Step-by-Step CONDUSEF Complaint Guide for Health Insurance Denials in Mexico

When a Mexican health insurer denies your claim unfairly, the CONDUSEF (Comisión Nacional para la Protección y Defensa de los Usuarios de Servicios Financieros) is your primary consumer protection ally. This step-by-step guide walks through the entire CONDUSEF complaint process — from filing through mediation, CNSF escalation, and beyond.

What Is CONDUSEF?

CONDUSEF is Mexico's federal financial services consumer protection agency. All private health insurers operating in Mexico are financial services entities regulated by the CNSF (Comisión Nacional de Seguros y Fianzas) and subject to CONDUSEF's consumer protection jurisdiction.

CONDUSEF's services are completely free. Filing a complaint does not require a lawyer. CONDUSEF handles thousands of insurance disputes annually and has established mediation infrastructure with all major Mexican insurers.

Before Filing: Document Everything

Before approaching CONDUSEF, gather:

• Your health insurance policy (póliza) — the complete contract
• The specific clause your insurer cited to deny your claim
• All correspondence with your insurer (emails, letters, call recordings if available)
• Medical records, physician recommendations, and diagnostic results supporting the claim
• Your insurer's formal denial letter (carta de rechazo)
• Any previous complaint folios from your insurer's own complaint process

The more documentation you have, the stronger your CONDUSEF complaint.

Step 1: Internal Complaint with the Insurer (UNE)

Before CONDUSEF will formally process your complaint, you must typically attempt resolution through the insurer's UNE (Unidad Especializada de Atención a Usuarios) — the internal customer protection unit that all CNSF-regulated insurers are required to maintain.

• File your complaint with the insurer's UNE in writing
• Request a folio or number for your complaint
• The insurer's UNE must respond within 5 business days for standard matters

If the UNE does not resolve your dispute or you do not receive a response within 5 business days, you are entitled to escalate to CONDUSEF.

Step 2: File with CONDUSEF — The RECA Portal

The RECA (Registro de Comisiones y Acuerdos) portal at condusef.gob.mx is the primary online platform for filing complaints. Here's how:

1. Create an account at condusef.gob.mx (requires a valid email and CURP or RFC)
2. Navigate to "Presentar una Queja" (File a Complaint)
3. Select Seguros (Insurance) as the sector and identify your specific insurer
4. Describe the denial in detail — include:
   • Date of the denied service or procedure
   • Amount involved
   • Specific policy clause cited by the insurer
   • Medical justification from your physician
5. Upload all supporting documents
6. Submit — you will receive a complaint folio number immediately

Alternative filing methods:

• Phone: 55 53 400 999 or toll-free 800 999 8080 (Monday–Friday)
• In person: CONDUSEF's Módulo de Atención offices in Mexico City and major state capitals
• Email: via the CONDUSEF portal messaging system

Step 3: CONDUSEF's Mediation Process

After receiving your complaint, CONDUSEF follows a defined process:

Notification (Day 1–3): CONDUSEF formally notifies your insurer of the complaint and requests its response and justification.

Insurer Response (Day 4–20): The insurer has up to 20 business days to respond to CONDUSEF with its position.

CONDUSEF Analysis: CONDUSEF analysts review both the consumer complaint and insurer response, evaluating compliance with:

• The specific policy language (condiciones generales)
• Applicable insurance law (Ley de Instituciones de Seguros y de Fianzas — LISF)
• Consumer protection standards

Conciliation Session: CONDUSEF typically invites both parties to a conciliation hearing (session de conciliación) — held in person or via video conference. This is where most cases are resolved. The conciliator works to find a settlement acceptable to both parties.

Resolution: If conciliation is successful, a written agreement (convenio) is executed. If unsuccessful, CONDUSEF issues a dictamen (ruling) with its assessment and recommendation.

Step 4: CNSF Escalation

If CONDUSEF mediation is unsuccessful and you believe your insurer has violated applicable insurance law, escalate to the CNSF (Comisión Nacional de Seguros y Fianzas) at gob.mx/cnsf.

CNSF has regulatory and enforcement powers over insurers, including:

• Investigating whether an insurer's policy language complies with approved CNSF filings
• Initiating sanctions proceedings for systematic consumer rights violations
• Ordering corrective actions against non-compliant insurers

CNSF complaints are particularly effective when:

• Your insurer is applying policy language differently from the version approved by CNSF
• The denial appears to reflect a systematic practice affecting many consumers
• The insurer failed to comply with CONDUSEF's conciliation recommendation

Step 5: PROFECO for Consumer Code Violations

PROFECO (Procuraduría Federal del Consumidor) has jurisdiction over consumer protection violations — including insurance contract terms that are abusive, misleading, or violate the Ley Federal de Protección al Consumidor (LFPC). File at profeco.gob.mx or via 800 468 8722.

PROFECO is particularly relevant when:

• Your insurer used misleading advertising or sales practices
• Contract terms are abusive or unconscionable under the LFPC
• The insurer failed to provide required disclosures

Practical Tips for a Strong CONDUSEF Complaint

• Be specific: Reference the exact policy clause and the specific procedure or service denied
• Include medical necessity evidence: A physician letter explaining why the treatment is medically necessary is powerful
• Cite comparable coverage: If your policy covers similar procedures, show how your case is analogous
• Keep records: Document every contact with CONDUSEF, including representative names and call reference numbers
• Be timely: File your complaint within applicable statutory periods — generally within 2 years of the denial date under Mexican insurance law

What CONDUSEF Cannot Do

CONDUSEF cannot force an insurer to pay a claim — its role is mediation and consumer protection. If your insurer refuses CONDUSEF's conciliation and you have a strong legal claim, civil court action is your next option. The CONDUSEF process creates a documented record that strengthens subsequent litigation.

Fight Back With ClaimBack

The CONDUSEF system is accessible and effective — but the documentation phase is critical. ClaimBack helps you organize your medical records, policy analysis, and appeal letter for the strongest possible complaint.

Start your free appeal at ClaimBack

Related Reading

• How to Write an Insurance Appeal Letter
• Internal vs. External Insurance Appeal: What's the Difference?
• Common Reasons Insurance Claims Are Denied