Who has to pay after a code 19 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.

Denial code 19 · CO-19 / PR-19 · translated

Denial code 19: what it means — and how to fight it

Denial code 19 (shown on your EOB as CO-19 or PR-19) means: “This is a work-related injury/illness and thus the liability of the Worker's Compensation Carrier.” In plain English: They think this should be workers' comp, not health insurance. If it wasn't work-related, say so — this is often a wrong guess triggered by the injury type.

high appealability Who owes depends on the details

What they're really saying

“This is a work-related injury/illness and thus the liability of the Worker's Compensation Carrier.”

They think this should be workers' comp, not health insurance. If it wasn't work-related, say so — this is often a wrong guess triggered by the injury type.

Your odds

Strong — this type of denial has real weaknesses.

Reverses with a simple signed statement when the injury wasn't work-related.

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 19 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.
Tell the insurer in writing whether this was work-related; that single fact decides the path. Send a statement that the injury was not work-related (many insurers have a one-page form). If it WAS work-related, file with workers' comp — do not let the claim die between two payers.
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 19 mean?: They think this should be workers' comp, not health insurance. If it wasn't work-related, say so — this is often a wrong guess triggered by the injury type.
Can I appeal a CO-19 or PR-19 denial?: Yes. Appealing is free and it is your legal right. For this code the odds are high: Reverses with a simple signed statement when the injury wasn't work-related. Fewer than 1 in 100 denials are ever appealed — insurers count on silence.
Who has to pay after a code 19 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.