How to appeal a Radiofrequency Ablation (Facet / Medial Branch) denial
RFA is high-dollar and heavily prior-authorized, denials almost always cite the diagnostic-block requirement (usually two positive blocks) or level/frequency limits before the payer will cover the ablation.
Common code: CPT 64633-64634 (cervical/thoracic), 64635-64636 (lumbar/sacral)Why it gets denied
- The payer requires one or two prior positive diagnostic medial-branch blocks and they weren't documented
- Prior authorization was missing or didn't match the levels ablated
- More levels were billed than the policy covers, or repeat ablation was within the frequency lockout
- The diagnosis or prior-injection history doesn't meet the RFA LCD
What overturns it
- Submit the diagnostic-block results (percentage and duration of relief) that satisfy the two-block requirement
- Obtain the prior auth for the exact levels and link it to the claim
- Document each level ablated and show the timing meets the repeat-ablation policy
- Cite the LCD and the injection history that establish RFA candidacy
Worth appealing? RFA is one of the highest-value pain procedures, and denials are systematic (they're policy-driven, not clinical), so they're very recoverable once the block documentation and level mapping are assembled.
Common questions
How do I appeal a Radiofrequency Ablation (Facet / Medial Branch) denial?
RFA is high-dollar and heavily prior-authorized, denials almost always cite the diagnostic-block requirement (usually two positive blocks) or level/frequency limits before the payer will cover the ablation. To overturn it: submit the diagnostic-block results (percentage and duration of relief) that satisfy the two-block requirement; obtain the prior auth for the exact levels and link it to the claim; document each level ablated and show the timing meets the repeat-ablation policy; cite the LCD and the injection history that establish RFA candidacy.
Why do Radiofrequency Ablation (Facet / Medial Branch) claims get denied?
The payer requires one or two prior positive diagnostic medial-branch blocks and they weren't documented; Prior authorization was missing or didn't match the levels ablated; More levels were billed than the policy covers, or repeat ablation was within the frequency lockout; The diagnosis or prior-injection history doesn't meet the RFA LCD.
Is a Radiofrequency Ablation (Facet / Medial Branch) denial worth appealing?
RFA is one of the highest-value pain procedures, and denials are systematic (they're policy-driven, not clinical), so they're very recoverable once the block documentation and level mapping are assembled. You pay 25% only on what's recovered, so there's no cost to working the winnable ones.
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