Submission of files for No Medicare fee-for-service patients:

If a QRDA file is generated and submitted to CMS for the voluntary Hybrid Readmission measure, but the patient's visit was not billed as 'Medicare fee-for-service' (a different type of Payer was used for the visit). Will the engine ignore that file when calculating the risk-standardized readmission rate for the hybrid HWR measure? 

Is part of  CMS data evaluation to confirm the patients are 'Medicare fee-for-service' patients?

Thanks.