Aetna · Npwt · US health-plan appeal rights

Npwt denied for failing step therapy by Aetna?

Q: How long do I have to appeal a Aetna Npwt 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.

Step-therapy denials usually flip when the appeal documents that prior alternatives were tried and failed, or were contraindicated, or aren't safe for the patient.

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

Last reviewed 2026-05-09

Policy data current as of 2026-04-26

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

Mirrors CMS LCD L33821: Stage 3-4 pressure ulcer, neuropathic (DFU), venous insufficiency, arterial, traumatic, or chronic (>30 days) wound; or dehisced surgical wound; or flap/graft. Complete wound therapy program (debridement, offloading, infection control, optimal dressings, perfusion assessment, nutrition) tried first. Initial 4 months of NPWT covered; extension requires documentation of wound-volume reduction.

Source policy: Aetna Clinical Policy Bulletin 0334: Negative Pressure Wound Therapy — read the policy

What works in the appeal

LCD L33821 4-month cap allows extension when wound is improving — submit serial L x W x D + photographs + physician attestation of ongoing necessity. Stage 2 pressure ulcers + superficial DFU do qualify if chronic >30 days. Cite Armstrong & Lavery Lancet 2005;366:1704-1710 (post-amputation DFU 56% vs 39% closure, p=0.040; faster granulation p=0.002) + Blume Diabetes Care 2008;31:631 (DFU 43.2% vs 28.9% closure). Document complete wound therapy program with dates + outcomes per LCD documentation requirements.

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

DenialHelp drafts your appeal in 5 minutes — $40 list price, $30 for your first letter (use code SEO25). We cite the federal regs and the specific clinical evidence your plan responds to. Your physician signs and sends.

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Related appeal guides

Other Aetna appeals

Other denial reasons for Aetna Npwt

denied as not medically necessary 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 2026-05-09. Editorial standards: denialhelp.com/authors.