deflator for Personal Consumption from the state of Washington, Economic and Revenue Forecast prepared by the Office of the Forecast Council.