Answer
What is prior authorization for cancer treatment?
Prior authorization is your insurance plan's approval that a service or medication is medically necessary before it's delivered. It's common for PET scans, infusions, radiation therapy, and specialty oncology drugs.
Last updated: 2026-07-10 · Reviewed by Cancer Answers OC Care Coordination Team
Your oncologist's office typically submits prior authorization requests directly to your insurer.
Most decisions arrive within 3-5 business days; urgent oncology requests can often be expedited to 24-72 hours.
If a request is denied, you have the right to appeal. California also allows independent medical review for many denials.
Our care coordinators track prior authorizations so there are no surprises before treatment.