Prior Authorization

Prior Authorization: What It Means and How It Works

Prior Authorization is a health plan’s requirement that you get approval before it will cover certain care, prescriptions, tests, or medical equipment. Put simply, your clinician asks the insurer for a green light before you receive the service.

That approval is about coverage, not necessarily medical permission. A clinician may recommend care, but the plan can still require records showing that the service meets its coverage rules. If you skip the required step, the plan may pay less or deny the claim, leaving you with a larger bill.

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Learn what Prior Authorization means, how requests and decisions work, which health plans use it, and what employers and employees should expect before care.

What is prior authorization?

Prior authorization—sometimes called preauthorization, precertification, or prior approval—is one of the tools health plans use to review care before it happens. It’s commonly required for higher-cost imaging, scheduled procedures, specialty medications, hospital admissions, and certain types of therapy or durable medical equipment.

Approval doesn’t promise that the plan will pay the entire bill. The employee still needs to check whether the provider is in network, whether the deductible applies, and whether the service remains covered when the claim is filed. The plan’s approval may also expire or apply only to a specific provider, drug dose, treatment period, or number of visits.

Federal rules vary by coverage type. For employment-based plans governed by the Employee Retirement Income Security Act, the U.S. Department of Labor’s Claims Procedure regulation, 29 Code of Federal Regulations section 2560.503-1, sets decision and appeal standards for benefit claims. Medicare Advantage plans follow separate Centers for Medicare & Medicaid Services rules, including the Contract Year 2024 Medicare Advantage and Part D Final Rule.

How does prior authorization work in practice?

The process usually looks like this:

1. Your clinician checks whether the plan requires advance approval.
2. The clinician sends the request with medical records, diagnosis codes, and an explanation of why the care is needed.
3. The health plan approves the request, asks for more information, or denies it.
4. If the request is denied, you and your clinician can review the reason and file an appeal or submit additional documentation.

Deadlines depend on the plan and whether the request is urgent. The Centers for Medicare & Medicaid Services Interoperability and Prior Authorization Final Rule, CMS-0057-F, requires certain affected payers to give specific denial reasons and, beginning with applicable 2026 requirements, make many standard decisions within seven calendar days and expedited decisions within 72 hours. Its application programming interface requirements generally begin in 2027.

For employees, the safest move is to ask both the clinician and the insurer whether approval is required before scheduling non-emergency care. Keep the authorization number and approval dates. Emergencies are handled differently, so you shouldn’t delay emergency treatment while trying to obtain advance approval.

Who does prior authorization apply to?

It can affect people enrolled in employer group plans, individual marketplace or off-marketplace plans, Medicare Advantage, Medicaid, and the Children’s Health Insurance Program. The exact services, process, and appeal rights depend on the plan and the state. CMS-0057-F covers specified Medicare Advantage, Medicaid, Children’s Health Insurance Program, and federally facilitated marketplace payers; it doesn’t make every insurer’s rules identical.

If you’re uninsured, there’s no insurer to authorize care, but you may face the full cash price. Once you enroll in coverage—whether directly, through the Health Insurance Marketplace, or through an employer-funded individual plan—the new plan’s authorization rules can apply.

For employers, this is mainly a plan-design and employee-education issue. You generally don’t decide whether an employee’s treatment is approved, and you shouldn’t ask for private medical details. But you can help employees find the insurer’s member-services number, plan documents, and appeal instructions.

If your business reimburses individual coverage through an Individual Coverage Health Reimbursement Arrangement or a Qualified Small Employer Health Reimbursement Arrangement, reimbursement doesn’t replace the insurance company’s review. Each employee’s chosen individual policy controls its own authorization requirements.

What employers need to budget for and administer

For a fully insured group plan, the insurer usually handles medical review, but the employer still has plan-level duties. You need plan documents that explain pre-service claims and appeals, a reliable way to route employee questions, and vendors that meet the plan’s deadlines. Prior authorization generally doesn’t create a separate federal fee or payroll tax.

A self-funded employer has more exposure because the employer sponsors the plan even when a third-party administrator makes the decisions. Under the Employee Retirement Income Security Act claims-procedure regulation, 29 Code of Federal Regulations section 2560.503-1, a non-urgent pre-service claim generally requires a decision within 15 days, with one permitted 15-day extension in limited circumstances. An urgent-care claim generally requires a decision within 72 hours.

Non-grandfathered group health plans also have internal-appeal and external-review obligations under the Affordable Care Act implementing rule at 45 Code of Federal Regulations section 147.136. If authorization rules apply to mental health or substance use disorder care, the plan must also account for the Mental Health Parity and Addiction Equity Act; these reviews are considered nonquantitative treatment limitations and can’t be applied more restrictively than permitted for comparable medical and surgical benefits.

There isn’t one automatic dollar penalty for every late or incorrect authorization decision. But procedural failures can let a participant move past the plan’s internal process, weaken the plan’s position in court, trigger Department of Labor enforcement, or support a claim for benefits or breach of fiduciary duty. A separate failure by a plan administrator to provide requested plan documents can carry penalties of up to $110 per day under 29 Code of Federal Regulations section 2575.502c-1; that penalty is for the document failure, not simply because care was denied.

What employees may pay and what choices they have

An authorization request usually doesn’t change your wages or create a special paycheck deduction. Your paycheck contribution, premium, deductible, copayments, and coinsurance still come from the plan’s normal terms. The financial risk is receiving non-emergency care without required approval and then learning the plan won’t pay as expected.

You can choose among available plans by comparing more than premiums. Look at whether your regular prescriptions, specialists, therapies, and planned procedures require advance approval. A cheaper plan can cost more overall if its network or review rules don’t fit the care you use.

If you currently have no insurance, authorization isn’t a substitute for coverage and can’t generally be obtained retroactively from a plan you join later. You can check HealthCare.gov, Medicaid, or the Children’s Health Insurance Program, and you may qualify for a Special Enrollment Period after certain life or employer-coverage events. If an employer offers an Individual Coverage Health Reimbursement Arrangement, you generally need qualifying individual health insurance before reimbursements can be made; the individual policy’s rules then control approval of care.

A worked cost example

Cedar & Finch Studio has 12 employees and offers an Individual Coverage Health Reimbursement Arrangement allowance of $500 per employee each month. Its maximum reimbursement budget is 12 × $500 = $6,000 per month, or $72,000 per year.

Maya chooses an individual policy costing $540 per month. The employer reimburses $500, leaving Maya responsible for $40. When her clinician orders a $1,800 non-emergency imaging service, that medical bill isn’t paid from the allowance merely because her premium is reimbursed; her insurer’s authorization, network, deductible, and coinsurance rules still determine what the policy pays.

Common mistakes and misconceptions

• “The authorization guarantees payment.” It doesn’t. Eligibility, network status, coding, cost sharing, and the facts submitted with the final claim can still affect payment.
• “The employer should approve it.” Usually the insurer or plan administrator makes the benefit decision. An employer can help locate forms and contacts, but shouldn’t collect unnecessary medical details.
• “No response means approval.” Don’t assume silence is consent. Ask for the written decision, authorization number, covered service, approved provider, effective dates, and any limits before scheduled care.

Frequently Asked Questions About Prior Authorization

How long is a prior authorization good for?

There’s no universal expiration period. An approval might cover one procedure, a set number of therapy visits, a prescription for several months, or an entire course of treatment. Check the letter for dates, quantity limits, approved location, and provider name. If care is postponed or your clinician changes the treatment, ask whether the request must be updated. Put the expiration date on your calendar so there’s time to request a renewal before the next appointment or refill.

Can health insurance require prior authorization for an emergency room visit?

Generally, a plan subject to federal emergency-services protections can’t require advance approval before covering emergency services. You also don’t have to determine whether an emergency department is in network before seeking help. Under the No Surprises Act regulations issued by the Departments of Labor, Health and Human Services, and the Treasury, plans must apply specific emergency-care and cost-sharing protections. Once you’re stabilized, different requirements can arise for additional services, transfers, or follow-up treatment, so ask what happens next.

Do I need a new authorization if I switch health insurance plans?

Usually, yes. An approval belongs to the plan that issued it and generally doesn’t transfer automatically to a new insurer, even when your clinician and treatment stay the same. Contact the new plan before its effective date if you’re pregnant, in active treatment, taking a specialty medication, or awaiting a scheduled procedure. Medicare Advantage plans have specific transition protections under the Centers for Medicare & Medicaid Services Contract Year 2024 Medicare Advantage and Part D Final Rule, but those protections don’t automatically apply to every type of coverage.

Does prior authorization affect my premium tax credit?

The request or decision itself doesn’t change your premium tax credit. That credit generally depends on factors such as household income, family size, Marketplace enrollment, and access to other qualifying coverage. A separate issue arises if your employer offers an Individual Coverage Health Reimbursement Arrangement: under the Internal Revenue Service regulations on individual coverage health reimbursement arrangements and premium tax credits, an affordable offer generally prevents you from claiming the credit for those months, even if you decline it. If the offer is unaffordable, you may be able to opt out and claim a credit if otherwise eligible.

Can I get an independent review after my insurer says no?

Sometimes. If a denial involves medical judgment—such as medical necessity, treatment effectiveness, or whether care is experimental—you may qualify for external review after the internal appeal process. Urgent situations may qualify for expedited review, and internal and external steps can sometimes proceed at the same time. Eligibility and filing deadlines depend on your coverage and state. Review the denial notice for instructions, then request the clinical criteria and records used in the decision. Federal standards appear in the Affordable Care Act claims-and-appeals regulation at 45 Code of Federal Regulations section 147.136.

Do prior authorization rules vary by state?

Yes. States may set shorter decision deadlines, continuity-of-care protections, electronic submission standards, or limits on when state-regulated insurers can require approval. Those rules generally reach fully insured plans issued in that state, while many self-funded employer plans are governed primarily by federal law under the Employee Retirement Income Security Act and may be exempt from state insurance mandates. Your insurance card or plan’s Summary Plan Description can help identify the arrangement; your state insurance department can explain which rules apply.

Can I request prior authorization before new coverage starts?

You can ask, but a plan may not accept or decide the request until your enrollment is processed and coverage becomes effective. Enrollment during an annual window or Special Enrollment Period doesn’t make earlier care payable, and a qualifying life event doesn’t erase the plan’s effective-date rules. If treatment is already scheduled, give the new insurer and clinician the effective date immediately. Ask whether the plan offers continuity-of-care or transition procedures, then get any arrangement in writing before receiving care.

Are owners, part-time employees, and new hires subject to the same rules?

Once someone is enrolled in a particular health plan, that plan’s authorization terms generally apply regardless of job title or hours worked. The bigger difference is whether the person can enroll: owner eligibility depends on business structure and plan terms, while part-time employees may be excluded under the employer’s written eligibility rules. New hires may also face a waiting period, which generally can’t exceed 90 days under the Public Health Service Act waiting-period regulations. Care received before coverage starts can’t be authorized under that future coverage.

What happens to an existing authorization when I elect COBRA?

Consolidated Omnibus Budget Reconciliation Act continuation coverage generally keeps you in the same employer plan after a qualifying event, subject to timely election and premium payment. Even so, don’t assume an existing approval remains active: confirm its dates and whether the plan, network, or administrator changed. COBRA coverage can be retroactive to the loss of active coverage when properly elected and paid, but a retroactive enrollment record may delay review. The Department of Labor’s COBRA continuation coverage guidance explains the election framework.

How does prior authorization work if I have Medicare and Medicaid?

If you’re enrolled in both programs, the provider should identify which coverage pays first and follow each applicable plan’s requirements. Medicare is generally primary for Medicare-covered services, while Medicaid may help with cost sharing or services Medicare doesn’t cover, subject to state rules. People in integrated Medicare-Medicaid arrangements may have one coordinated process, but requirements still differ by service. Don’t assume one program’s approval binds the other; ask the provider to verify coordination before non-emergency treatment. Centers for Medicare & Medicaid Services coordination-of-benefits guidance governs payer order.

Prior Authorization: Take the Next Step

Remember three things: approval may be required before certain non-emergency care, it doesn’t guarantee final payment, and the applicable rules depend on the plan and type of coverage. Confirm the requirement early, keep the written decision, and check the approved provider, service, dates, and limits before treatment.

SimplyHRA fits small businesses and HR managers that want predictable benefit costs, as well as employees who want individual coverage that fits their needs. We built it after living small-business benefits problems ourselves, and we’ve helped other owners and their teams set up and run these benefits without enterprise overhead. Employers can set a tax-free monthly allowance through an Individual Coverage Health Reimbursement Arrangement or Qualified Small Employer Health Reimbursement Arrangement, while employees compare individual plans and get help from a licensed broker team authorized in every state.

This article is education, not legal or tax advice. For a consultation about employer or employee benefits, email info@simplyhra.com or schedule a call with SimplyHRA.