A second opinion isn’t disloyalty. It’s due diligence.
Get a second opinion when the diagnosis is serious or rare, when surgery or a risky treatment is on the table, when you’re not improving, or when your gut says something’s off. It’s routine, usually covered by insurance, and good doctors expect it. In a landmark Mayo Clinic study, only 12% of patients had their original diagnosis fully confirmed — the other 88% left with a new or refined one.
You’re sitting in the exam room and the words don’t feel right. Maybe the diagnosis is frightening, maybe the plan is surgery, maybe the doctor seemed rushed. A quiet voice asks: should I check this with someone else? Almost always, the answer is yes — and it’s one of the most normal things in medicine.
What the research actually shows
The most cited study on this comes from Mayo Clinic, which reviewed 286 patients referred to its general internal medicine division and compared each person’s referring diagnosis to the final one.
66% — refined or better defined
12% — original confirmed
In other words, roughly 1 in 5 patients was significantly misdiagnosed before the second look. And it’s not only about safety: Cleveland Clinic has reported that second opinions changed the diagnosis or treatment plan in about two-thirds of cases and saved an average of roughly $8,700 per case by avoiding unnecessary or wrong treatment.
The five situations where it’s clearly worth it
How to ask — without offending your doctor
This is the part that stops people. Here’s the reframe: a good physician wants you confident in your care, and medical ethics actively support second opinions. You don’t need permission, and you don’t need to sneak around. Try saying it plainly and warmly:
Notice what that does: it frames the second opinion as you being thorough, not you doubting them — and it asks for their help, which keeps them on your side. If a doctor reacts badly to that request, take it as useful information about whether they’re the right fit.
Three myths that keep people from a second look
Reality: Second opinions are routine and expected, especially before surgery or for serious conditions. Ethical doctors support them.
Reality: Many plans cover second opinions, and some require one before major surgery. Staying in-network keeps your cost down — confirm with your plan first.
Reality: For most conditions, a week or two won’t change your outcome — and getting the diagnosis right matters more. Ask your doctor about urgency if you’re unsure.
When a second opinion may not be worth the effort
How to actually get a second opinion
Once you’ve decided, the logistics are straightforward:
Watch: how to think about a second opinion
A short explainer on how doctors actually feel about second-opinion requests — and why the Mayo Clinic data says they help.
Frequently asked questions
No. Second opinions are routine and expected, especially before surgery or for a serious diagnosis, and medical ethics support them. A good doctor wants you confident in your care and will usually help by sending your records.
Often yes. Many plans cover second opinions, and some require one before major surgery. Staying in-network keeps your cost down. Confirm coverage and whether you need prior authorization with your plan before you go.
Get one when the diagnosis is serious or rare, when surgery or an irreversible treatment is recommended, when you are not improving, or when your doctor seemed unsure or dismissed your questions.
It depends on your plan. HMO plans often require a referral from your primary doctor, while PPO plans usually let you self-refer to a specialist. Check your plan type before booking.
For most conditions a short delay of a week or two will not change your outcome, and getting the diagnosis right matters more. If you are unsure about urgency, ask your doctor how time-sensitive your treatment is.
You have a federal HIPAA right to your records and can have them sent directly to the second doctor. Request them in writing, choose electronic delivery, and providers generally must respond within 30 days.
- In the Mayo study, 88% of second-opinion patients got a new or refined diagnosis — only 12% were confirmed unchanged.
- Always worth it: serious/rare diagnoses, recommended surgery, no improvement, or a doctor who seems unsure.
- Ask by framing it as being thorough, and request your records be sent so you don’t repeat tests.
- Insurance often covers it — and may require it before surgery. Confirm in-network and prior auth first.
- Skip it for clearly minor, low-risk issues; spend the effort on the big, irreversible decisions.
Trusting your care team is good. Verifying the big decisions is better. If a second opinion is on your mind, start by finding the right specialist in our getmydr.com directory, then send your records ahead with our transfer guide. And if a bill ever comes back wrong, our appeal guide shows you how to push back.
• Van Such M, Lohr R, Beckman T, Naessens JM. “Extent of diagnostic agreement among medical referrals.” Journal of Evaluation in Clinical Practice (2017) — the 286-patient Mayo Clinic study.
• Mayo Clinic News Network — “Mayo Clinic researchers demonstrate value of second opinions.”
• Cleveland Clinic — reported second-opinion diagnosis/treatment changes and average cost savings (~$8,700/case).
General information, not medical, legal, or financial advice. For urgent or serious conditions, follow your physician’s guidance on timing.
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