This is the most common misunderstanding about PPOs. Skipping referrals is not the same as skipping approval. A referral is your primary care physician sending you to a specialist. Prior authorization is the insurer agreeing to pay before you receive a service. PPOs generally drop the first and keep the second.
Most Medicare Advantage plans, PPOs included, require prior authorization for higher cost services: hospital stays, skilled nursing facility care, advanced imaging such as MRI and CT, many outpatient procedures, and durable medical equipment. Routine office visits usually do not need it.
| Prior authorization in Medicare Advantage |
2024 figure |
| Requests submitted to Medicare Advantage insurers |
52.8 million |
| Denied in full or in part |
4.1 million, or 7.7 percent |
| Share of denials that were appealed |
11.5 percent |
| Share of appeals overturned in the patient’s favour |
More than 80 percent |
Two things follow from that table. Denials are uncommon but not rare, and almost nobody appeals them even though appealing works most of the time. If your PPO denies something your doctor says you need, the odds are strongly in your favour if you challenge it.
Before you enrol, ask the plan which services require prior authorization. Plans decide this individually, so two PPOs with identical premiums can be very different to live with.