Aetna · Iort · US health-plan appeal rights

Iort denied as non-formulary by Aetna?

Q: How long do I have to appeal a Aetna Iort denial?

Internal appeal window: Typically 180 days from the denial date. External review window: Typically 60–120 days after the final internal denial. The clock starts from the date on the denial letter.

Non-formulary doesn't mean uncoverable. Most plans have a formulary-exception process: the appeal needs to show the formulary alternatives are inappropriate for your specific clinical situation.

By Michael John Ryan, Founder & Privacy Officer, DenialHelp, LLC

Last reviewed 2026-05-09

Policy data current as of 2026-05-01

US health-plan appeal rights

Cite: Most US health plans have appeal rights under either the ACA, ERISA, or Medicare/Medicaid rules

Most US health plans are required by federal law to give you both an internal appeal (where the insurer reconsiders) and an external review (where an independent reviewer decides). The exact timelines and processes depend on what kind of plan you have — marketplace / employer group, self-funded, Medicare Advantage, or Medicaid MCO — but in every case there's a window after the denial during which you have the right to fight it.

Internal appeal window

Typically 180 days from the denial date

External review window

Typically 60–120 days after the final internal denial

What Aetna typically requires

Aetna considers IORT medically necessary for select early-stage breast cancer patients meeting TARGIT-A inclusion criteria: age ≥50, unifocal invasive ductal carcinoma, T1 (≤2cm), node-negative, hormone-receptor positive, HER2-negative, no extensive intraductal component. IORT may be delivered as single-fraction at lumpectomy (boost) or as primary partial-breast irradiation. Aetna considers IORT investigational/experimental for most non-breast indications (rectal, glioblastoma, sarcoma, recurrent rectal/pelvic) absent specific guideline support.

Source policy: Aetna CPB 0721 — Intraoperative Radiation Therapy (IORT) — read the policy

What works in the appeal

TARGIT-A 5-yr long-term (Vaidya BMJ 2020;370:m2836) — non-inferior local control vs WBRT for selected patients meeting TARGIT-A criteria, sustained at 12-yr follow-up (Vaidya 2024). ELIOT 5-yr + 10-yr (Veronesi Lancet Oncol 2013;14:1269; Orecchia 2021) — Italian electron IORT outcomes for selected low-risk profile. GEC-ESTRO consensus on partial-breast irradiation 2010/2024 update (Strnad). ASTRO APBI Consensus Statement 2017/update — IORT category eligibility table. NCCN Breast Cancer v2.2024 lists IORT as APBI option meeting selection criteria. For rectal IORT cite NCCN Rectal Cancer v3.2024 (locally advanced + R0 close margin) and Calvo et al EJC 2014 IORT outcomes. Document staging completion (sentinel node, IHC), final pathology with margins, multidisciplinary tumor board recommendation. Submit ABS / ASTRO / ASCO position statements where applicable.

The Aetna angle on Iort

## Why Aetna Denies Intraoperative Radiation Therapy as Non-Formulary — and How to Appeal

A non-formulary denial for Intraoperative Radiation Therapy (IORT) is procedurally unusual — IORT is a radiation procedure, not a drug — and most commonly arises when the facility or equipment used for IORT is not on Aetna's approved-provider or covered-benefit list for the specific plan, or when the procedure code is not included in the plan's schedule of covered services. Understanding the precise basis of the denial is the essential first step before constructing an appeal.

## Why This Denial Is Appealable

If IORT is covered under Aetna's clinical policy for the patient's diagnosis, a non-formulary or not-covered-service determination may reflect a billing or coding issue, a network-status issue, or an error in how the claim or prior-authorization was processed. Each of these has a different resolution pathway. If the denial reflects a genuine plan exclusion, the appeal must argue either that the exclusion violates the terms of the plan document, that an exception is warranted on medical-necessity grounds, or — for state-regulated plans — that applicable state mandates require coverage.

## Federal Appeal Framework

Internal appeal: Under ERISA §503 or state law, request a full-and-fair review within the deadline on the denial notice. In the appeal, ask Aetna to identify: (a) the specific plan provision relied on, (b) the coverage code or procedure designation at issue, and (c) whether any exception process is available.
External review: After exhausting internal appeals, file under ACA §2719 within four months of the final adverse determination. An IRO can evaluate whether the non-formulary determination was consistent with the plan terms and applicable law.
Expedited review: If surgery is imminent, request expedited processing — decisions are typically required within 72 hours.

## Documentation to Gather

Explanation of benefits and denial letter: The exact procedure code(s) and the specific plan language cited in the denial.
Treating facility's credentials: Documentation that the facility and radiation oncologist are in-network, or — if out-of-network — that no in-network facility offers IORT for this indication within a reasonable geographic distance (supporting a network-adequacy argument).
Coverage policy confirmation: Aetna's published IORT clinical policy bulletin confirming that IORT is a covered benefit for the patient's diagnosis, if applicable.
Medical-necessity letter: A letter from the treating radiation oncologist explaining why this specific facility and IORT approach are medically necessary.
Plan document review: A copy of the Summary Plan Description to confirm whether any exclusion language actually applies to IORT in this context.

## Criteria-Mapping Structure

The central task in a non-formulary appeal for a procedure is to reconcile the denial with the plan's own coverage language. If Aetna's clinical policy covers IORT for the diagnosis but the plan's schedule of benefits excludes it, that inconsistency is itself an appeal argument. Map each relevant provision side by side, note the inconsistency, and request written clarification of which governs. This record-building is valuable both for the internal appeal and for any subsequent external review or regulatory complaint.

Next steps

Find the date on the denial letter — your appeal window starts there.
Read your plan's Summary of Benefits and Coverage (SBC) for the specific deadlines.
Request the insurer's claim file in writing — they must provide it.
Submit your appeal in writing with new clinical evidence and a physician statement.

Get the letter drafted

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Related appeal guides

Other Aetna appeals

Other denial reasons for Aetna Iort

denied as not medically necessary denied for failing step therapy denied for missing prior authorization denied as experimental or investigational denied as not FDA-approved for this use

This guide describes general US federal appeal rights based on Most US health plans have appeal rights under either the ACA, ERISA, or Medicare/Medicaid rules. Your specific plan documents (Summary of Benefits and Coverage, Evidence of Coverage) override anything here. DenialHelp is not your lawyer and not your physician — we draft appeal letters that your physician signs. Outcomes depend on your insurer's decision and factors outside our control. Reviewed by Michael John Ryan on 2026-05-09. Editorial standards: denialhelp.com/authors.