Quick Explanation
This denial indicates that the billed services were rejected because the payer's system shows the patient was not actively enrolled in a hospice program on the date of service. It typically occurs when hospice-specific codes, revenue codes, or modifiers are submitted for a patient without an active hospice election on file. To resolve this, providers must verify the patient's insurance eligibility and hospice enrollment status.
Common Causes for CO B9
Denials with code CO B9 typically happen for the following specific reasons:
- Submitting hospice-specific HCPCS codes or revenue codes (Type of Bill 81X or 82X) for a patient who does not have an active hospice election.
- Incorrectly appending Medicare hospice modifiers such as GV (attending physician not employed by hospice) or GW (service unrelated to hospice) when the patient is not enrolled in hospice.
- A delay in the payer's database or Common Working File (CWF) updating the patient's hospice revocation or discharge status.
- Billing for palliative care services using institutional hospice formats instead of standard professional or outpatient billing guidelines.
How to Prevent CO B9 Denials
To avoid receiving this denial in the future, implement these specific checks:
- Verify the patient's active hospice election status and benefit periods through the Medicare Common Working File (CWF) or commercial payer portal prior to billing.
- Establish strict front-end billing edits to prevent the submission of modifiers GV and GW unless hospice enrollment is actively verified in the patient's file.
- Ensure proper coordination between the billing department and the clinical team to verify if the patient has revoked hospice care or been discharged prior to the date of service.
- Confirm that the correct Type of Bill (TOB) and CMS-1500 or UB-04 claim formats are utilized based on the patient's non-hospice status.
Appeal Letter Template for CO B9
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 B9 - Not covered because patient not enrolled in hospice
Dear Appeals Department,
I am writing to appeal the denial of the above-referenced claim, which was denied with code CO B9: "Not covered because patient not enrolled in hospice".
We are appealing the denial of this claim under code CO B9 (Not covered because patient not enrolled in hospice). The services provided on the designated date of service were standard, medically necessary treatments and were not part of a hospice plan of care, as the patient was not enrolled in a hospice program at that time. Pursuant to CMS Medicare Claims Processing Guidelines, claims for patients not enrolled in hospice must be processed under standard Medicare Part B or traditional medical benefits. The attached medical records and eligibility verification confirm that the patient did not have an active hospice election on this date. We respectfully request that you update the patient's enrollment status in your system and reprocess this claim for full reimbursement.
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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