5010 EDI Claims Tips
Correct Use of the Date of Service/Onset Date Fields
If the onset date is the same as the date of service, leave the onset date field blank. Entering the same date on both the onset field and service field will cause an error.
If the onset date is prior to the date of service, enter the two dates in their applicable fields.
National Provider Identifier (NPI) vs Social Security Number (SSN)
Be sure to use the NPI and not an employer identification or social security number as the primary identifier on your claim.