Field
11 often generates questions about Field 9. Field 9 is only
for secondary insurance information and is not required. Participating providers
may fill out Field 9 to have the claim crossed over for a secondary insurer
to pay.
If you wish, you may complete Field 9 for secondary insurer information or
for your office records. Medicare does not monitor Field 9 unless you are requesting
to have the claim crossed over for payment.