We want to make sure physicians are not going to be expected to manually enter null values if no information is available. The assumption should be that it’s automated. Suggest: “The assumption is that system implementers will, wherever possible, automate the population of missing values without requiring--but providing the option for--manual entry.”

Existing Wording:

If the information does not exist and the cardinality of the element is >= 1..*, the Sender SHALL   send the reason for the missing information using values (such as nullFlavors ) from the value set where they exist or use the dataAbsentReason extension\.