Declined claim

Refuse to accept claim of medical expenses due to Icd 10 code not listed. However the account with icd 10 code has been submitted several times yet its returned with the same request to submit icd10 code. When you call your refered to the HOD who does not answer his her phone. According to the doctors office they have also tried to fix the problem but Discovery could not give them a answer on how to overcome the flaw that is in discovery's own program.