AC4Unaccepted Referral Number. Not 6 numerics Equal to the Practitioner billing number Referring number is 722900-744292 (Nurse Practitioner (NP)) and FSC is not eligible for NP referral. Referring number is 700000-722899 (Midwife (MW)) and FSC is not eligible for MW referral.
Assessment · General error codes
What this reference tells you
AC4 is an Error Report rejection condition. It helps identify why a claim failed initial processing so the underlying data or documentation can be reviewed.
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.