Who has to pay after a code 174 denial?

Usually the provider's problem — not yours. 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 174

Denial code 174: what it means — and how to fight it

Denial code 174 (shown on your EOB as CO-174 or PR-174) means: “Service was not prescribed prior to delivery.” In plain English: You got the equipment or service before a doctor ordered it. This is usually the supplier's paperwork problem, not yours.

medium appealability Usually the provider's problem — not yours

What they're really saying

“Service was not prescribed prior to delivery.”

You got the equipment or service before a doctor ordered it. This is usually the supplier's paperwork problem, not yours.

Your odds

Worth fighting — many of these get fixed.

Often fixable if a valid order really existed — the dates are what matter.

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 174 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 the supplier for the dated order and compare it to the delivery date. Look for a dated order, chart note, or e-prescription that predates delivery. A verbal order documented in the chart often counts if the written order followed shortly after. Have the supplier resubmit with the dated order attached. If no order predated delivery, the supplier billed improperly and should not balance-bill you — tell them that in writing.
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 174 mean?: You got the equipment or service before a doctor ordered it. This is usually the supplier's paperwork problem, not yours.
Can I appeal a CO-174 or PR-174 denial?: Yes. Appealing is free and it is your legal right. For this code the odds are medium: Often fixable if a valid order really existed — the dates are what matter. Fewer than 1 in 100 denials are ever appealed — insurers count on silence.
Who has to pay after a code 174 denial?: Usually the provider's problem — not yours. 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.