Who has to pay after a code B9 denial?

Who owes depends on the details. The letters in front of the number matter: CO (contractual obligation) usually means an in-network provider must absorb it, while PR (patient responsibility) means the plan says you owe it.

How long do I have to appeal?

It depends on your coverage: 180 days for most employer and marketplace plans, 120 days for Original Medicare, about 90 days for Medicaid (varies by state), and only 65 days for Medicare Advantage. Set your deadline clock before you do anything else.

All denial codes · code B9

Denial code B9: what it means — and how to fight it

Denial code B9 (shown on your EOB as CO-B9 or PR-B9) means: “Patient is enrolled in a Hospice.” In plain English: The claim was denied because you're in hospice, so it billed the wrong payer. Care unrelated to the hospice condition can still be covered separately.

medium appealability Who owes depends on the details

What they're really saying

“Patient is enrolled in a Hospice.”

The claim was denied because you're in hospice, so it billed the wrong payer. Care unrelated to the hospice condition can still be covered separately.

Your odds

Worth fighting — many of these get fixed.

Care unrelated to the terminal diagnosis is often payable outside the hospice benefit.

Fewer than 1 in 100 denied claims are ever appealed. When people do appeal, roughly 4 in 10 win the first round — and independent external review overturns 40–50% of what reaches it.

How to appeal a code B9 denial

Decode. You just did — this page is step one.
Set your clock. 180 days for most employer and marketplace plans, 120 for Original Medicare, ~90 for Medicaid, only 65 for Medicare Advantage.
Urgent? If this is care you still need, call and request an expedited appeal — they must decide within 72 hours.
Ask whether the care was related to your hospice diagnosis. If the service was unrelated to the hospice (terminal) diagnosis, have the provider bill it as unrelated, with documentation. If related, it should route through the hospice provider, not you.
Send it certified. Letter plus evidence, keep copies of everything.
Escalate. Denied again? Independent external review — a doctor who doesn't work for your insurer decides.

Do it in minutes, free

The AppealClock tool translates your denial, drafts your appeal letter, computes your exact deadline — and watches the clock so you don't have to. No account. Your medical details never leave your device.

Start your appeal & set your clock →

Common questions

What does denial code B9 mean?: The claim was denied because you're in hospice, so it billed the wrong payer. Care unrelated to the hospice condition can still be covered separately.
Can I appeal a CO-B9 or PR-B9 denial?: Yes. Appealing is free and it is your legal right. For this code the odds are medium: Care unrelated to the terminal diagnosis is often payable outside the hospice benefit. Fewer than 1 in 100 denials are ever appealed — insurers count on silence.
Who has to pay after a code B9 denial?: Who owes depends on the details. The letters in front of the number matter: CO (contractual obligation) usually means an in-network provider must absorb it, while PR (patient responsibility) means the plan says you owe it.
How long do I have to appeal?: It depends on your coverage: 180 days for most employer and marketplace plans, 120 days for Original Medicare, about 90 days for Medicaid (varies by state), and only 65 days for Medicare Advantage. Set your deadline clock before you do anything else.