Health Insurance
5 min read • Updated September 2026
How Much Does a PET Scan Cost With Insurance?
Quick Answer / Executive Summary
Without insurance, a PET scan typically costs $1,000-$6,000 or more — noticeably higher than an MRI or CT scan — because it requires a radioactive tracer that's produced and shipped shortly before the scan. With insurance, most plans place PET scans in the same advanced-imaging coinsurance tier as MRI and CT, but they almost always require prior authorization first, since PET is frequently used for cancer staging and treatment monitoring rather than routine diagnosis.
Key Takeaways at a Glance
- PET scans cost more than MRI or CT largely because of the radioactive tracer (commonly a glucose analog) that must be produced at a specialized facility and delivered shortly before the appointment, adding a real logistics cost that other imaging doesn't carry.
- Prior authorization is almost universal for PET scans, meaning your insurer must approve the specific medical necessity before the scan — skipping this step is one of the most common reasons an otherwise-covered PET scan gets denied.
- PET scans are frequently combined with a CT scan in the same session (a "PET/CT") to overlay metabolic activity onto detailed anatomical images, which is billed as a combined procedure rather than two separate ones.
- Because PET is most often used for cancer diagnosis, staging, and monitoring treatment response, it's disproportionately ordered for patients already managing a serious diagnosis — making the prior authorization and appeals process especially high-stakes if a claim is initially denied.
Why a PET Scan Costs More Than an MRI or CT Scan
A PET scan requires injecting a small amount of a radioactive tracer, most commonly a glucose analog called FDG, which highlights areas of high metabolic activity — a hallmark of many cancers and some other conditions. That tracer has to be produced at a specialized cyclotron facility and delivered to the imaging center within a tight window before it decays, a supply chain that MRI and CT scans simply don't require. This logistics cost, on top of the specialized equipment needed to detect the tracer, is the main reason PET scans carry a meaningfully higher price tag than other advanced imaging.
Prior Authorization Is Not Optional Here
Unlike a routine X-ray or even many MRI orders, a PET scan almost always requires prior authorization from your insurer before it's performed, given both the cost and the specificity of its typical use cases. Your ordering physician's office typically handles this submission, but it's worth confirming directly that authorization has actually been approved — not just submitted — before the appointment, since a scan performed without approved authorization can be denied entirely regardless of medical necessity, leaving the patient responsible for the full self-pay price.
PET/CT: One Combined Scan, One Combined Bill
Many PET scans are actually performed as a combined PET/CT, layering the PET scan's metabolic activity data onto the CT scan's detailed anatomical images in a single session. This is billed as one combined procedure code rather than two separate imaging charges, which is generally more cost-effective than having a CT scan and a separate PET scan on different days, but it also means the total price reflects both technologies bundled together rather than either one alone.
What You Should Do: Step-by-Step Action Plan
1
Confirm with your provider's office that prior authorization has been approved, not just submitted, before your scheduled appointment.
2
Ask whether your scan is being ordered as a standalone PET or a combined PET/CT, since this affects both the total cost and what's actually being measured.
3
If a PET scan is denied, ask specifically why and request the denial in writing, since appeals for imaging tied to a cancer diagnosis are often successful when the medical necessity is well-documented.
4
Ask your facility whether the tracer cost is included in their quoted price or billed as a separate pharmacy charge.
Critical Mistakes to Avoid
- Assuming prior authorization is automatic or unnecessary the way it might be for a routine X-ray.
- Not confirming whether the scan is a standalone PET or a combined PET/CT before comparing prices to other quotes.
- Accepting an initial denial without appealing, particularly when the scan is tied to an active cancer diagnosis or monitoring plan.
- Assuming the tracer cost is automatically bundled into every facility's quoted price without confirming directly.