How Often Will Insurance Pay for a Bone Density Test?

Most health insurance plans pay for a bone density test once every 24 months, and how often insurance will pay for a bone density test beyond that depends on your age, sex, plan type, and whether your doctor can document a medical reason for testing sooner. Women 65 and older, and certain younger postmenopausal women with risk factors, qualify for a free preventive screening under the Affordable Care Act. Medicare uses the same two-year cycle for beneficiaries who meet one of its qualifying conditions. If your doctor documents medical necessity, both Medicare and most private insurers allow scans on a shorter schedule.

The Standard 24-Month Rule

The baseline across almost every plan is one covered bone mass measurement every 24 months. Medicare Part B writes this directly into its benefit, and private insurers generally follow the same interval.¹ In Medicare’s case, the clock starts at least 23 months after your last covered measurement.²

Private plans have room to vary. Some extend the waiting period if your last scan showed minimal bone loss, on the theory that a stable result doesn’t justify a repeat at the standard interval. Others allow annual scans when a doctor provides evidence of significant decline. Employer plans, marketplace plans, and Medicare Advantage plans each set their own documentation thresholds, so the summary of benefits is where you find your specific rule.

Free Preventive Screening for Eligible Women

The U.S. Preventive Services Task Force gives bone density screening a Grade B recommendation for two groups: women 65 and older, and postmenopausal women younger than 65 who have at least one risk factor for osteoporosis, such as low body weight, a parent who broke a hip, smoking, or excessive alcohol use.³

Under the ACA, any service with a Grade A or B USPSTF recommendation must be covered at zero cost when provided in-network. No deductible, no co-pay, no coinsurance.⁴ For women in those two groups, the every-24-months screening is free.

Men are left out of the free-preventive category. The USPSTF concluded there is not enough evidence to recommend for or against routine osteoporosis screening in men, giving it an “I” (insufficient) grade.³ Because the ACA’s zero-cost mandate only applies to A and B recommendations, insurers do not have to waive cost-sharing for men. Men can still get coverage when a doctor orders the test, but it is typically billed as diagnostic, and normal deductibles and coinsurance apply.

Medicare’s Qualifying Conditions

Medicare Part B covers a bone mass measurement once every 24 months for beneficiaries who meet at least one of these conditions:¹

Your doctor has determined you are estrogen-deficient and at clinical risk for osteoporosis based on your medical history.
Your X-rays show possible osteoporosis, osteopenia, or vertebral fractures.
You are taking prednisone or another steroid-type drug, or you are about to start.
You have been diagnosed with primary hyperparathyroidism.
You are being monitored to see whether your osteoporosis drug therapy is working.

After the Part B deductible, you generally owe 20 percent coinsurance for the test. Medicare Advantage plans may structure cost-sharing differently, and some require preauthorization before the scan.

When You Can Get Tested Sooner

Medicare explicitly allows more frequent testing when your doctor determines it is medically necessary, and most private insurers follow the same principle.¹ Insurers are most likely to approve accelerated testing in these situations:

You have started a new osteoporosis medication, and your doctor wants a follow-up scan to check whether the drug is preserving or rebuilding bone. Medicare covers this as a qualifying condition.¹
You are on long-term glucocorticoids. Clinical guidelines recommend a baseline DXA before steroid therapy lasting longer than six months, with follow-up scans at 6- to 12-month intervals depending on whether preventive treatment has started.⁵
A prior scan showed a sharp drop in bone mineral density, and your doctor wants to track whether the decline is continuing.
A new vertebral fracture or imaging finding suggests bone loss.

Documentation is what gets the earlier scan approved. Your doctor’s order should spell out the clinical reason and, where possible, reference the specific condition that justifies the shorter interval. A vague request for “follow-up” without supporting records is the fastest route to a denial.

Preventive vs. Diagnostic Coding

The single detail that most often decides what you pay is how the test is coded. When a scan is submitted as preventive for an ACA-eligible woman, the insurer must cover it without cost-sharing regardless of internal frequency rules. When the same scan is ordered for diagnostic purposes, such as evaluating unexplained back pain or monitoring treatment in someone outside the USPSTF preventive category, the insurer’s frequency limits, documentation requirements, and cost-sharing all apply. Ask your doctor’s office how the claim will be submitted before you go in.

What You’ll Pay if It’s Not Free

For a diagnostic scan, your deductible applies first. Until you meet it, you pay the full allowed amount. After the deductible, coinsurance kicks in, commonly 20 percent of the negotiated rate. Some plans use a flat co-pay for imaging instead.

Where you get the scan matters. Medicare’s procedure price lookup shows that the approved amount for a DXA scan (CPT code 77080) ranges from roughly $29 at a freestanding imaging center to $106 at a hospital outpatient department.⁶ Choosing a freestanding center over a hospital-based facility can cut your bill significantly, especially before the deductible is met.

Bone density tests are eligible medical expenses under Health Savings Accounts, Flexible Spending Accounts, and Health Reimbursement Arrangements.⁷ If you owe a deductible or coinsurance, you can pay your share from one of these accounts.

If Your Claim Is Denied

Read the explanation of benefits first. The three common denial reasons each have a different fix: the insurer decided the test was not medically necessary, you had not waited long enough since your last scan, or the claim was submitted with incorrect coding.

Coding errors are the easiest to resolve. CPT 77080 covers a standard central DXA scan of the axial skeleton.⁸ If the wrong code was used, or the diagnosis code doesn’t match the insurer’s approved indications, the billing office can submit a corrected claim without a formal appeal.

For medical necessity denials, ask your doctor’s office to request a peer-to-peer review. This is a phone call between your treating physician and the insurer’s medical director, and it resolves a surprising number of disputes because the reviewer gets clinical context that doesn’t come through on a claim form.

If the peer-to-peer doesn’t work, file a formal internal appeal. Under the ACA, you have 180 days from the date of the denial notice to submit a written appeal.⁹ Include your doctor’s letter explaining medical necessity, prior scan results, lab work, medication lists, and the specific CPT and diagnosis codes. If the internal appeal fails, you have the right to an external review by an independent third party, and that reviewer’s decision is binding on the insurer. Your denial letter should explain how to request external review; if it doesn’t, call your state’s department of insurance.

1
Medicare.gov. Bone Mass Measurements
2
Noridian Medicare. Bone Mass Measurements – JF Part B
3
U.S. Preventive Services Task Force. Osteoporosis to Prevent Fractures: Screening
4
HealthCare.gov. Preventive Health Services
5
NCBI Bookshelf. An Overview of Glucocorticoid-Induced Osteoporosis
6
Medicare.gov. Procedure Price Lookup for Outpatient Services – 77080
7
Internal Revenue Service. Publication 502 Medical and Dental Expenses
8
Centers for Medicare & Medicaid Services. Billing and Coding: Bone Mass Measurement
9
HealthCare.gov. Appealing a Health Plan Decision – Internal Appeals