Date of Service
HHSC interprets the service date as when the pharmacy filled the prescription. This is the day when the pharmacy counted, prepared, packaged, compounded, or labeled the prescription. Pharmacies should ensure the accurate date of service is submitted in the "Date of Service" field (401-D1). Inaccurate information runs the risk of an audit exception and causes erroneous data on reports and extracts.
The written date is the date found on the hardcopy, or the date faxed, ordered, or e-prescribed.