CO-27 means the insurer says your coverage had already ended by the date you received care. It's often wrong or incomplete — COBRA elections, reinstatements, and payment timing frequently aren't reflected yet.
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The plain English translation — and why "terminated" isn't always the final word.
CO-27 means the payer's records show your coverage ended before the date of the service being billed. This is triggered by job loss, a dependent aging off a parent's plan, divorce removing spousal coverage, missed premium payments, or simply reaching the end of a plan year without renewal.
What CO-27 does not always account for: continuation coverage options and grace periods that can restore or extend coverage retroactively. COBRA continuation coverage, for example, is retroactive to the day immediately after your prior coverage ended — meaning if you elect COBRA within your 60-day election window, your coverage legally existed on the date of service even though the payer's system may not reflect it yet.
This makes CO-27 one of the denial codes where timing and continuation elections matter enormously — the underlying facts can look very different from what the insurer's system currently shows.
"Terminated" in the payer's system doesn't always mean "uninsured" at the time of care.
COBRA continuation coverage is retroactive to the day after your employer-based coverage ended, and you have up to 60 days to elect it. If you elect COBRA within that window, your coverage legally applies to the date of service even if the payer's system currently shows a termination. This is one of the strongest and most common reversals for CO-27.
Many plans have a grace period for late premium payments, and a payment submitted before the due date can sometimes be processed by the insurer after the termination was already triggered in their system. Proof of timely payment — a bank statement, confirmation number, or receipt — can directly reverse a termination-based denial.
Employers sometimes submit an incorrect termination date to the insurer, or a termination is corrected or reversed (through an employer's own appeal or a data correction) but the fix never reaches the payer's system. A written correction from your employer or HR department showing the accurate termination or reinstatement date resolves this directly.
Four steps that consistently resolve coverage-termination denials.
Verify exactly when your coverage ended according to your employer or plan, and whether COBRA, state continuation coverage, or another continuation option is available to you. This determines your entire path forward.
If COBRA applies, confirm whether you've already elected it, and if not, how much of your 60-day election window remains. Electing COBRA retroactively restores coverage back to the day after your prior plan ended — covering the date of service in question.
Collect bank records, payment confirmations, or written correspondence from your employer or HR department showing timely premium payment or a corrected termination date. Written, dated proof is what actually resolves this — not a phone call alone.
Send your documentation directly to the eligibility team (not just claims), explicitly requesting that your coverage record be corrected and the claim reprocessed. Fixing the underlying eligibility record resolves any other claims affected by the same error at once.
Because continuation coverage options are retroactive by design, cases where COBRA was or can still be elected succeed at high rates. Cases with no continuation option and a confirmed termination are much harder to reverse.
Upload your denial letter. ClaimCompass checks your COBRA eligibility, reinstatement options, and generates the correction request you need to get this claim covered.
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