This code system http://terminology.hl7.org/CodeSystem/communication-not-done-reason defines the following codes:
\n \n \n \n \n \n Code\n \n | \n \n \n \n Display\n \n | \n \n \n \n Definition\n \n | \n \n
\n \n \n \n unknown\n \n \n \n | \n \n Unknown | \n \n The communication was not done due to an unknown reason. | \n \n
\n \n \n \n system-error\n \n \n \n | \n \n System Error | \n \n The communication was not done due to a system error. | \n \n
\n \n \n \n invalid-phone-number\n \n \n \n | \n \n Invalid Phone Number | \n \n The communication was not done due to an invalid phone number. | \n \n
\n \n \n \n recipient-unavailable\n \n \n \n | \n \n Recipient Unavailable | \n \n The communication was not done due to the recipient being unavailable. | \n \n
\n \n \n \n family-objection\n \n \n \n | \n \n Family Objection | \n \n The communication was not done due to a family objection. | \n \n
\n \n \n \n patient-objection\n \n \n \n | \n \n Patient Objection | \n \n The communication was not done due to a patient objection. | \n \n
\n \n