Quick Explanation
Denial code CO-98 indicates that the patient has reached the maximum allowable benefit limit under their insurance policy for the billed service, time frame, or category. Once these policy caps—such as annual visit limits for therapy or maximum lifetime hospital days—are met, the insurer denies payment, often transferring financial responsibility to the patient or secondary coverage.
Common Causes for CO-98
Denials with code CO-98 typically happen for the following specific reasons:
- The patient has exceeded the maximum number of allowed visits for specialty services, such as physical, occupational, or chiropractic therapy, within the calendar or benefit year.
- The patient has exhausted their lifetime reserve days or maximum covered days during a prolonged inpatient hospital stay.
- The annual or lifetime maximum dollar amount allocated for specific benefits, such as durable medical equipment (DME) or orthotics, has been fully utilized.
- Multiple providers billed for overlapping limit-capped services, exhausting the benefit pool before the current claim was processed.
How to Prevent CO-98 Denials
To avoid receiving this denial in the future, implement these specific checks:
- Perform comprehensive real-time eligibility and benefit verification prior to rendering services to ascertain the exact remaining benefit balance.
- Implement a robust internal tracking mechanism to monitor visit counts and cumulative billing totals for patients undergoing long-term treatment plans.
- Secure a signed Advanced Beneficiary Notice (ABN) or a commercial patient financial liability waiver before services are rendered if benefit exhaustion is anticipated.
- Coordinate with secondary insurers or supplemental policies early in the care cycle to ensure seamless transition of billing responsibility once primary benefits are depleted.
Appeal Letter Template for CO-98
If you believe this claim was denied incorrectly, you can use the following template to submit an appeal.
[Your Practice Header]
[Date]
[Payer Name]
[Appeals Department Address]
RE: Appeal for Claim [Claim Number]
Patient: [Patient Name]
ID: [Patient ID]
Date of Service: [Date]
Denial Code: CO-98 - Benefits exhausted
Dear Appeals Department,
I am writing to appeal the denial of the above-referenced claim, which was denied with code CO-98: "Benefits exhausted".
We are formally appealing the denial under code CO-98 (Benefits exhausted) for the services rendered. While we acknowledge the primary policy limits, clinical documentation establishes that the continued treatment was medically necessary and met all diagnostic and therapeutic thresholds, as outlined in CMS Medicare Benefit Policy Manual guidelines or the payer's specific medical necessity policies. Furthermore, we request a manual review to verify if the patient's benefit period has reset, if an exception or extension applies under complex care provisions, or if the claim can be routed to the documented secondary insurer. The attached medical records substantiate the patient's critical need for ongoing intervention to prevent severe clinical regression, and we request that this claim be reprocessed for payment.
Attached please find:
1. A copy of the original claim.
2. The relevant medical records supporting the service.
3. [Any other supporting documents].
We respectfully request that you reprocess this claim for payment.
Sincerely,
[Your Name]
[Title]
[Practice Name]
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