Discovery Health ICD-10 codes

My issue with Discovery Health has not been resolved. Discovery Health makes it as difficult as possible for payment of accounts. The client must now ensure that the ICD-10 code is correct, this after numerous interactions with the physiothe****** and in them providing and indicating the correct ICD-10 codes on the invoices that were forwarded to Discovery Health! I mean really, what more is there to do or is this a delay-tactic to avoid payment-responsibility?