How to Get Insurance to Cover Radiofrequency Ablation for Back or Neck Pain

Written by Aptiva Health Editorial Team · Medically reviewed by Thomas Huhn, MD · Clinically reviewed by Simon Hoehn, DPT, PT · Reviewed by Crystal Brake, RCM Director and Taylor Sorrels, Esq. · Editorial & review standards · How we research

Radiofrequency ablation (RFA) uses heat to quiet the small nerves that carry pain signals from the facet joints in your spine. It is often used for long-lasting neck or low back pain that comes from those joints, not from a pinched nerve. It is also called a radiofrequency neurotomy or facet denervation.

Plans review RFA closely. Most want proof, from test injections called medial branch blocks, that the facet joints are the source of your pain. This guide explains what plans usually look for, how repeat ablations are handled, and how to appeal a denial. It is part of the Coverage & Appeals Center.

Why RFA gets denied

• Not medically necessary. The records didn’t show the plan’s criteria. See not medically necessary denials.
• No prior authorization, or approval for a different level or side. See missing prior authorization.
• Test blocks missing or not strong enough. The plan wants two test blocks with enough relief, recorded in your chart.
• Repeat RFA not supported. The plan wants proof the last ablation helped, and for how long.
• Too many sessions. The plan limits how often RFA can be done in a year.
• Conservative care not documented. The plan wants proof that physical therapy, medicine or other care came first.

What plans usually look for

Each plan has its own written policy for spine pain procedures. Many plans also use a separate company to review them.

The criteria below are common examples only, not rules for your plan. Ask your plan for its exact policy.

• Long-lasting pain, mostly in the spine. Medicare’s local policies for Kentucky and Indiana describe moderate to severe neck or low back pain, mainly in the spine itself rather than down a leg, that limits function on a pain or disability scale (CMS: LCD L38773, Kentucky; CMS: LCD L38841, Indiana).
• Pain for at least 3 months, with conservative care tried first. The same Medicare policies ask for pain for at least 3 months with “documented failure to respond to noninvasive conservative management (as tolerated).” They list physical therapy among those treatments, along with medicines such as NSAIDs or acetaminophen, acupuncture for low back pain, and spinal manipulation. One commercial payer, Aetna, asks for at least 6 months of severe pain and 6 or more weeks of conservative treatment (Aetna CPB 0016).
• Image guidance. The Medicare policies say facet procedures done without CT or fluoroscopy (live X-ray) guidance are not reasonable and necessary.
• Other causes ruled out. For example, Aetna’s policy asks that imaging not confirm a disc herniation and that there is no instability that needs surgery (Aetna CPB 0016).

Test nerve blocks first (medial branch blocks)

A medial branch block numbs the small nerves to the facet joint for a few hours. If your usual pain mostly goes away, that suggests RFA of those nerves may help.

A common example: the Medicare policies for Kentucky and Indiana ask for two test blocks, each giving at least 80% relief of your main pain, lasting about as long as the numbing medicine should last. Aetna’s policy uses the same two-block, 80% example (CMS: LCD L38773; Aetna CPB 0016). Other plans may differ.

The Medicare policies also ask that pain be scored before each test block and again after, using the same scale each time. So it helps to keep track of your pain in the hours after each block, and to tell your clinician’s office exactly how much relief you had and for how long.

Repeat RFA

The nerves can grow back, so pain may return. Plans often want proof the last RFA worked before approving another. Common examples:

• Medicare (Kentucky and Indiana): at least 50% pain improvement lasting at least 6 months, or better ability to do daily activities measured on the same scale, and no more than 2 RFA sessions per spine region in a rolling 12 months (CMS: LCD L38773; CMS: LCD L38841).
• Aetna, as one payer’s example: more than 50% relief for at least 12 weeks, at least 6 months between treatments at the same level and side, and no more than twice per rolling calendar year (Aetna CPB 0016).

Ask your clinician’s office to record your pain and function scores before and after each RFA. Without them, a repeat RFA is harder to approve.

Guidelines your clinician may cite

The American Society of Interventional Pain Physicians (ASIPP) published guidelines for facet joint interventions in 2020. ASIPP reports moderate-strength evidence for radiofrequency neurotomy in the low back and neck, and for diagnostic facet nerve blocks (ASIPP: facet guidelines, 2020). Your clinician can cite the guideline that fits your case.

Medicare prior authorization for facet procedures

If you have Traditional Medicare and the procedure is done in a hospital outpatient department, prior authorization has been required for facet joint interventions since July 1, 2023 (CMS: OPD prior authorization). The hospital asks for it.

Medicare Advantage plans must follow the 2026 federal prior authorization timelines: 72 hours for urgent requests and 7 calendar days for standard requests (CMS: CMS-0057-F fact sheet).

What to ask your clinician to document

1. Where the pain is, and that it is mainly in the neck or back.
2. How long you have had it and how it limits daily life, with a pain or disability score.
3. Exam findings and imaging results, if any.
4. Treatments tried, such as physical therapy and medicine, for how long, and the result.
5. For each test block: the date, the levels, your pain score before and after, the percent relief, and how long it lasted.
6. For a repeat RFA: your scores before and after the last RFA and how long relief lasted.

How to get RFA covered

1. Confirm prior authorization is requested. Ask the clinician’s office for the request date and reference number.
2. Get the plan’s policy. Ask for the criteria for facet RFA, including test blocks and repeat RFA.
3. Track your relief after each test block. Write down your pain score before and after, and how long relief lasted.
4. Check your chart against the policy. Make sure pain duration, prior treatment and block results are documented.
5. For a repeat RFA, record your results. Make sure the relief from the last RFA, and how long it lasted, is in your chart.
6. Match the approval to the procedure. The approved levels, side and spine region should match what is scheduled.
7. If denied, ask for a peer-to-peer and appeal. File an internal appeal with your clinician’s letter before the deadline (29 CFR 2560.503-1(h)(3)(i)).

Checklist before your RFA is scheduled

• Prior authorization approved, with a reference number
• Two test block results in your chart, with before-and-after pain scores
• Physical therapy and other treatment dates in your chart
• Approved levels, side and spine region match the schedule
• For a repeat RFA: relief from the last RFA, and how long it lasted, in your chart
• The date fits any yearly session limit
• You have a written cost estimate

What the approval should match

Sample appeal letter

You can fill in this letter by hand, or build one with the Appeal Letter Builder.

[Your name]
[Your address] · [Your phone] · [Your email]

[Date]

[Plan name or review company] — Appeals Department
[Address or fax from your denial letter]

RE: Appeal of radiofrequency ablation denial
Member name: [Name] · Member ID: [Number]
Reference / case number: [Number]
Procedure: [e.g., lumbar facet radiofrequency ablation, L4-L5 and L5-S1, right]
Ordering clinician: [Name, credentials]
Date of denial: [Date]

To the Appeals Department:

I am appealing your denial of the procedure listed above. Your letter says: "[exact reason]."

I meet your criteria, [policy name or number]:
- Pain: mainly [neck / low back] pain since [date], [score] on [scale] — see [record, date].
- Treatment tried first: [physical therapy, dates; medicine; other] — see [records].
- First test block on [date]: [percent] relief of my usual pain, lasting [hours] — see [record].
- Second test block on [date]: [percent] relief, lasting [hours] — see [record].
[For a repeat RFA:]
- Result of my last RFA on [date]: [percent] pain relief lasting [months], with [function change] — see [record].

My clinician's enclosed letter explains why RFA is medically necessary.

Enclosed:
- Letter of medical necessity from [clinician]
- Visit notes and therapy records from [dates]
- Procedure notes and pain scores for each test block
- Your denial letter

Please approve the procedure. If you uphold the denial, please give me the specific reason, the criteria used, and the steps for external review in writing.

Sincerely,
[Signature]
[Printed name]

Deadlines

Medicare has its own appeal steps (Medicare.gov: Original Medicare appeals; Medicare.gov: Medicare Advantage appeals).

To work out your own dates, try the Appeal Deadline Calculator. See Kentucky and Indiana for state steps.

What the process looks like

1. Your clinician suspects facet joint pain and documents your pain, exam and treatment so far.
2. You have the first test block. You track your relief.
3. You have the second test block, often on another day. You track your relief again.
4. The office requests prior authorization for RFA for the exact levels and side.
5. The plan reviews it against its policy. Plans covered by the 2026 federal rule must decide within 7 calendar days, or 72 hours if urgent.
6. If approved, you schedule the RFA within the approved dates.
7. Afterward, your pain and function are recorded at follow-up. These numbers matter for any repeat RFA.

Test blocks may need their own prior authorization. Ask before each one.

An example

*This is an illustrative example, not a real patient.*

Lee has had low back pain for a year. Physical therapy and medicine helped a little. Lee’s clinician did two test blocks. After each, Lee’s pain dropped from 7 to 1 for about six hours. The plan denied RFA anyway: “diagnostic block response not documented.”

The chart said only “good relief.” Lee had written down the scores on a phone after each block. Lee’s clinician added the before-and-after scores and the hours of relief to the chart and wrote a letter. With those details, Lee appealed.

The lesson: write down your pain score and how long relief lasts after each test block, and make sure it is in your chart.

Questions to ask before your RFA

• “Do the test blocks need prior authorization too?”
• “How will my relief after each block be recorded?”
• “Has the RFA been approved? What is the reference number?”
• “Does the approval match the levels, side and region planned?”
• “How many RFAs will my plan cover in a year?”
• “What is my cost after insurance, and is there a cash-pay price?”

Common mistakes

• No before-and-after scores for the test blocks. This is a common reason RFA is denied.
• Only one test block when the plan asks for two.
• Approval for a different level or side than the one treated.
• Repeat RFA too soon, before the plan’s time limit.
• Skipping the appeal because the RFA already happened. You can usually still appeal.

If RFA is denied

Read the denial letter closely. The Denial Decoder can help you understand the codes and wording.

Since January 1, 2026, Medicare Advantage, Medicaid, CHIP and HealthCare.gov Marketplace plans must give a specific reason when they deny a prior authorization request (CMS: CMS-0057-F fact sheet). A vague reason makes an appeal harder, so it is fair to ask for more detail.

Check that the letter tells you:

• The exact service that was denied and the date.
• The specific reason, in words you can act on.
• The policy or criteria the plan used. If it doesn’t, ask for a free copy (29 CFR 2560.503-1(g)(1)(v); 45 CFR 147.136(b)).
• Your deadline to appeal and how to send it.
• How to ask for an expedited review if it’s urgent.
• How to ask for an external review if the internal appeal fails.

If anything is missing, call the plan, ask for it in writing, and write down the date, the name of the person you spoke with, and a reference number.

Costs and your deductible while you wait

An appeal can take weeks. Meanwhile, it helps to understand what you might owe either way.

• If the appeal succeeds, the plan pays under your normal benefits. You still owe any deductible, copay or coinsurance.
• If you go ahead before a decision, you may owe the full bill if the appeal fails. Ask for a written cost estimate first.
• Check your EOB (explanation of benefits) when the claim is processed. It shows what was billed, allowed and owed.
• Ask about payment plans if a large bill arrives during the appeal. Ask the billing office to hold the account while the appeal is open.

If coverage doesn’t work out

• Ask for an external review after a final internal denial.
• Ask about a cash-pay price, and get it in writing.
• Talk with your clinician about other treatment while you appeal, such as physical therapy.