Box 21 - Diagnosis or Nature of Illness or Injury

  • Updated

Box Definition

Box 21 on the CMS-1500 form is used to indicate the diagnosis codes for the patient.


In AveaOffice

To change the diagnosis codes for U/R-required services:

  1. Navigate to the Patient>Treatment Episodes>[Select Treatment Episode]>Intake>Behavioral Service Diagnoses  Diagnoses.png
  2. Select Set for each diagnosis code that should be updated.
  3. Select Set Code.

To change the diagnosis codes for standalone services:

  1. Navigate to Attendance in the Navigation Menu.
  2. Select the week that includes the date of service to be changed.
    Attendance Week.png
  3. Click the lock icon to unsubmit the treatment.
  4. Click the edit pencil icon to edit the standalone treatment.
    Edit Standalone.png
  5. Click the X next to the Diagnosis code you wish to remove.
    Remove Diagnoses.png
  6. Click Save.
  7. Click Add New ICD10 Diagnosis
  8. Search to find correct Diagnosis and click the code number to add Add New Diagnoses.png


EDI Loop/Segment

Loop 2300, Segment HI

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