Prior Authorization Denied in the Netherlands

Prior Authorization Denied: How to Appeal" class="auto-link">Prior authorization — called machtiging in Dutch — is a requirement imposed by Dutch health insurers before they will agree to cover certain treatments, medications, or procedures. When a machtiging is denied, you can be left without access to treatments your doctor believes are essential. Understanding your rights in this situation is critical.

What Is a Machtiging?

A machtiging is advance written approval from your health insurer confirming they will reimburse a specific treatment or care pathway. Not all treatments require machtiging — most routine care covered by the basisverzekering does not. But for expensive, specialized, or non-routine treatments, your insurer may require advance authorization before agreeing to pay.

Common treatment categories requiring machtiging include:

• Specialized mental healthcare (GGZ) beyond certain thresholds
• Certain surgical procedures and elective operations
• High-cost medications not automatically included in the standard formulary (GVS)
• Medical aids and devices (orthotics, prosthetics, hearing aids)
• Rehabilitation programs (including certain inpatient rehabilitation)
• Long-term physiotherapy for non-chronic conditions
• Cross-border care in other EU/EEA countries under the EU Patients' Rights Directive
• Highly specialized treatments at academic medical centers

Why Machtiging Requests Get Denied

Treatment not covered under the basic package. If the Zorgverzekeringswet does not include the requested treatment in the basisverzekering, the insurer will deny the machtiging. Always verify coverage at zorginzicht.nl before requesting authorization.

Insufficient clinical documentation. A machtiging request must include adequate clinical justification — diagnosis codes, treatment plan, specialist letter, and evidence of medical necessity. Incomplete requests are frequently denied for administrative reasons, not because the treatment itself is non-coverable.

Treatment deemed not medically necessary. The insurer's medical advisor (medisch adviseur) reviews the clinical justification. If the advisor disagrees with the treating physician's assessment, the machtiging is denied on medical necessity grounds.

Alternative treatment required first. Insurers often require patients to try a less expensive or lower-intensity treatment before authorizing a more costly option. This is called step therapy. If step therapy has not been completed, the machtiging for the next-level treatment may be denied.

Out-of-network provider. For natura policy holders, machtiging for care at a non-contracted provider may be denied on network grounds even if the treatment itself is covered.

Your Right to Challenge a Machtiging Denial

Under Dutch law and the Zvw, you have the right to appeal a machtiging denial through the same channels as any other claim denial.

Step 1: Request the specific medical advice (medisch advies). You are entitled to see the medical advice that formed the basis of the denial. Request this in writing from your insurer. Review it with your treating physician to identify any factual or clinical errors.

Step 2: Get a detailed clinical letter from your specialist. Your treating physician should write a comprehensive letter explaining:

• Your diagnosis and clinical history
• Why the requested treatment is medically necessary
• Why alternative treatments are not appropriate or have been tried and failed
• Reference to relevant clinical guidelines (richtlijnen) from Dutch medical associations

Step 3: File a formal written appeal (bezwaar). Submit your appeal to the insurer in writing. Include:

• The machtiging denial reference number
• Your physician's clinical letter
• Any supporting medical records
• Reference to Zvw coverage provisions or Zorginstituut Nederland position papers if applicable

Insurers must respond to formal bezwaar within six weeks.

Step 4: Request a second medical opinion. Under Dutch patient rights law, you have the right to seek a second medical opinion. If another specialist agrees that the treatment is necessary, use their letter in your appeal. Some insurers will reconsider a machtiging denial when faced with two specialist opinions.

Step 5: Escalate to Kifid. If the internal appeal fails, Kifid (kifid.nl) can review machtiging denials. Kifid has ruled against Dutch insurers in cases where machtiging was improperly denied for covered treatments.

Urgent Machtiging Situations

If you need the treatment urgently — for example, for a serious or deteriorating condition — contact your insurer's medical department directly and request an expedited review. Insurers are expected to prioritize urgent machtiging requests. If the insurer is causing harmful delays, report to the NZa (nza.nl), which oversees timely access to care under the Zvw.

NZa Guidance on Machtiging

The NZa has issued guidance on how and when insurers may impose machtiging requirements. Insurers cannot use machtiging as a tool to improperly restrict access to care that is legally covered under the basisverzekering. If you believe your insurer is using machtiging processes to systematically delay or deny covered care, the NZa wants to know — file a report at nza.nl.

Cross-Border Care and Machtiging

If you are seeking treatment in another EU country under the EU Patients' Rights Directive (Patient Rights in Cross-Border Healthcare), your Dutch insurer may require prior authorization for certain types of care (particularly overnight hospital stays and highly specialized treatments). The NZa oversees Dutch compliance with EU cross-border care rights.

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Related Reading:

• How to Write an Insurance Appeal Letter
• What Is Medical Necessity?
• Internal vs External Insurance Appeal