Patient Account Number Validation Error

The value referenced in the error appears to be truncated value of the Patient Control Number we submitted. It is alphanumeric and has 32 characters, which should be valid since the documentation states a maximum length of 38.

Does the clearinghouse use the Patient Control Number to populate the Patient Account Number? If so, could this be causing the validation error?

{
  "field": "01",
  "value": "AP1C82C60A529E48C5B7",
  "description": "The Patient Account Number must not be greater than 20 characters and must only contain alphanumeric characters, spaces, and !\"&'()+,-./;?=%@[]{}#$\n\nLOOP 2300 CLM01",
  "location": "2300 CLM"
}

Resolution

I believe both the patientAccountNumber and patientControlNumber were submitted on the transaction as the same value. This would cause the transaction to error out as the patientAccountNumber has a maximum of 20 characters while the patientControlNumber is 38.

The value that should be sent on the claim is the patientControlNumber, the patientAccountNumber populates based on the submitted data if the field was sent. Only the patientControlNumber is valid per our JSON-TO-EDI mapping guides and should be the only submitted value.