Denial code CO-50

What does Denial code CO-50 mean on a medical bill?

CO-50 means the plan decided this service does not meet its own rules for payment, given the reason recorded on the claim. That is the plan's coverage judgment, not your doctor's opinion of what you needed. Often the care was right and the claim simply carried a diagnosis code that does not line up with what was done, or went out without the note explaining why it was done. That part is fixable. When the record does support the care, the next move is your plan's appeal process, and your doctor's office holds the paperwork it runs on. The CO letters keep the amount on the provider's contract rather than on your statement while that plays out.

What should I watch out for with Denial code CO-50?

• Ask the billing office which diagnosis code went out on the claim, then compare it against your visit notes
• Ask your doctor's office to send supporting records and refile before you treat this as the final answer
• Ask your plan how to open an appeal on this claim and what its deadline for your plan is