835 Denial Combination

CO-241

CO

Contractual Obligation · Claim-Level Adjustment

Patient Responsibility

What This Combination Means

This combination indicates a co-payment amount associated with a Low Income Subsidy (LIS) beneficiary under Medicare Part D. The CO group code creates an apparent conflict because CO typically requires provider write-off, but CARC 241 indicates patient responsibility for the LIS co-payment amount. In practice, this represents the subsidized co-payment amount that the LIS-eligible patient owes, which is typically a reduced amount compared to standard co-payments.

Financial Responsibility

patient responsibility

The patient owes the Low Income Subsidy co-payment amount shown. This is a reduced co-payment for LIS-eligible Medicare Part D beneficiaries, and while marked CO, the patient remains responsible for this specific subsidized amount.

N/A

Appeal Success

Immediate (patient billing)

Avg. Resolution

Easy

Difficulty

No

Appealable

Step-by-Step Resolution

Steps tailored specifically to this CO-241 combination — not generic advice.

Not Appealable:This represents a contractually-defined LIS co-payment amount that is calculated according to Medicare Part D subsidy rules and is not subject to appeal.
  1. 1

    Verify patient's LIS eligibility status in Medicare Part D system

    Confirm the beneficiary qualifies for Low Income Subsidy to ensure proper co-payment calculation

  2. 2

    Bill the patient for the exact LIS co-payment amount shown on the ERA

    This is the subsidized co-payment the LIS-eligible patient owes, not the standard co-payment amount

  3. 3

    Document the adjustment in the patient account as LIS co-payment

    Ensure proper categorization for tracking subsidized patient responsibility amounts

Specialty Context

How CO-241 typically presents across different practice types.

Dental

Medical

Applies primarily to Medicare Part D prescription drug coverage for LIS-eligible beneficiaries; may appear in medical billing when Part D-covered medications are dispensed in clinical settings

Behavioral Health

Relevant when Medicare Part D covers behavioral health medications for LIS-eligible patients

Individual Code References

View the standalone definition for each code in this combination.

CARC 241

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Synthesized from official definitions — not from training data

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