Quick Answer: Prior authorization (PA) requires your doctor to get insurer approval before delivering a service, specialty drug, or procedure. Without approval, the claim may be denied even if medically necessary. Common PA triggers include MRI scans, brand-name medications, surgeries, and specialty referrals. If a claim is denied after care, use the [medical bill analyzer](/medical-bill-analyzer) to review your rights and next steps.
Standard vs Urgent Prior Authorization
The CMS Interoperability and Prior Authorization Final Rule (CMS-0057-F) set new deadlines effective January 1, 2026. These apply to Medicare eligibility-qualified plans (Medicare Advantage), Medicaid managed care, CHIP, and ACA Marketplace qualified health plans. Standard requests cover scheduled procedures; urgent requests apply when a delay would seriously harm the patient.
2026 PA decision deadlines by request type| Request Type | 2026 Deadline | Applies To |
|---|
| Standard | 7 calendar days | Medicare Advantage, Medicaid managed care, CHIP, QHP |
| Urgent / Expedited | 72 hours | Same plans when delay risks patient harm |
Source: CMS Interoperability and Prior Authorization Final Rule (CMS-0057-F), effective Jan 1, 2026.
Source: https://www.cms.gov/initiatives/burden-reduction/overview/interoperability/policies-regulations/cms-interoperability-prior-authorization-final-rule-cms-0057-f
Frequently Asked Questions
What services most commonly require prior authorization in 2026?
Common PA triggers include MRI and CT scans, brand-name specialty drugs, elective surgeries, inpatient admissions, durable medical equipment, and behavioral health services. Plans vary, so check your Summary of Benefits or call member services before scheduling. ACA Marketplace PA requirements are listed in the plan's Summary of Benefits at [aca-income-limits](/aca-income-limits) enrollment time.
What happens if I get care without prior authorization?
Your insurer may deny the claim, leaving you responsible for the full cost. In emergencies, insurers cannot require PA before stabilizing treatment. For non-emergency denied claims, you have the right to appeal. Review any denial letter carefully and use the [medical bill analyzer](/medical-bill-analyzer) to check whether the denial was properly processed.
How long does prior authorization take in 2026?
Under CMS rules effective January 1, 2026, standard PA requests must be decided within 7 calendar days and urgent requests within 72 hours for Medicare Advantage, Medicaid managed care, CHIP, and ACA qualified health plans. If your insurer misses these deadlines, document the submission date and escalate to your state insurance commissioner.
Can prior authorization be denied, and what are my options?
Yes, PA can be denied if the insurer decides the service is not medically necessary or not covered. You can request an internal appeal, then an external independent review. For Medicare Advantage plans, check [Medicare eligibility](/medicare-eligibility) rules on coverage disputes. Most states require a written denial reason within the decision deadline.
