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"Claim filing indicator code invalid (OF) "
"Element SBR05 is missing. It is required when SBR01 is not 'P' and payer is Medicare. Segment SBR is defined in the guideline at position 2900."
What to Do
This rejection indicates that an Insurance Type aside from "Other" needs to be used for this payer.
If you unsure what the type should be you can reach out to the clearinghouse or the insurance payer for clarification
Here is the code for commonly requested insurance types:
Other - OF
Medicare Part B: MB
Health Maintenance Organization: HM
Blue Cross/Blue Shield: BL
Commercial Insurance: CI
You can fix this by going to Billing > Insurers > Edit.
Under Insurance Type, you will need to change from "Other" to another designation.