A mammogram is an X-ray of the breast used to screen for cancer or investigate a suspicious finding. There are two types with very different cost implications: screening mammograms (for women with no symptoms, done on a routine schedule) and diagnostic mammograms (ordered when a symptom, lump, or abnormal screening result needs follow-up). The distinction matters enormously for what you pay.
Screening mammograms are classified as preventive care under the ACA and Medicare, which means they are covered at $0 cost-sharing on most plans. Diagnostic mammograms are treated as medical services, subject to your deductible and coinsurance. The 2024 USPSTF updated its recommendation to biennial (every two years) screening starting at age 40 for average-risk women, replacing its prior guideline of starting at 50. That change means more women in their 40s will qualify for no-cost screening through insurance.
This guide covers what a mammogram costs without insurance in 2026, what Medicare and ACA plans pay, the difference between 2D and 3D (tomosynthesis), where site of service affects your bill, and how to access free or low-cost mammograms if you are uninsured. Women who qualify for Medicaid typically receive mammograms at $0 or minimal cost. A mammogram that shows a suspicious finding often leads to a follow-up diagnostic CT scan or biopsy, each billed separately.
Mammogram Cost by Site of Service in 2026
The biggest cost driver of Mammogram is the site of service: where the procedure is performed. 2026 CMS price transparency data confirms a 2-3x billing differential between independent centers and hospital outpatient departments.
Mammogram prices without insurance vs. 2026 Medicare rates| Site of Service | Range Without Insurance | 2026 Medicare Rate |
|---|
| Freestanding women's health or imaging center (screening 2D) | $100 – $250 | $0 (screening, no cost-share) |
| Freestanding imaging center (screening 3D tomosynthesis) | $200 – $400 | $0 (covered annually) |
| Hospital outpatient department (screening 2D or 3D) | $250 – $500 | $0 (screening, no cost-share) |
| Any setting (diagnostic mammogram, unilateral or bilateral) | $300 – $600 | 20% after $283 deductible |
Medicare rates for screening mammograms reflect $0 beneficiary cost-sharing under the preventive benefit. Diagnostic mammogram rates reflect 2026 Medicare PFS and OPPS allowed amounts, with 20% coinsurance after the $283 Part B deductible.
Source: CMS Physician Fee Schedule 2026, CMS OPPS 2026, FAIR Health Consumer, GoodRx
Why the Same Procedure Is So Much More at a Hospital
Hospital-based mammography departments charge facility fees on top of the professional reading fee, which can push a routine screening to $400-$500 even though the same exam costs $150-$200 at a freestanding women's health center. Because screening mammograms are preventive, insurance typically covers 100% at both locations, but your out-of-pocket cost if uninsured is meaningfully higher at a hospital.
For diagnostic mammograms, the site-of-service gap matters even more. Medicare's 2026 Physician Fee Schedule (PFS) pays approximately $157 for a diagnostic bilateral mammogram at a non-facility setting; the Hospital Outpatient PPS (OPPS) pays approximately $165 for the same procedure at a hospital outpatient department. Your 20% coinsurance is therefore higher when the procedure is done at a hospital.
The practical rule: for routine screening, any accredited facility (hospital or freestanding) is covered at $0 under Medicare and most ACA plans. For diagnostic imaging, ask whether the facility bills a separate facility fee and, if so, consider a freestanding radiology or breast imaging center to reduce your share.
Mammogram Cost by Type in 2026
The most important cost split for mammograms is not body part but exam type: screening vs. diagnostic, and 2D vs. 3D. These affect both your out-of-pocket cost and how the claim is classified by your insurer.
Typical cost by variant| Exam Type | Without-Insurance Range | Medicare Cost-Share |
|---|
| Screening 2D bilateral (annual) | $100 – $250 | $0 |
| Screening 3D tomosynthesis bilateral (annual) | $200 – $400 | $0 |
| Diagnostic unilateral | $200 – $400 | 20% after $283 deductible |
| Diagnostic bilateral | $300 – $600 | 20% after $283 deductible |
| Baseline exam (age 35-39, Medicare) | $100 – $250 | $0 (one-time) |
Medicare covers one baseline exam between ages 35-39 at $0, then one screening mammogram every 12 months starting at age 40. Diagnostic mammograms are covered subject to Part B cost-sharing regardless of frequency.
Source: CMS Medicare Benefit Policy Manual, FAIR Health Consumer 2025-2026
What Medicare Pays for Mammogram
Medicare Part B covers screening mammograms at $0 cost-sharing, with no Part B deductible applied. Eligible women receive one baseline exam between ages 35-39 and one screening mammogram every 12 months starting at age 40. This coverage applies as long as the provider accepts Medicare assignment. In 2026, the Medicare Physician Fee Schedule (PFS) pays approximately $126 for a bilateral screening mammogram; the beneficiary owes nothing. For 3D tomosynthesis, Medicare also covers the add-on at $0 for screening.
Diagnostic mammograms, ordered when a symptom or abnormal finding needs follow-up, are treated differently. They are subject to the standard Part B rules: 20% coinsurance after the 2026 Part B deductible of $283. If you have a Medigap supplement (Plan G, Plan N, etc.) that covers Part B coinsurance, your share is reduced or eliminated. Medicare Advantage plans cover mammograms under the same rules as Original Medicare for preventive screenings, but cost-sharing for diagnostic mammograms varies by plan.
What Factors Affect Cost
- Screening vs. diagnostic: screening is $0 under Medicare and ACA plans; diagnostic is subject to deductible and coinsurance.
- 2D vs. 3D (tomosynthesis): 3D adds $50-$150 without insurance; both are covered at $0 under Medicare for screening.
- Site of service: hospital outpatient departments charge 30-50% more than freestanding breast imaging centers for cash-pay patients.
- Geographic region: mammogram prices in major metro areas are typically 40-60% higher than in suburban or rural markets.
- Insurance deductible status: if you have commercial insurance and your deductible is not yet met, a diagnostic mammogram will apply to the deductible.
- Whether the radiologist is in-network: even if the imaging facility is in-network, the interpreting radiologist may be out-of-network and bill separately.
- Need for additional views or ultrasound: a callback after screening may result in additional diagnostic imaging charges.
Common Mammogram Billing Errors
Mammogram billing errors are common and often go unchallenged. Before paying a mammogram bill, check for these issues:
- Screening mammogram billed as diagnostic (or vice versa): affects whether preventive coverage applies and whether you owe cost-sharing.
- Separate facility fee charged when the exam was performed at a hospital-affiliated imaging center that bills at hospital rates.
- 3D tomosynthesis add-on billed when only a 2D mammogram was performed, or 2D billed when you received 3D.
- Radiologist reading fee billed out-of-network even though the imaging facility was in-network.
- Callback imaging (additional views or ultrasound after screening) billed without notifying you it would create a separate charge.
- Medicare screening mammogram billed with the Part B deductible applied, when screening exams are exempt from the deductible.
Frequently Asked Questions
How much does a mammogram cost without insurance in 2026?
Without insurance, a 2D screening mammogram costs $100-$250 at a freestanding imaging or women's health center. 3D tomosynthesis screening costs $200-$400. A diagnostic mammogram, ordered for follow-up of a symptom or abnormal result, costs $300-$600. Hospital outpatient departments charge 30-50% more than freestanding centers for cash-pay patients.
Does Medicare cover mammograms at no cost?
Medicare Part B covers one screening mammogram per year at $0 cost-sharing for women 40 and older. The Part B deductible does not apply. Medicare also covers one baseline mammogram between ages 35-39 at $0. Diagnostic mammograms are subject to the standard 20% coinsurance after the 2026 Part B deductible of $283.
Is a 3D mammogram (tomosynthesis) covered by Medicare?
Yes. Medicare covers 3D mammography (tomosynthesis) for annual screening at $0 cost-sharing. The add-on for digital breast tomosynthesis is covered when performed alongside a standard screening mammogram. Some Medicare Advantage plans cover 3D screening as well, but check your plan's summary of benefits to confirm.
What is the difference between a screening mammogram and a diagnostic mammogram for billing?
A screening mammogram is performed on a woman with no symptoms as part of routine cancer detection. Under Medicare and ACA-compliant plans, it is classified as preventive care and covered at $0. A diagnostic mammogram is ordered when there is a symptom, lump, or abnormal screening result. It is treated as a medical service, subject to your deductible and coinsurance. The same imaging equipment may be used, but the billing classification changes your out-of-pocket cost significantly.
Where can I get a free or low-cost mammogram if I am uninsured?
The CDC's National Breast and Cervical Cancer Early Detection Program (NBCCEDP) provides free or low-cost mammograms for uninsured or underinsured women ages 40-64 with household income at or below 250% of the federal poverty level ($37,650 for a household of 1 in 2026). Contact the CDC at 1-800-232-4636 or visit cdc.gov to find a local program. Federally Qualified Health Centers (FQHCs) and some hospital systems also offer sliding-scale fees.
When should I start getting mammograms according to 2026 guidelines?
The USPSTF updated its recommendation in April 2024 to biennial (every two years) screening starting at age 40 for average-risk women, through age 74. This is a Grade B recommendation, which means ACA-compliant plans must cover it at $0 cost-sharing. Medicare additionally allows annual (yearly) screening starting at 40, which is more frequent than the USPSTF minimum. Women with a family history or elevated risk should discuss earlier or more frequent screening with their doctor.
Does ACA insurance cover mammograms at $0?
Yes, for screening mammograms. ACA-compliant plans are required to cover USPSTF Grade B preventive services at $0 cost-sharing, with no deductible applied. Because the USPSTF now gives biennial mammograms starting at age 40 a Grade B rating, plans must cover them at no cost. Diagnostic mammograms ordered for medical follow-up are not preventive services and are subject to your plan's standard cost-sharing.
Why did I get charged for a mammogram I thought was free?
There are several common reasons. First, if your screening generated a callback for additional views or an ultrasound, that follow-up imaging is diagnostic, not preventive, and subject to cost-sharing. Second, your mammogram may have been billed as diagnostic rather than screening. Third, if you went to a hospital-affiliated imaging center, a facility fee may have been added. Review your Explanation of Benefits (EOB), confirm the billing code, and call your insurer if the screening-vs-diagnostic classification looks wrong.
