- <>15 - Natural Disaster 
- <>7 - Third Party Processing Delay 
- <>17 - No response to initial request 
- <>1 - Proof of Eligibility Unknown or Unavailable 
- <>4 - Delay in Certifying Provider 
- <>16 - Lack of Information 
- <>2 - Litigation 
- <>5 - Delay in Supplying Billing Forms 
- <>8 - Delay in Eligibility Determination 
- <>11 - Other 
- <>3 - Authorization Delays 
- <>6 - Delay in Delivery of Custom-made Appliances 
- <>9 - Original Claim Rejected or Denied Due to a Reason Unrelated to the Billing Limitation Rules 
- <>10 - Administration Delay in the Prior Approval Process