Answer
Do I need a referral to see an oncologist?
If you have an HMO plan, yes — your primary care physician must issue a referral. PPO and EPO members can typically self-refer to an in-network oncologist.
Last updated: 2026-07-10 · Reviewed by Cancer Answers OC Care Coordination Team
HMO plans (including Medicare Advantage HMOs) require a referral from your assigned primary care physician.
PPO and EPO plans typically let you schedule directly with any in-network specialist, including oncologists.
Original Medicare beneficiaries do not need referrals to see a Medicare-participating specialist.
If your referral expires or is delayed, our care coordinators can help follow up with your PCP's office.