Step-by-Step Guide to Medicare DEXA Bone Density Scan Coverage
Medicare covers DEXA bone density scans at no cost for people who meet one of five risk criteria. Here's how eligibility, the 24-month frequency rule, and out-of-pocket costs actually work.
Who Is Eligible for a Medicare-Covered Bone Density Scan?
Medicare does not cover bone density scans for everyone. To qualify for a free scan, your doctor or healthcare provider must order the test. You must also meet at least one of five specific risk criteria.
Medicare has set these rules to ensure that scans go to those who need them most. The five approved risk groups include:
- Women who are estrogen-deficient and at risk for osteoporosis: Estrogen is a hormone that acts like a shield, slowing down the cells that break down bone. When estrogen levels drop, such as after menopause, this shield is gone. Bones can thin quickly. If a doctor determines a woman is low in estrogen and has other risk factors, Medicare will cover the scan.
- People with X-ray evidence of bone weakness: If a standard X-ray shows signs of osteoporosis, osteopenia (which means thinning bones), or vertebral fractures (broken bones in the spine), Medicare will cover a DEXA scan to get a precise measurement.
- People taking steroid medications: Glucocorticoids, which are steroid-type drugs like prednisone, can weaken bones over time. If you have been taking these medications for more than three months, or if your doctor expects you to be on them for that long, you qualify for a covered scan.
- People with primary hyperparathyroidism: This is a condition where the parathyroid glands in your neck are overactive. These glands control calcium. When they are overactive, they pull calcium out of your bones and put it into your blood, making your bones weak.
- People being monitored during osteoporosis treatment: If you are already taking an FDA-approved drug to treat osteoporosis, Medicare will cover scans to see if your medication is working.
To read the official rules on who qualifies, you can view Medicare's official bone mass measurement guidelines.
How Often Will Medicare Pay for a DEXA Scan?
Under normal circumstances, Medicare Part B will pay for a bone density scan once every 24 months. Federal regulations measure this as 23 months after the month of your last scan.
This two-year gap exists because bone density changes very slowly. For most people, scanning more often is not helpful. It takes time to see a measurable difference in bone strength, whether you are tracking natural bone loss or seeing if a treatment is working.
However, there are exceptions to this rule. Medicare will cover more frequent scans if your doctor can show that they are medically necessary. Some common reasons for more frequent scans include:
- You started taking steroid medications long-term.
- You had a significant change in your osteoporosis medication.
- You have a medical condition that causes rapid bone loss.
Medicare also covers confirmatory baseline scans. If your very first bone test was a peripheral scan, which is a simpler test done on a smaller bone like your wrist or heel, your doctor may want to confirm the results with an axial scan. An axial scan is a more detailed test that measures your spine and hip. Medicare will cover this follow-up scan even if it happens sooner than 24 months after your first test.
You can read the exact legal guidelines for these frequency rules in the Federal regulations on bone mass measurement frequency.
What Are the Out-of-Pocket Costs for a DEXA Scan Under Medicare?
Your out-of-pocket costs for a DEXA scan depend on the type of Medicare coverage you have and whether your provider accepts Medicare.
| Coverage Type | What You Pay (If Eligible) | Rules to Remember |
|---|---|---|
| Original Medicare Part B | $0 | Must meet one of the 5 risk groups. Provider must accept assignment. |
| Medicare Advantage (Part C) | $0 | Must meet one of the 5 risk groups. Typically must use an in-network facility. |
Under Original Medicare Part B, a bone density scan is classified as a preventive service. This means you pay nothing. You do not have to pay a copay, coinsurance, or even your yearly deductible.
However, this $0 cost only applies if your doctor and the facility where you get the scan accept assignment. Accepting assignment means the doctor agrees to accept the Medicare-approved amount as full payment for the service. If they do not accept assignment, you may have to pay a portion of the bill.
If you have a Medicare Advantage plan, which is a private health plan that bundles your Medicare coverage, you still have access to this free benefit. By law, Medicare Advantage plans must cover the same preventive services as Original Medicare.
The main difference is that Medicare Advantage plans often require you to use an in-network doctor and facility. If you go to an out-of-network provider for your DEXA scan, you may have to pay for the test yourself.
If you do not meet Medicare's eligibility criteria, or if you want a scan for general wellness purposes, you will have to pay the full cost out of pocket. Out-of-pocket costs for a DEXA scan can vary widely depending on the facility and your location. It is always a good idea to call the imaging center beforehand to ask what they charge for self-pay patients.
How Do Providers Bill Medicare for Bone Mass Measurements?
For healthcare providers, billing Medicare for bone density scans requires using specific codes to prove medical necessity. If these codes are not used correctly, Medicare will deny the claim, and the patient may receive an unexpected bill.
Common Billing Codes
Providers use CPT codes (Current Procedural Terminology codes) to tell Medicare which test was performed. The most common codes include:
- 77080: This code is used for an axial DEXA scan. This is the standard scan that measures bone density in the central skeleton, which includes the spine, hip, or pelvis.
- 77081: This code is used for a peripheral DEXA scan. This measures bone density in the limbs, such as the wrist, heel, or finger.
- 77085: This code is used when a provider performs an axial DEXA scan along with a vertebral fracture assessment, which is an extra check to look for hidden breaks in the spine.
Medicare explicitly does not cover older testing methods. For example, single-photon absorptiometry (CPT code 78350) and dual-photon absorptiometry are not covered.
Diagnosis Codes and Documentation
To get a claim paid, the provider must also submit an ICD-10-CM diagnosis code. This code tells Medicare why the patient needs the test. For example, a provider might use code Z79.51 to show that a patient is on long-term steroid therapy, or code M81.0 to show a diagnosis of postmenopausal osteoporosis.
Medicare also requires strict documentation. The medical record must show a written order from the treating physician. It must also include a separate, detailed report written by the doctor who interpreted the scan results.
Advance Beneficiary Notices (ABNs)
If a doctor thinks Medicare might not pay for a scan, they should ask the patient to sign an Advance Beneficiary Notice. This is a standard form that warns you that Medicare may deny the claim.
This often happens if you are getting a scan sooner than the 24-month limit. If you sign this form and Medicare denies the claim, you will be responsible for paying the bill. If the doctor does not give you this form before the scan and Medicare denies the claim, you may not have to pay.
What Are the Most Common Questions About Medicare DEXA Coverage?
Does Medicare cover bone density scans for men?
Yes, men can qualify for a covered bone density scan. However, the rules are slightly different than they are for women. Medicare automatically covers screening for postmenopausal women who are at risk due to low estrogen.
For men, Medicare does not cover scans based on age alone. To get a covered scan, a man must meet one of the other risk factors. This includes taking steroid medications for more than three months, having primary hyperparathyroidism, or showing signs of bone loss or spine fractures on an X-ray.
Does Medicare cover whole-body DEXA scans for body composition?
No, Medicare does not cover whole-body DEXA scans that are used to measure body fat or muscle mass. While the technology is the same, scans used for fitness, weight loss, or general body composition are considered elective. Medicare only covers DEXA scans when they are medically necessary to measure bone strength and diagnose bone diseases.
What happens if my DEXA scan shows osteopenia?
Osteopenia means your bones are thinner than normal, but they are not yet weak enough to be classified as osteoporosis. Think of osteopenia as a warning sign.
If your scan shows osteopenia, Medicare will continue to cover monitoring scans every 24 months so your doctor can track your bone health. This is the perfect time to take action.
Personalized exercise and physical therapy programs can help you build bone strength and improve your balance, which lowers your risk of falling and breaking a bone.
How Can You Take Charge of Your Bone Health Today?
A DEXA scan is a powerful tool for protecting your independence, letting you catch silent bone loss before a fracture occurs. If your Medicare-covered scan reveals osteopenia or osteoporosis, the next crucial step is taking action to protect your skeleton.
This is where Groove Health connects directly to your care. Groove Health is a Medicare-covered bone health program designed to help you act on your DEXA results right from home. The program pairs you with a specialized doctor and a dedicated physical therapist who design a personalized, evidence-based exercise plan. By focusing on targeted weight-bearing exercises to build bone strength and balance training to prevent falls, this customized care model is specifically built to reduce your risk of fractures and keep you moving safely.
By combining early detection from your Medicare-covered DEXA scan with Groove Health's proactive, home-based exercise program, you can actively rebuild your bone strength and maintain your independence. To get started, you can Sign up for Groove Health's bone health program.
Works Cited
- Centers for Medicare & Medicaid Services. "Bone mass measurements." Medicare.gov, 2026.
- National Institute of Arthritis and Musculoskeletal and Skin Diseases. "Osteoporosis Overview." NIAMS, 2023.
This content is for informational purposes only and does not constitute medical advice. Consult a qualified healthcare professional for diagnosis and treatment. If you are on Medicare and interested in a personalized bone health program, you can check your eligibility at groovehealth.com.
