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Actually, if your PIP paid for an injury that your primary health insurance paid for, then under Aetna's right to subrogation they are actually entitled to reimbursement for anything they paid that was covered by some other insurance. It sounds here like Baylor's billing is now very confused, since Aetna paid them already and you should have received the $600 and the remainder should have gone to Aetna and not Safeco under Aetna's right to subrogation.
You can notify Aetna, as they have a right here to reimbursement. Your other recourse is suing Baylor for breach of contract
and negligence for improperly handling the insurance funds. Generally, Aetna will step in and go after Baylor and Safeco to get the money back and to straighten out the bill, since Aetna already paid what Baylor is now claiming you owe. If Aetna will not step in, then you would have to file suit in the small claims
court against Baylor for improperly handling the insurance funds in breach of contract and negligence.
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