If a medication is started on a date later than the encounter date (from which the medication is prescribed), the medication will not print on the encounter.
Example: A patient's encounter is dated 01/08. On 01/09, the provider realizes that a medication prescription was not started in the encounter. The provider starts the medication. However, if the medication is not backdated to the encounter date, the medication will not print on the Encounter Summary for 01/08.