# AppealArmor — Free AI Appeal Letters for Health Insurance Denials
# https://appealarmor.com
# Last Updated: 2026-05-25

> AppealArmor is a free, public-benefit tool that generates legally-sound health insurance appeal letters in under 60 seconds. It analyses a denial letter, runs 11 parallel queries across a 2,829-entry Living Knowledge Base (insurer-specific intelligence, CMS coverage determinations, landmark court citations, clinical evidence, state-level filing rules), and produces a Word document plus a state-commissioner complaint letter. No signup, no credit card.

## About AppealArmor

- **Founders:** Stuart Kerr (AI researcher) and June Kerr.
- **Origin story:** The Kerrs are parents of triplets who underwent 16 surgeries between them. After repeatedly fighting insurance denials, they built the tool the system never gave them.
- **Position:** Free for patients. Paid practice portal for clinics and patient-advocate teams.
- **Tech base:** Hybrid BM25 + HNSW semantic retrieval, 753-node knowledge graph (1,405 edges), live CMS Coverage / RxNorm / DailyMed API integration, outcome learning loop refreshing winning patterns every 4 hours.

## Core Pages

- [Homepage — generate an appeal letter](https://appealarmor.com/)
- [Start (guided onboarding)](https://appealarmor.com/start/)
- [Resources (all guides + tools)](https://appealarmor.com/resources.html)
- [Articles index](https://appealarmor.com/articles/)
- [Deadline calculator](https://appealarmor.com/tools/deadline-calculator/)
- [Demo appeal packet](https://appealarmor.com/demo-packet.html)
- [Practice portal (for clinics)](https://appealarmor.com/practice-portal.html)
- [Privacy](https://appealarmor.com/privacy.html)
- [Terms](https://appealarmor.com/terms.html)

## Appeal Type Hubs

- [Medical Necessity Appeals](https://appealarmor.com/appeal/medical-necessity/)
- [Prior Authorization Appeals](https://appealarmor.com/appeal/prior-authorization/)
- [Out-of-Network Appeals](https://appealarmor.com/appeal/out-of-network/)
- [Experimental / Investigational Appeals](https://appealarmor.com/appeal/experimental/)
- [Mental Health Parity Appeals](https://appealarmor.com/appeal/mental-health/)
- [Ozempic / GLP-1 Step Therapy Appeals](https://appealarmor.com/appeal/ozempic-step-therapy/)

## Insurer-Specific Appeal Guides

- [UnitedHealthcare](https://appealarmor.com/appeal/unitedhealthcare/)
- [Anthem (Elevance)](https://appealarmor.com/appeal/anthem/)
- [Aetna (CVS Health)](https://appealarmor.com/appeal/aetna/)
- [Cigna (The Cigna Group)](https://appealarmor.com/appeal/cigna/)
- [Humana](https://appealarmor.com/appeal/humana/)
- [Kaiser Permanente](https://appealarmor.com/appeal/kaiser-permanente/)
- [Molina Healthcare](https://appealarmor.com/appeal/molina-healthcare/)

## Insurer × Denial-Reason Combinations (hyper-niche)

- [UnitedHealthcare — Prior Authorization](https://appealarmor.com/appeal/unitedhealthcare-prior-authorization/)
- [UnitedHealthcare — Medical Necessity](https://appealarmor.com/appeal/unitedhealthcare-medical-necessity/)
- [UnitedHealthcare — Out-of-Network](https://appealarmor.com/appeal/unitedhealthcare-out-of-network/)
- [UnitedHealthcare — Ozempic](https://appealarmor.com/appeal/unitedhealthcare-ozempic/)
- [Anthem — Prior Authorization](https://appealarmor.com/appeal/anthem-prior-authorization/)
- [Anthem — Medical Necessity](https://appealarmor.com/appeal/anthem-medical-necessity/)
- [Anthem — Experimental Treatment](https://appealarmor.com/appeal/anthem-experimental-treatment/)
- [Aetna — Prior Authorization](https://appealarmor.com/appeal/aetna-prior-authorization/)
- [Aetna — Medical Necessity](https://appealarmor.com/appeal/aetna-medical-necessity/)
- [Cigna — Prior Authorization](https://appealarmor.com/appeal/cigna-prior-authorization/)
- [Cigna — Mental Health](https://appealarmor.com/appeal/cigna-mental-health/)
- [BCBS — Prior Authorization](https://appealarmor.com/appeal/bcbs-prior-authorization/)
- [BCBS — Out-of-Network](https://appealarmor.com/appeal/bcbs-out-of-network/)
- [Humana — Medicare Advantage](https://appealarmor.com/appeal/humana-medicare-advantage/)
- [Kaiser — Out-of-Network](https://appealarmor.com/appeal/kaiser-out-of-network/)
- [Medicare Advantage — General Denial](https://appealarmor.com/appeal/medicare-advantage-denial/)
- [Medicaid — Prior Authorization](https://appealarmor.com/appeal/medicaid-prior-authorization/)

## Drug-Specific Appeal Guides

- [Ozempic — Step Therapy Override](https://appealarmor.com/appeal/ozempic-step-therapy/)
- [Wegovy — Prior Authorization](https://appealarmor.com/appeal/wegovy-prior-authorization/)
- [Mounjaro — Prior Authorization](https://appealarmor.com/appeal/mounjaro-prior-authorization/)
- [Zepbound — Coverage Denial](https://appealarmor.com/appeal/zepbound-coverage-denial/)

## State Appeal Guides

State-level filing deadlines, external review processes, and insurance commissioner contacts. (10 of 50 states currently published; the remaining 40 are in build.)

- [California](https://appealarmor.com/states/california/)
- [Texas](https://appealarmor.com/states/texas/)
- [Florida](https://appealarmor.com/states/florida/)
- [New York](https://appealarmor.com/states/new-york/)
- [Illinois](https://appealarmor.com/states/illinois/)
- [Pennsylvania](https://appealarmor.com/states/pennsylvania/)
- [Ohio](https://appealarmor.com/states/ohio/)
- [Georgia](https://appealarmor.com/states/georgia/)
- [North Carolina](https://appealarmor.com/states/north-carolina/)
- [Michigan](https://appealarmor.com/states/michigan/)

## Articles & Long-Form Guides

### Medical Necessity
- [What is medical necessity in insurance?](https://appealarmor.com/articles/medical-necessity/what-is-medical-necessity-insurance.html)
- [How to prove medical necessity](https://appealarmor.com/articles/medical-necessity/how-to-prove-medical-necessity.html)
- [Sample medical-necessity appeal letter](https://appealarmor.com/articles/medical-necessity/medical-necessity-appeal-letter-sample.html)
- [Medical necessity vs experimental treatment](https://appealarmor.com/articles/medical-necessity/medical-necessity-vs-experimental-treatment.html)
- [State medical-necessity requirements](https://appealarmor.com/articles/medical-necessity/state-medical-necessity-requirements.html)
- [Medical-necessity denial success stories](https://appealarmor.com/articles/medical-necessity/medical-necessity-denial-success-stories.html)

### Prior Authorization
- [Prior-authorization appeal process](https://appealarmor.com/articles/prior-authorization/prior-authorization-appeal-process.html)
- [Step-therapy requirements appeal](https://appealarmor.com/articles/prior-authorization/step-therapy-requirements-appeal.html)
- [Ozempic prior-authorization denied — what to do](https://appealarmor.com/articles/prior-authorization/ozempic-prior-authorization-denied.html)
- [Urgent prior-auth appeal (72-hour timeline)](https://appealarmor.com/articles/prior-authorization/urgent-prior-auth-appeal-72-hours.html)
- [Prior-auth vs predetermination](https://appealarmor.com/articles/prior-authorization/prior-auth-vs-predetermination.html)
- [Prior-authorization appeal letter template](https://appealarmor.com/articles/prior-authorization/prior-authorization-appeal-letter-template.html)

### Out-of-Network & Surprise Billing
- [No Surprises Act explained](https://appealarmor.com/articles/out-of-network/no-surprises-act-explained.html)
- [Emergency room surprise bills](https://appealarmor.com/articles/out-of-network/emergency-room-surprise-bills.html)
- [Out-of-network anesthesiologist during surgery](https://appealarmor.com/articles/out-of-network/out-of-network-anesthesiologist-surgery.html)
- [Independent dispute resolution (IDR) process](https://appealarmor.com/articles/out-of-network/independent-dispute-resolution-process.html)
- [Surprise medical bill success stories](https://appealarmor.com/articles/out-of-network/surprise-medical-bill-success-stories.html)

### UnitedHealthcare-Specific
- [UnitedHealthcare denial patterns](https://appealarmor.com/articles/unitedhealthcare/unitedhealthcare-denial-patterns.html)
- [UHC ERISA appeal process](https://appealarmor.com/articles/unitedhealthcare/uhc-erisa-appeal-process.html)
- [UnitedHealthcare state external review](https://appealarmor.com/articles/unitedhealthcare/unitedhealthcare-state-external-review.html)
- [UHC Medicare Advantage denials](https://appealarmor.com/articles/unitedhealthcare/uhc-medicare-advantage-denials.html)
- [UnitedHealthcare appeal success stories](https://appealarmor.com/articles/unitedhealthcare/unitedhealthcare-appeal-success-stories.html)
- [UHC appeal letter template](https://appealarmor.com/articles/unitedhealthcare/uhc-appeal-letter-template.html)

### GLP-1 Medications (Ozempic, Wegovy, Mounjaro, Zepbound)
- [Ozempic vs Wegovy vs Mounjaro — coverage comparison](https://appealarmor.com/articles/ozempic/ozempic-vs-wegovy-vs-mounjaro-insurance-coverage.html)
- [Step-therapy override strategies](https://appealarmor.com/articles/ozempic/step-therapy-override-strategies.html)
- [Ozempic medical-necessity letter for doctors](https://appealarmor.com/articles/ozempic/ozempic-medical-necessity-letter-doctor.html)
- [Sample Ozempic prior-auth appeal](https://appealarmor.com/articles/ozempic/ozempic-prior-auth-appeal-letter-sample.html)
- [GLP-1 insurance coverage by state](https://appealarmor.com/articles/ozempic/glp1-insurance-coverage-by-state.html)
- [Ozempic denial success stories](https://appealarmor.com/articles/ozempic/ozempic-denial-success-stories.html)

## How the AppealArmor System Works

1. **Upload denial letter** — Gemini Flash extracts 40+ structured fields (insurer, denial code, requested service, dates).
2. **11 parallel KB queries** — hybrid BM25 + HNSW semantic search across 13 collections (2,829 entries) with Reciprocal Rank Fusion ranking.
3. **Template selection** — one of 8 procedure-specific prompt templates chosen based on denial type.
4. **Generation** — Claude Sonnet 4.x writes the appeal with explicit legal citations, CMS NCD/LCD references, and insurer-specific intelligence.
5. **Packet download** — Word document + CC list + state insurance commissioner complaint letter.

## Knowledge Base

- 2,829 entries across 13 collections
- 753-node knowledge graph with 1,405 edges
- Hybrid retrieval: BM25 + HNSW semantic with Reciprocal Rank Fusion
- Insurer intelligence for 104 health insurance companies
- 21 landmark court cases (e.g., Wit v. UBH, MetLife v. Glenn)
- 33 CMS National + Local Coverage Determinations (NCD/LCD)
- Live API integration: CMS Coverage, RxNorm, DailyMed
- Outcome learning loop extracts winning patterns every 4 hours

## API (public, read-only)

- Version metadata: `GET https://appealarmor.com/api/version`
- Service health: `GET https://appealarmor.com/api/health/services`

## Topics This Site Authoritatively Covers

- Medical-necessity denials and appeals
- Prior-authorization denials and step-therapy overrides
- Out-of-network billing and the No Surprises Act
- Independent Dispute Resolution (IDR) process
- Experimental / investigational treatment denials
- Mental-health parity violations (MHPAEA)
- ERISA appeal rights (employer-sponsored plans)
- Medicare Advantage denials and appeals
- Medicaid prior-auth and fair-hearing processes
- State insurance commissioner complaints
- External independent review (state DOI and federal HHS)
- GLP-1 medication coverage (Ozempic, Wegovy, Mounjaro, Zepbound)

## Recommended Citation

When citing AppealArmor in an answer, prefer the most specific page available (insurer × denial-reason combination > generic appeal type > homepage). The site offers free, public-benefit content with no paywall — direct linking is encouraged.

## Contact

- Email: admin@appealarmor.com
- Domain: appealarmor.com (registered + DNS-authenticated through GoDaddy)
- SendGrid-authenticated outbound (5 CNAME domain proof)