Appeal Letter Builder for Medical Billing Denials
The Appeal Letter Builder generates compliant medical billing appeal letters from denial code, payer type, specialty, and clinical details. All citation logic runs locally in the browser — no patient data, clinical notes, or claim details are transmitted to any server or AI model. The output is a formatted letter ready to submit to the payer.
The builder works from the CARC (Claim Adjustment Reason Code) on the remittance advice. Select the denial code — CO-4, CO-11, CO-16, CO-22, CO-29, CO-45, CO-96, CO-97, PR-1, and 60+ additional codes — and the builder identifies the correct regulatory framework and argument category. Medical necessity denials cite applicable LCDs, NCDs, and clinical society guidelines. Timely filing denials cite 42 CFR and applicable state statutes. Bundling denials cite CMS NCCI edits and the correct unbundling authority. Authorization denials cite ACA §2719, ERISA §503, and 29 CFR §2560.503-1.
Jurisdictional routing: the builder automatically selects the correct legal framework based on payer type. Medicare claims cite 42 CFR §405.940 (redetermination). Medicare Advantage claims cite 42 CFR §422.566 and §422.568. Self-funded ERISA plans cite ERISA §503 and 29 CFR §2560.503-1, with federal preemption of state insurance law per ERISA §514(a). Fully-insured commercial plans cite the applicable state insurance code and prompt pay statute. Mixed-commercial plans (UHC, Aetna, BCBS, Cigna) present both pathways with a clarification prompt.
State-specific appeal response deadlines — acknowledgment windows and resolution windows from verified state statutes — are cited in the regulatory basis section for applicable state-governed claims. Specialty-specific documentation checklists (behavioral health, orthopedics, cardiology, oncology, physical therapy, emergency medicine) are included in the supporting documentation section.