Yes, insurance does cover mammograms in most cases, but what you pay depends on why you’re being screened. Under the Affordable Care Act, non-grandfathered health plans must cover screening mammograms for women 40 and older at no out-of-pocket cost when you use an in-network provider. A change that took effect with plan years beginning on or after January 1, 2026 goes further: follow-up imaging needed to complete a screening is now covered without cost-sharing too. Diagnostic mammograms ordered because of symptoms or a prior abnormal result can still trigger a deductible, coinsurance, or copay under many plans, and the rules shift again if you’re on Medicare, a grandfathered plan, or a short-term policy.
What’s Covered at No Cost
ACA-compliant group and individual market plans must cover a screening mammogram every one to two years for women 40 and older with no copay, coinsurance, or deductible, provided you use an in-network provider.1HealthCare.gov. Preventive Care Benefits for Women The U.S. Preventive Services Task Force updated its recommendation in April 2024 to biennial screening from age 40 through 74, which lines up with what plans already cover.
A few plan types sit outside these rules. Short-term health plans, grandfathered plans (those that existed before March 2010 and haven’t made certain changes), and health care sharing ministries are not required to cover mammograms at no cost. If you’re not sure whether your plan is grandfathered, check your Summary of Benefits and Coverage or call the number on your insurance card.
The 2026 Expansion: Follow-Up Imaging
Before 2026, the screening itself was free, but if the radiologist saw something that needed a closer look, the additional imaging could land on your bill. Updated Women’s Preventive Services Initiative guidelines changed that. When additional imaging is needed to complete the screening process, those services are now covered without cost-sharing. The guideline specifically includes MRI, ultrasound, additional mammography views, and pathology evaluations needed to finish evaluating what the initial screening found.2Federal Register. Supported Womens Preventive Services Guidelines Relating to Breast Cancer Screening
Non-grandfathered group health plans and individual market insurers must apply this expanded coverage starting with plan years beginning on or after January 1, 2026. The expansion has boundaries. It focuses on average-risk women and covers only imaging that completes an initial screening. Standalone diagnostic workups unrelated to a screening visit, supplemental screening for high-risk women, and coverage under Medicare, TRICARE, or grandfathered plans are not affected.
Screening vs. Diagnostic: Where the Bills Come From
The single biggest source of surprise mammogram bills is the line between screening and diagnostic. A screening mammogram is routine and scheduled without symptoms. A diagnostic mammogram is ordered because you have symptoms, a prior abnormal result, or a personal history of breast cancer. Diagnostic mammograms typically involve coinsurance of 20% to 40% of the allowed amount after you’ve met your deductible, with total costs generally running $250 to $600 depending on additional views, ultrasound, or hospital-based facility fees.
Here’s the trap that still catches people. You walk in for a routine screening, the radiologist spots something concerning, and the visit gets reclassified. Under Medicare billing rules, when a radiologist identifies signs or symptoms during a screening that require further evaluation, the additional imaging portion can be billed as diagnostic.3CMS. Billing and Coding Guidelines – Diagnostic Mammogram For ACA plans that have adopted the 2026 WPSI guidelines, that follow-up imaging should be covered without cost-sharing. If your plan year hasn’t yet turned over, or you’re on Medicare or a grandfathered plan, the same-day reclassification can still generate a bill.
If a bill shows up after what started as a screening, check two things: whether your plan has adopted the 2026 WPSI guidelines, and whether the imaging was coded correctly. Coding errors are among the most common causes of unexpected mammogram charges, and a call to the provider’s billing office often fixes them.
Medicare and Medicaid
Medicare Part B covers one screening mammogram every 12 months for women 40 and older. If your provider accepts Medicare assignment, you pay nothing for the screening.4Medicare.gov. Mammograms Medicare also covers a single baseline mammogram for women between 35 and 39.5Medicare. Your Guide to Medicare Preventive Services
Diagnostic mammograms under Medicare work differently. After you meet the Part B annual deductible of $283 in 2026, you pay 20% of the Medicare-approved amount.6CMS. 2026 Medicare Parts A and B Premiums and Deductibles The 2026 WPSI rule requiring no cost-sharing for follow-up imaging does not apply to Medicare, so this gap remains for Medicare beneficiaries.
Medicaid coverage varies by state. Some programs cover both screening and diagnostic mammograms with no cost-sharing; others impose restrictions based on income, age, or medical necessity. Your state’s Medicaid office can confirm what’s covered before you schedule.
Dense Breast Tissue and Supplemental Screening
Since September 2024, every mammography facility must notify you about your breast density. Under the FDA’s updated Mammography Quality Standards Act rule, your results letter will include a specific statement about whether your tissue is dense and what that means for cancer detection.7U.S. Food and Drug Administration. Important Information – Final Rule to Amend the Mammography Quality Standards Act Dense tissue makes cancer harder to spot on a standard mammogram and independently raises risk, and your doctor may recommend supplemental ultrasound or MRI.
Coverage for that supplemental screening is uneven. The 2026 WPSI expansion covers additional imaging needed to complete a screening, which can include ultrasound or MRI when the initial mammogram is inconclusive. Supplemental screening recommended solely because of dense tissue in an otherwise normal mammogram sits in a gray area. A growing number of states have passed laws requiring insurers to cover it, but there is no blanket federal mandate. Call your insurer first to confirm what’s covered under your specific plan.
In-Network vs. Out-of-Network
The no-cost-sharing guarantee depends on using an in-network provider.1HealthCare.gov. Preventive Care Benefits for Women Go out of network and you may owe the full bill. HMO plans generally won’t cover out-of-network mammograms at all unless an exception applies. PPO plans may offer partial out-of-network coverage, but your share will be significantly larger, and many insurers reimburse based on “usual, customary, and reasonable” rates for your geographic area, with anything above that benchmark falling on you.
Verify network status before you schedule, especially at unfamiliar facilities. Hospital-affiliated imaging centers and freestanding imaging centers can have different network statuses even within the same health system.
If You’re High Risk
Women with a personal or family history of breast, ovarian, tubal, or peritoneal cancer, or ancestry associated with BRCA mutations, follow a different screening path. The USPSTF gives a “B” recommendation to risk assessment for these women, and those who screen positive on a risk assessment tool should receive genetic counseling and, if indicated, genetic testing.8United States Preventive Services Task Force. BRCA-Related Cancer – Risk Assessment, Genetic Counseling, and Genetic Testing Because it’s a “B” rating, ACA plans must cover the assessment, counseling, and testing without cost-sharing for women who meet the criteria.
High-risk women often need enhanced surveillance, including breast MRI or more frequent imaging. Insurers usually cover these services when a doctor orders them based on clinical guidelines, but they aren’t always covered at 100%; deductibles, copays, and coinsurance may apply. The 2026 WPSI expansion addresses average-risk women and does not extend to supplemental screening for high-risk individuals. If your doctor recommends enhanced surveillance, get pre-authorization and confirm your cost-sharing responsibility before the appointment.
If You’re Uninsured
The CDC’s National Breast and Cervical Cancer Early Detection Program provides free or low-cost breast cancer screenings to women ages 40 to 64 with household incomes at or below 250% of the federal poverty level. Eligibility details vary by state, so contact your state health department to find out whether you qualify and where to get screened. If you’re diagnosed through the program, every state has opted into a Medicaid pathway that can cover treatment even if you weren’t previously enrolled.
If Your Claim Gets Denied
Mammogram claims get denied more often than you’d expect, and the reason is usually fixable. The most common causes are billing code errors (a screening coded as diagnostic, or vice versa), missing prior authorization, or the insurer deciding the service wasn’t medically necessary. Your Explanation of Benefits will state the specific reason. A coding error is often resolved with one call to the provider’s billing office to correct and resubmit.
When the denial sticks, you have the right to appeal. Start with an internal appeal to your insurer, where you or your doctor can submit additional records or a letter explaining medical necessity. If that’s denied, you can request an external review by an independent third party. Federal regulations require plans to allow at least four months from the date you receive the denial notice to request an external review.9eCFR. 45 CFR 147.136 – Internal Claims and Appeals and External Review Processes Don’t let that window close. Your state insurance department can help you navigate the process if you’re unsure where to start.