Who has to pay after a code 241 denial?

Usually your cost to pay. 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 241

Denial code 241: what it means — and how to fight it

Denial code 241 (shown on your EOB as CO-241 or PR-241) means: “Low Income Subsidy (LIS) Co-payment Amount.” In plain English: This is your reduced drug copay under Medicare Extra Help. It is lower than the standard amount, not a denial.

low appealability Usually your cost to pay

What they're really saying

“Low Income Subsidy (LIS) Co-payment Amount.”

This is your reduced drug copay under Medicare Extra Help. It is lower than the standard amount, not a denial.

Your odds

Check the math first — this is usually cost-sharing, not a judgment.

Not a denial — but wrong subsidy levels are common and worth checking.

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 241 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.
Verify your Extra Help level with Social Security or your Part D plan. Confirm the copay matches your assigned subsidy level; if you qualify for full Extra Help the amounts are capped low and change every year. If you were charged more than your level allows, ask the pharmacy to recheck your subsidy status in the system, then call your Part D plan to fix the level and refund the overcharge. Best Available Evidence rules require the plan to accept your proof of subsidy status even if its own file is wrong.
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 241 mean?: This is your reduced drug copay under Medicare Extra Help. It is lower than the standard amount, not a denial.
Can I appeal a CO-241 or PR-241 denial?: Yes. Appealing is free and it is your legal right. For this code the odds are low: Not a denial — but wrong subsidy levels are common and worth checking. Fewer than 1 in 100 denials are ever appealed — insurers count on silence.
Who has to pay after a code 241 denial?: Usually your cost to pay. 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.