# description
Codes for the reason why a communication did not happen.

# concept[].definition
The communication was not done due to an unknown reason.

# concept[].definition
The communication was not done due to a system error.

# concept[].definition
The communication was not done due to an invalid phone number.

# concept[].definition
The communication was not done due to the recipient being unavailable.

# concept[].definition
The communication was not done due to a family objection.

# concept[].definition
The communication was not done due to a patient objection.