VALIDITY_FLAG	DESCRIPTION
01	Unacceptable principal diagnosis, code is not reportable as principal diagnosis
02	Manifestation code is not reportable as principal diagnosis
03	Unspecified diagnosis code not acceptable as principal diagnosis since there is a more specific code available that would further accurately identify the condition
04	External cause of injury code not reportable as principal diagnosis
05	Principal diagnosis has a code first convention indicating that there is a secondary condition present which may need to be sequenced first
06	Principal diagnosis code is not valid for claim dates
07	No principal diagnosis code reported for claim dates
08	From date was not reported (field was left blank)
09	From Date is invalid
10	From Date is out of date range for HH grouper
11	Through date was not reported (field was left blank)
12	Through date is invalid
13	Through date precedes the reported From date
14	The Through date reported exceeds the Home Health period of care threshold of 30 days
15	Home Health period of care shorter than 30 days
