Patient Rights GuideยทUpdated August 2026

Your Medicare Right to a Second Opinion: When to Use It and How to Get One Free

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By Dr. Sandra Mills, RN

Frequently Asked Questions

Does Medicare cover second opinions?

Yes โ€” Medicare Part B covers second surgical opinions at no additional cost beyond standard Part B cost-sharing (20% coinsurance after deductible). If the second opinion conflicts with the first, Medicare also covers a third opinion. With Medigap Plan G, second opinions are covered at $0. You do not need a referral from your primary care doctor to seek a second opinion.

When should seniors get a second opinion?

A second opinion is most valuable for: any major elective surgery (joint replacement, cardiac bypass, cancer surgery), a cancer diagnosis (especially before starting chemotherapy or radiation), a diagnosis that doesn't feel right or for which the treatment recommendation seems aggressive, any procedure with significant risk or long recovery, and any situation where multiple treatment options exist with different risk-benefit profiles.

Can I get a second opinion without my doctor knowing?

Yes โ€” you are entitled to seek a second opinion without informing your primary doctor. However, the second opinion doctor will need your medical records, imaging, and test results. You can request copies of all your medical records at any time under HIPAA โ€” providers must provide them within 30 days. Most doctors are not offended by second opinions; they understand it is standard practice for major decisions.

What is the difference between a second opinion and changing doctors?

A second opinion is a consultation specifically to evaluate a diagnosis or treatment recommendation โ€” you return to your original doctor afterward, now with additional information. Changing doctors means transferring your ongoing care to a new provider. You can get a second opinion without any intention of changing doctors, and you can decide to change doctors after hearing the second opinion if you prefer the new doctor's approach.

Where is the best place to get a cancer second opinion?

For cancer diagnoses, the strongest second opinions come from NCI-designated cancer centers โ€” these are comprehensive cancer centers recognized by the National Cancer Institute for exceptional research and clinical care. Major academic medical centers and teaching hospitals also provide strong second opinions. For rare cancers, seek an institution that sees high volumes of your specific cancer type. Many cancer centers offer second opinion consultations.

Medicare covers second surgical opinions โ€” and studies show they change the recommended treatment in 20โ€“30% of cases. For major decisions that affect your health, function, and quality of life, a second opinion is not distrust of your doctor. It is appropriate due diligence. Here is how to use this benefit effectively.

When Second Opinions Matter Most

Cancer Diagnosis

A cancer diagnosis deserves a second opinion before any treatment begins. Pathology results (the tissue analysis that confirms cancer type and grade) can be misread or require subspecialty expertise. Treatment protocols vary between institutions. For rare or complex cancers, seeking a second opinion at an NCI-designated cancer center can be the most important decision you make. Most cancer treatments can wait 1โ€“3 weeks for a second opinion without affecting outcomes โ€” and treatment started based on an incorrect or incomplete diagnosis can cause irreversible harm.

Major Elective Surgery

Knee replacement, hip replacement, spinal surgery, cardiac bypass, and similar major procedures are permanent and carry meaningful recovery burden. A second orthopedic or cardiac surgeon may recommend a different procedure, a less invasive approach, or continued conservative management โ€” particularly relevant when the first surgeon recommends surgery that you haven't yet tried extensive physical therapy or medication management to avoid.

Diagnoses That Don't Feel Right

If a diagnosis doesn't match your symptoms, if the recommended treatment feels disproportionate, or if you are uncertain about a diagnosis you received quickly without extensive testing โ€” these are appropriate times to seek a second opinion. Trust your instincts. Diagnostic errors affect millions of Americans annually and are more likely with complex presentations.

How to Get a Second Opinion Through Medicare

  1. Request your medical records. Ask your doctor's office for copies of all relevant records โ€” test results, imaging reports, pathology reports, operative notes. Under HIPAA, you are entitled to these within 30 days. Many offices can release them sooner electronically.
  2. Find a second opinion provider. Choose a physician with subspecialty expertise in your condition โ€” ideally at a different institution than your original doctor. Academic medical centers, NCI cancer centers, and major teaching hospitals have strong second opinion programs.
  3. Schedule the consultation and provide records in advance. Send records at least 1 week before your appointment so the second opinion physician can review them thoroughly.
  4. Ask specific questions. At the second opinion appointment: "Do you agree with this diagnosis?" "Is this treatment approach appropriate for my situation?" "Are there alternative approaches?" "What would you recommend if I were your parent?"

When the Second Opinion Conflicts

If the second opinion significantly differs from the first โ€” different diagnosis, different treatment recommendation, or meaningfully different approach โ€” Medicare covers a third opinion consultation. At this point, you have three choices: accept the first doctor's recommendation, accept the second doctor's recommendation, or seek a third opinion. In making this decision, consider which doctor's explanation of the reasoning was more convincing, which has more subspecialty experience with your specific condition, and whether the differences are in diagnosis (more important) or in treatment approach (often a matter of style when both options are reasonable).

Second Opinion Costs Under Medicare

Medicare Part B covers second and third surgical opinion consultations with the same cost-sharing as any other specialist visit โ€” 20% coinsurance after the annual Part B deductible. With Medigap Plan G, the second opinion consultation costs you $0 after meeting the $257 annual deductible. There is no limit on which provider you choose for the second opinion โ€” you can see any Medicare-participating physician, at any institution, in any state.

  • Request copies of all your medical records before seeking a second opinion
  • Choose a second opinion physician at a different institution for truly independent perspective
  • For cancer, seek NCI-designated cancer centers for pathology review and treatment planning
  • Medicare covers both second and third opinions โ€” use this benefit without hesitation
  • Give the second opinion physician your records in advance โ€” not the day of the appointment