Issue:  The IG explains:  

• In C-CDA the use the moodCode attribute can differentiate between events and planned acts using a single template but in FHIR these are often separate resources (event vs. request resources)
• This is true for the Medication Activity template in C-CDA.  When the moodCode is INT or RQO, then the mapping should be to MedicationRequest.  But when the Medication Activity template is used with moodCode EVN, the semantics implies a statement about medications that have been taken in the past or are being taken now.  This requires mapping to the MedicationStatement Resource in order to express the information accurately.

Proposed Resolution:

Map Medication Activity with moodCode EVN to MedicationStatement and map Medication Activity with moodCode INT or RQO to MedicationRequest.