Aetna · Iort · US health-plan appeal rights

Iort denied as not medically necessary 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.

Most insurers reverse a medical-necessity denial when the appeal cites the specific clinical guideline (NCCN, ADA, AACE, etc.) that supports the requested treatment for your indication.

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

Last reviewed 2026-05-10

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 for Medical Necessity — and How to Appeal

A medical-necessity denial for Intraoperative Radiation Therapy (IORT) from Aetna means the plan has determined that the clinical record submitted does not establish that IORT is medically required for this patient's specific diagnosis and clinical circumstances, as defined by Aetna's coverage policy. This is the most common type of IORT denial and is frequently overturned when the appeal includes a structured, criterion-by-criterion response backed by complete clinical documentation.

## Why This Denial Is Appealable

Aetna's medical-necessity determination is based on criteria it has published in its clinical policy bulletin. If the treating oncologist's clinical assessment supports IORT and the patient's tumor characteristics, anatomy, comorbidities, or treatment goals align with recognized indications for IORT, the denial reflects a documentation gap rather than a clinical one — and documentation gaps can be corrected on appeal. The oncology team is positioned to make a compelling case that goes beyond what was included in the initial authorization request.

## Federal Appeal Framework

Internal appeal: Under ERISA §503 or applicable state law, you are entitled to a full-and-fair internal review. File within the deadline on the denial notice. Request the specific Aetna clinical policy and the exact criteria that were not satisfied.
External review: If the internal appeal is denied, escalate under ACA §2719 to an independent IRO within four months of the final adverse determination. External reviewers are independent oncologists who apply their own clinical judgment, not Aetna's internal criteria.
Expedited review: When surgery is scheduled and delay would compromise the surgical plan or patient safety, request expedited review — decisions are typically required within 72 hours.

## Documentation to Gather

Diagnosis and staging: Pathology report, imaging, and staging summary confirming the tumor type, size, grade, margin status, and anatomical location relevant to the IORT indication.
Clinical rationale letter: A detailed letter from the treating radiation oncologist and/or surgeon explaining why IORT is medically necessary for this patient, addressing the specific criteria in Aetna's coverage policy.
Surgical plan: The operative plan showing that IORT is integrated into the procedure and cannot be substituted with a post-operative course of treatment without clinical compromise.
Comorbidity and patient-factor documentation: Records of any patient factors — such as anatomical considerations, comorbidities, or patient circumstances — that make IORT the clinically appropriate choice.
Applicable guideline support: Reference to the relevant professional society guideline (ASTRO, NCCN, or SSO) that supports IORT in this clinical scenario.

## Criteria-Mapping Structure

Download Aetna's current IORT clinical policy bulletin. Create a table with two columns: the left lists each coverage criterion verbatim; the right cites the specific page, date, and finding in the clinical record that satisfies it. Where a criterion references the applicable professional guideline, confirm in writing that the treating clinician's recommendation is consistent with that guideline. Submit this mapping as the centerpiece of the appeal letter — it forces the internal reviewer to address the evidence directly rather than issue a form denial.

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 for failing step therapy denied as non-formulary 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 2026-05-10. Editorial standards: denialhelp.com/authors.