What Is Prior Authorization
Prior authorization is approval you must get from your benefits program before receiving certain services, medications, or treatments. If you receive the service without approval first, your program may deny the claim and you could owe the full cost.
Government benefits programs like Medicaid, SNAP, TANF, and WIC use prior authorization to verify that services match your eligibility and program rules. For Medicaid specifically, prior authorization protects both you and the program by confirming that prescribed treatments are medically necessary and cost-effective.
How Prior Authorization Works in Government Benefits
- For Medicaid: Your doctor or provider submits a request to your state Medicaid program. The program has 1 to 5 business days to review it, depending on whether it's routine or urgent. They check if the service is covered under your state's Medicaid plan and if it's medically necessary for your condition.
- For SNAP: Prior authorization typically applies to vendor authorization. Retailers must be approved vendors to accept SNAP benefits. You cannot use SNAP at unauthorized stores.
- For TANF and WIC: Prior authorization may apply to specific services or goods. WIC has strict rules about which foods and formulas are approved. Your state WIC program maintains the approved list, and vendors must be certified.
- For prescription medications: Your Medicaid plan maintains a formulary (list of covered drugs). Some medications require prior authorization before the pharmacy can fill them. Your doctor must prove medical necessity if you need a drug that's not first-line treatment.
Why You Need to Know This
If your provider submits a prior authorization request and the program denies it, you could face thousands in medical debt. Knowing this process helps you ask your doctor upfront whether prior authorization is needed before scheduling a procedure or starting a medication. Many denials happen because the provider didn't submit proper documentation or the request was lost in the system.
State programs vary significantly. California Medicaid requires prior authorization for certain procedures; Texas does not require it for the same ones. When you move states or switch programs, check your new program's prior authorization requirements immediately.
What Typically Needs Prior Authorization
- Specialty medications and brand-name drugs when generic equivalents exist
- Advanced diagnostic imaging (MRIs, CT scans beyond routine care)
- Mental health and substance abuse treatment lasting more than a set number of sessions
- Non-emergency surgeries and procedures
- Durable medical equipment (wheelchairs, CPAP machines, hospital beds)
- Home health services
- Certain physical therapy or occupational therapy courses
Common Questions
- What happens if my doctor already gave me the service without prior authorization? Contact your state Medicaid or benefits office immediately. Some programs allow retroactive authorization if the service was medically necessary. Others will deny the claim. The sooner you report it, the better chance the program has to review it.
- How long does prior authorization take? Standard requests take 1 to 5 business days. Urgent requests (for ongoing treatment or time-sensitive conditions) must be approved or denied within 24 to 72 hours, depending on your state. Ask your provider to mark it urgent if you need fast approval.
- Can I appeal if my prior authorization is denied? Yes. Every state program must allow you to appeal. You have 10 to 30 days (varies by state) to file an appeal and request a fair hearing. Your state benefits office can explain the appeal process in writing.
Related Concepts
- Formulary - the list of approved medications your program covers
- Essential Health Benefits - the core services Medicaid must cover
- Insurance - how government benefits work as a form of health coverage