PRVn are validity flags that identify invalid or inconsistent ICD-9-CM procedures in the data elements PRn. There is one validity flag for each procedure, i.e., PRV1 is the validity flag for PR1.
The following are acceptable values for PRVn:
||Indicates a valid and consistent procedure code.
||Indicates an invalid code for the discharge date. A six-month window around the discharge date (three months before and three months after) is allowed for anticipation of or lags in response to official ICD-9-CM coding changes.
||Indicates a missing (blank) procedure code.
||Indicates that the code is inconsistent with sex of the patient (ED2nn) or the patient's age (ED5nn).
This data element was discontinued in 1998. Information on the validity of a procedure code is retained within the data element PRn.