How Often Osteoporosis Needs a Repeat DEXA Scan: A Scan Calendar

Updated 10 October 2026

Many people with osteoporosis wonder how often a bone density scan should be repeated. Two reputable sources give different answers, because the right interval depends on the situation, and the scan itself is only useful if the next one can be compared with the last.

This guide gathers what the Royal Osteoporosis Society, the Bone Health and Osteoporosis Foundation, the National Institute of Arthritis and Musculoskeletal and Skin Diseases and MedlinePlus say about repeat scans, then offers an interval table, a scan calendar, a note on the T-score and a checklist for keeping reports comparable. Use it to prepare for the conversation with your clinician about timing, which depends on your own results.

What the Royal Osteoporosis Society, Bone Health and Osteoporosis Foundation and NIAMS say about repeat bone density scans

The Royal Osteoporosis Society describes a bone density scan as a scanning arm that passes over your body and takes images of your lower spine and hips, two of the most common places where bones break. Among the outcomes of a scan and fracture risk assessment, it lists a follow-up scan to monitor bone density in two to five years.

The Bone Health and Osteoporosis Foundation page on when to repeat a bone density test says that, as with any medical test, a repeat should happen when the results might influence treatment plans. It is often repeated 1-2 years after starting or changing osteoporosis treatment to evaluate response, and it might also be repeated in 1-2 years if you are not being treated but are close to a treatment threshold. Subsequent testing varies according to your individual situation. The foundation's booklet, Bone Health and Osteoporosis Foundation, says that if you have osteoporosis you should repeat the test every one to two years to see whether your bones are losing density or staying the same.

The National Institute of Arthritis and Musculoskeletal and Skin Diseases lists monitoring the effectiveness of treatment among the reasons for a test, and explains that DXA usually measures bone density at the hip and spine because the weak bones that most often break are there.

The sources agree that there is no single schedule. They differ in wording because they describe different situations, which the next section sets out side by side.

Scan dates and the clinician's stated reason for each can be saved in the Daily Journal of Osteoporosis Journey (by Health Journey Labs) as short typed or spoken entries, so the interval question starts from your own dates.

Two to five years or one to two years: what the sources say changes the interval

The intervals quoted by different sources look contradictory until they are laid out by situation. The table below keeps the wording of each source, so you can see which situation is closest to yours and ask your clinician which applies.

Scan interval table, by Osteoporosis Journey

The foundation says a repeat belongs where the result might influence treatment plans. That is a useful test for any proposed scan: ask what decision it could change. If the answer is none, a longer wait may make sense. If the answer is that treatment would be reviewed, a repeat sooner is easier to justify.

Write the interval your clinician gives you, with the reason in their words, on the first line of the calendar in the next section.

Before the visit, Osteoporosis Journey can hold the question what would a repeat scan change? at the top of your notes, with the answer added in the clinician's words.

A scan calendar: date, site measured and T-score

A calendar makes the interval visible, and it keeps results in a form that can be compared across years. MedlinePlus says T-scores may be used for postmenopausal women and men aged 50 or older, and the Royal Osteoporosis Society says results may be given as a T-score, which compares your bone density with the normal range for young healthy adults, and may also be given as a Z-score, which compares it with people of your own age. The Bone Health and Osteoporosis Foundation says that for postmenopausal women and men aged 50 and over the T-score is the number used for diagnosis.

Scan calendar table, by Osteoporosis Journey

Fill in the site measured from the report, because the sources note that DXA usually measures the hip and spine, and a scan of another site, such as the forearm, is a different measurement. Keep the reason, because the sources tie the interval to the reason. Leave the last column blank until your clinician names a date.

From Osteoporosis Journey, we recommend entering the next due date as a reminder the same day you receive it (Osteoporosis Journey checklist), since the interval is only useful if someone remembers when it ends.

Each scan row can be kept in Osteoporosis Journey beside dated notes on falls and symptoms, which gives the clinician the weeks between scans as well as the numbers.

What a one-point T-score change is described to mean

A repeat scan produces a new number, and it is natural to wonder what the difference means. The National Institute of Arthritis and Musculoskeletal and Skin Diseases says the risk of broken bones increases by 1.5 to 2 times with each 1-point drop in the T-score, and that the lower your T-score, the higher your risk of bone fracture. The Institute also describes the categories: a T-score of minus 1 or higher is healthy bone, while the Bone Health and Osteoporosis Foundation says a T-score of minus 2.5 or below is a diagnosis of osteoporosis.

T-score change list, by Osteoporosis Journey

• A T-score compares your bone density with a young healthy adult, so zero is that reference.
• A Z-score compares it with people of your age, and is used for younger people.
• A one-point drop is described by NIAMS as raising fracture risk by 1.5 to 2 times, which is a risk for groups, not a prediction for you.
• The foundation adds that a diagnosis can be made at a better T-score if you have already had a fracture, or if FRAX shows high risk.
• The Royal Osteoporosis Society notes it is normal for results to change with age.

Treat any small change between two scans with care. Two scans can differ for reasons of measurement as well as bone, and the sources do not give a figure for a meaningful change beyond the T-score guide. Ask your clinician how they read the difference.

Writing the clinician's reading of each change beside the number in Osteoporosis Journey keeps the meaning attached to the result, so it is easy to explain to a new clinician later.

Keeping reports comparable from one scan to the next

The Bone Health and Osteoporosis Foundation booklet says that, if possible, you should have the same test done at the same place to allow your healthcare provider to better compare your results. The foundation's Bone Health and Osteoporosis Foundation adds that tests at peripheral sites such as the wrist, fingers or heel are not comparable to central DXA measurements, and that screening tests should not be used to see how well a treatment is working. It also says the ideal facility has staff trained and certified by an organization such as the International Society for Clinical Densitometry.

Comparable report steps, by Osteoporosis Journey

1. Check that both scans measured the same sites, such as the lumbar spine and the hip.
2. Check that both were the same kind of test, because peripheral results are not comparable to central DXA.
3. Note whether the two scans were done at the same facility, and ask for the same one when possible.
4. Note any change in treatment between the dates, since that is often why the second scan was ordered.

Keep a copy of every report, the full report as well as the T-score line, because it lists the sites and the method. If you move or change clinic, bring all previous reports. The guide to tracking labs and DEXA dates alongside pain weeks describes how to pair scan dates with how the weeks felt.

Report photos attached to dated entries in Osteoporosis Journey keep sites and methods with the numbers, which is the part that is most often missing when two scans are compared years apart.

Questions to ask at the next visit about the scan date

The interval is a decision shared between you and your clinician, and a short list of questions makes it explicit. The Bone Health and Osteoporosis Foundation says subsequent testing varies according to your individual situation, so the answer depends on facts about you that your clinician knows.

Questions about the next DEXA scan date

Osteoporosis Journey lists these questions to find out why the next scan falls on a given date.

• When should my next scan be, and what is the reason for that date?
• What decision would the result change, such as a review of my treatment?
• Which sites will be measured, and can the same facility be used?
• Am I close to a treatment threshold, and does that shorten the interval?
• If I have had a fracture or a fall since the last scan, does it change the plan?
• What should I do if I notice height loss or new back pain before the date?

Write each answer in the clinician's words and enter the date straight away. The guide to preparing for a short osteoporosis visit offers a one-page layout for the rest of the appointment, and the guide to getting through a high bone-pain or fracture-fear day covers the weeks in between.

When the visit comes, Osteoporosis Journey can export a Doctor Report with scan dates and recent weeks as one page, and My Care Team keeps the answers to these questions afterward.

How Osteoporosis Journey can help

A notebook table is enough to keep scan dates in order. If you want scan dates, falls and symptoms in one dated history, the best osteoporosis apps guide compares the choices.

Osteoporosis Journey is a personal osteoporosis tracker from Health Journey Labs on the App Store and Google Play. A clear reason for each scan and a note of the sites measured make the next comparison straightforward. Across a decade, the calendar shows how the interval followed your situation. Below is what you can use and how each part helps.

• My Meds — Logs medicine names, timing, dose; app-specific items: bone medicines, calcium/vitamin D you actually use as directed, pain options your clinician already cleared; read together with movement weeks, sleep, near-falls, the rest of the tracked history.
• Daily check-in — Logs physical symptoms, emotional state, nutrition, sleep, exercise, meds, external factors; app-specific items: pain, movement confidence, near-falls or falls, fear of fracture; read together with the rest of the logged history.
• Daily Journal — Logs free-text notes, voice entry; app-specific items: what movement was limited, footwear or lighting near a stumble, caregiver help, visit debriefs, leftover fear after a fall, a look-fine mismatch line; read together with scores and other logged history (adds context).
• Flare Tracker — Logs flag a day clearly worse than the usual hard week; app-specific items: a real fall, a cluster of near-falls, pain that jumps above baseline; read together with history across weeks (one-off spike vs repeating pattern).
• My Labs — Logs result dates; app-specific items: DEXA, vitamin D, calcium, other bone-related tests; read together with meds, falls, movement, function.
• Learn — Logs short education topics, prompts; app-specific items: meds adherence, falls awareness, cleared movement, visit prep, why fear of falling still belongs in the log; read together with your own logged weeks.
• AI companions — Logs Clara (general chat), specialist companions; app-specific items: knowledge, fitness, nutrition, relationships; read together with your logged history (companions already see it); used for: visit wording; a calm caregiver script; a listening ear after a scary near-fall night.
• Weekly Goals — Logs one small aim, whether it held; read together with real check-ins.
• My Care Team — Logs clinicians, short visit notes; app-specific items: tends to ask mainly about DEXA rather than near-falls; read together with logged history; used for: visit prep (what to ask and bring); notes during the visit; review afterward.
• Doctor Report — Logs one-page summary exported from logged history; app-specific items: dates, meds taken, falls or near-falls, movement, pain, how you functioned; read together with the history already logged; visit type: bone.
• My Assessments — Logs structured check-ins beyond daily scores, onboarding life and social context; read together with ongoing history.
• Food Tracker — Logs meal or drink lines, nutrition; read together with energy, sleep, bone-care.
• Weight Tracker — Logs scale or body notes; read together with the rest of the logged history.
• Period Tracker — Logs start and stop dates, flow, how heavy or light bleeding felt; read together with bone-care or pain, everything else logged.

Everything you log builds one history, and insights get stronger as it grows. Custom symptoms let you add your own labels.

Sources

• Royal Osteoporosis Society: Bone density scan (DEXA / DXA)
• Bone Health and Osteoporosis Foundation: Bone density testing
• Bone Health and Osteoporosis Foundation: Talking with your doctor
• National Institute of Arthritis and Musculoskeletal and Skin Diseases: What the numbers mean
• MedlinePlus: Bone density scan

FAQ

The answers below draw on the sources cited in this guide, and the app they mention is Osteoporosis Journey (by Health Journey Labs).