V21Diagnostic Code Required
Validity · General error codes
What this reference tells you
V21 is an Error Report rejection condition. It helps identify why a claim failed initial processing so the underlying data or documentation can be reviewed.
Suggested review path
Add a valid diagnostic code before submission; the preflight gate should stop blank diagnosis fields.
Before using this code
Confirm the current Ministry publication, the patient and provider context, the date of service, and documentation supporting the claim. A searchable reference does not establish eligibility or guarantee payment.