Aetna · Iort · US health-plan appeal rights

Iort denied for missing prior authorization 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.

If the original prescription wasn't run through prior auth, the path is to submit a PA now with a medical-necessity letter — many plans then back-date approval to the date of service.

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

Last reviewed 2026-05-11

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 Requires Prior Authorization for Intraoperative Radiation Therapy — and How to Navigate It

A prior-authorization-required denial or administrative denial for Intraoperative Radiation Therapy (IORT) from Aetna means the procedure was either performed or requested without advance plan approval, or the authorization obtained was insufficient for the specific procedure code billed. Because IORT is typically delivered during surgery, timing is critical — authorization must be secured before the procedure, not after. If the denial is retrospective (post-service), the appeal strategy is different from a prospective one.

## Why This Denial Is Appealable

For prospective denials, the answer is straightforward: submit a complete prior-authorization request with full clinical documentation before the surgical date. For retrospective denials (where IORT was delivered without authorization, or authorization was administratively incomplete), federal and state law provide meaningful protections. Under ERISA, the plan must adjudicate the claim on its merits if the failure to obtain authorization was due to urgent medical circumstances or was caused by a plan administrative error. Many state laws also prohibit retroactive denials when the insurer failed to communicate its prior-auth requirements clearly.

## Federal Appeal Framework

Internal appeal: File under ERISA §503 or state law within the deadline on the denial notice. If the denial is purely administrative (no authorization obtained), explain the clinical urgency or the sequence of events that led to the omission.
External review: After exhausting internal appeals, escalate under ACA §2719 to an independent IRO within four months of the final adverse determination.
Expedited review: For prospective denials where surgery is imminent, request expedited prior-authorization review — decisions are typically required within 72 hours for urgent or concurrent care.
Retrospective appeal: If the service has already been rendered, the appeal must establish both administrative grounds (why auth was not obtained) and clinical grounds (why the service was medically necessary and covered).

## Documentation to Gather

Authorization request records: Any prior-authorization request submitted, the date, reference number, and any response received from Aetna.
Surgical scheduling timeline: Documentation of when the surgical procedure was scheduled and when the IORT decision was clinically finalized, to establish that the timeline did not permit standard prior-auth processing if applicable.
Treating oncologist's medical-necessity letter: A letter from the radiation oncologist and surgeon explaining why IORT is medically necessary and covered under Aetna's policy for this indication.
Diagnosis and staging: Complete pathology and staging documentation.
Aetna's published prior-auth list: Confirm IORT's status on Aetna's prior-authorization requirement list, and document whether the requirement was clearly communicated before the service date.

## Criteria-Mapping Structure

If the denial is purely administrative, the appeal letter should combine a procedural argument (explaining the authorization gap) with a substantive medical-necessity argument (demonstrating that IORT would have been authorized had the request been submitted). Treat the appeal as a complete authorization request embedded in a retrospective claim review — include every clinical document Aetna would need to approve the service prospectively, and request that the claim be adjudicated on its clinical merits.

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 as non-formulary 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 2026-05-11. Editorial standards: denialhelp.com/authors.