Summary

Medicare provides meaningful coverage for breast cancer screening and treatment, including mammograms, surgery, therapy and certain prostheses. Your out-of-pocket costs depend on the type of service you receive, whether it’s considered preventive or diagnostic, and whether care is provided as an outpatient or during a hospital stay.

🩻 Screening and diagnostic mammograms

Medicare Part B (outpatient coverage) fully covers screening mammograms for women age 40 and older once every 12 months, meaning you typically pay nothing for the screening itself as long as the provider accepts Medicare. If a screening mammogram finds something concerning (or your doctor has another reason to investigate), you may need a diagnostic mammogram. Diagnostic tests are generally not treated the same as preventive screenings, so you’ll usually be responsible for a share of the cost after meeting your Part B deductible. If your doctor determines it’s medically necessary, Medicare can cover diagnostic mammograms more than once per year.

Takeaways:

• Screening mammograms are covered at 100% by Part B once every 12 months for women 40+.
• Diagnostic mammograms typically cost you 20% of the Medicare-approved amount after the Part B deductible.
• Diagnostic mammograms may be covered more than once a year if medically necessary.

Key Terms

• Screening mammogram: A preventive imaging test used to look for breast cancer before symptoms appear.
• Diagnostic mammogram: A follow-up mammogram used to evaluate a specific concern, such as an abnormal screening result or symptoms.
• Medicare Part B: The part of Medicare that generally covers outpatient care, preventive services and medically necessary tests.

🏥 Breast cancer surgery and prostheses

Breast cancer surgeries, such as lumpectomy or mastectomy, may be covered under Medicare Part A or Part B depending on where and how the procedure is performed. Part A applies when you’re formally admitted to a hospital as an inpatient, while Part B generally applies for outpatient procedures. Reconstructive breast surgery is covered under Original Medicare, and certain breast prostheses may also be covered. For example, implants placed during an inpatient hospital stay may fall under Part A, while implants placed in an outpatient setting are typically covered under Part B. Part B may also help cover external prostheses, including certain post-surgical bras.

Takeaways:

• Inpatient breast cancer surgery is typically covered under Part A; outpatient procedures are generally covered under Part B.
• With outpatient surgery, you usually pay 20% of the Medicare-approved amount after the Part B deductible.
• Medicare may cover reconstruction and certain prostheses (implanted or external), depending on the setting and medical need.

Key Terms

• Medicare Part A: The part of Medicare that generally covers inpatient hospital care and related services.
• Inpatient vs. outpatient: “Inpatient” means you’re admitted to the hospital; “outpatient” means you receive care without being admitted.
• Breast prosthesis: An implanted or external device used to restore breast shape after surgery.

💉 Chemotherapy, radiation therapy and related care

Chemotherapy and radiation therapy are often provided in outpatient settings, even when administered at or through a hospital facility. Because they’re typically outpatient services, Medicare Part B commonly covers these treatments. Beyond major therapies, Medicare may also help cover connected services that are part of breast cancer care, such as physician visits, second (and sometimes third) surgical opinions, physical therapy after surgery, and mental health services. Emotional support can be an important part of treatment, and Medicare coverage for mental health care may help address depression or anxiety that can accompany a diagnosis.

Takeaways:

• Chemotherapy and radiation therapy are often covered by Part B because they’re usually administered on an outpatient basis.
• Medicare may also cover doctor visits, surgical second opinions, physical therapy and mental health services connected to breast cancer care.
• Coverage and costs can vary based on where you receive care and how services are billed.

Key Terms

• Chemotherapy: Drug treatment used to kill cancer cells or stop them from growing.
• Radiation therapy: Treatment that uses high-energy rays to destroy cancer cells or shrink tumors.
• Medicare-approved amount: The amount Medicare determines is reasonable for a service; your cost share is often based on this figure.

🧾 What you may pay and why it varies

Medicare can cover many breast cancer services, but your share of the cost often depends on whether the service is preventive (like a routine screening mammogram) or diagnostic/therapeutic (like diagnostic imaging, outpatient surgery, chemotherapy or radiation). It also depends on whether you’re treated as an inpatient under Part A or as an outpatient under Part B. In general, Part B services may involve meeting the annual deductible and then paying coinsurance, while Part A inpatient care may involve an inpatient deductible and cost rules that depend on the length of your hospital stay. Because the setting and billing classification matter, it’s smart to confirm in advance whether a procedure is scheduled as inpatient or outpatient and to ask how the service will be billed.

Takeaways:

• Preventive screenings can be covered differently from diagnostic tests and treatments.
• The same procedure may be billed under Part A or Part B, depending on whether you’re admitted to the hospital.
• Asking how services will be billed can help you anticipate your costs and avoid surprises.

Key Terms

• Deductible: The amount you may need to pay before Medicare starts paying its share for certain covered services.
• Coinsurance: The percentage of costs you may pay after meeting a deductible (often 20% for many Part B services).
• Out-of-pocket costs: What you pay yourself for covered care, such as deductibles, coinsurance and certain copays.

Conclusion

Medicare generally covers screening mammograms, diagnostic mammograms when medically necessary, and many breast cancer treatments—including surgery, chemotherapy, radiation therapy and certain prostheses. The biggest driver of what you pay is whether care is preventive vs. diagnostic, and whether services are delivered as outpatient (often Part B) or inpatient (often Part A). If you’re planning treatment, confirming how services will be billed and what’s covered can help you budget more confidently.