You booked a scan, lay on a table for about ten minutes, and now you are holding a multi-page report full of charts, percentages and unfamiliar terms. Sound familiar? If you have just had a DEXA scan San Diego appointment, or you are thinking about booking one, learning to read the numbers is where the real value begins.
A DEXA scan is one of the most precise ways to measure what your body is made of. Unlike a bathroom scale, it separates fat, lean muscle and bone, and it shows where each one sits. That is why a DEXA scan San Diego visit can reveal changes in your body that the scale never will.
In this guide, you will learn how to read every major section of your report, what the numbers mean, what is generally considered healthy, and what to do with the results. We will also cover cost, preparation and how often to repeat the test.
What Is a DEXA Scan and What Does It Measure?
DEXA stands for dual-energy X-ray absorptiometry. It uses two very low-dose X-ray beams to tell bone, lean tissue and fat apart. Because each tissue absorbs the beams differently, the scanner can estimate how much of each you carry, even down to specific body regions.
That is the difference between weight and composition. Two people can both weigh 170 pounds and have completely different amounts of fat, muscle and bone. A DEXA body composition scan shows you which profile is yours.
How the scan works
You lie still on an open table while a scanning arm passes over your body. A typical DEXA scan San Diego appointment takes about 10 to 15 minutes, with no needles, no tunnel and no special diet. The radiation dose is a small fraction of a standard chest X-ray.
What your body composition report includes
Most reports follow a similar layout, although the design varies by machine and software. A typical body composition report includes:
- Total body fat percentage and total fat mass
- Lean mass (muscle and other non-fat tissue), both total and by region
- Visceral fat, the fat stored deep around your organs
- Bone mineral content and density
- Android and gynoid fat, which show where fat is stored
- Percentile charts and, on repeat scans, trend graphs
Practical Tip: Always ask for the full report, not just a one-page summary. The regional charts and bone data are where most of the useful detail hides. If you are comparing options for a DEXA scan San Diego appointment, choose a clinic where a physician walks you through the results, as we do for every DEXA body scan at Timely Health.
How to Read DEXA Scan Results, Step by Step
The best way to read DEXA scan results from any DEXA scan San Diego provider is to work from the top of the page to the bottom. Start with the big-picture numbers, then move into regional and bone data. Think of this section as DEXA scan results explained in plain English.
1. Total body fat percentage
This is the share of your total weight that comes from fat. It is usually the first number on the report, and it is the one most people focus on. Context matters, though, because healthy ranges rise with age and differ between men and women.
| Category | Men | Women |
|---|---|---|
| Athletic | 6–13% | 14–20% |
| Fit | 14–17% | 21–24% |
| Average | 18–24% | 25–31% |
| Higher health risk | 25% and above | 32% and above |
These are general guidelines, not a diagnosis. A physician can place your number in context based on your age, medical history and goals.
2. Lean body mass and muscle
Lean body mass is everything in your body that is not fat or bone, mainly muscle, organs and water. The part you can change most is skeletal muscle. Look at total lean mass first, then compare your arms and legs.
Some reports also give an Appendicular Lean Mass Index (ALMI), which divides arm and leg lean mass by height squared. Values below roughly 7.0 kg/m² for men and 5.5 kg/m² for women are often linked with low muscle mass, though cutoffs vary by guideline. Protecting muscle matters at every age, and especially after 50.
👉 Read More: DEXA Scan for Weight Loss Tracking: Why the Scale Lies
3. Visceral fat
Visceral fat sits deep in the abdomen around organs such as the liver and intestines. Higher levels are linked with a greater risk of type 2 diabetes and heart disease. A visceral fat DEXA scan estimate is usually reported as an area in cm², or as grams or pounds.
Lower is better. Many reports flag an area above about 100 cm² as elevated, but thresholds vary by machine and software, so ask your physician how your report defines it.
Practical Tip: Visceral fat often responds well to regular walking, resistance training, better sleep and less alcohol. It can drop even when the scale barely moves.
4. Android and gynoid fat
Android fat is stored around the belly, while gynoid fat is stored around the hips and thighs. The android-to-gynoid (A/G) ratio compares the two. A ratio above roughly 1.0 in men or 0.8 in women is commonly cited as a sign of more central fat storage.
5. Bone mineral density
Your report shows bone mineral content and density, and it may include a T-score or Z-score. A T-score compares your bone density with that of a healthy young adult, while a Z-score compares you with people of your own age and sex.
| T-score | What it generally means |
|---|---|
| −1.0 and above | Normal bone density |
| −1.0 to −2.5 | Low bone mass (osteopenia) |
| −2.5 and below | Osteoporosis range |
A whole-body scan includes bone data, but diagnosing osteopenia or osteoporosis depends on dedicated hip and spine measurements. If bone health is a concern, for example after menopause, book a bone density scan San Diego patients can complete in the same clinic.
Reading the Charts: Percentiles, Trends and Regional Breakdown
Beyond the headline numbers, a good body composition report includes charts that put your results in perspective. They can feel intimidating at first, but each one answers a simple question.
Percentile charts
A percentile compares you with other people of your age and sex. The 50th percentile is average. Remember that average is not always optimal, so a high percentile for body fat is not a goal to chase.
Regional breakdown
The regional view splits fat and lean mass across your arms, legs and trunk. It can also show left-to-right differences. A small imbalance often reflects your dominant side, but a large gap can point to an old injury worth discussing with your physician.
Trend graphs
Your first scan is a baseline. The real power of a DEXA scan San Diego appointment shows up on the second and third scans, when the trend lines reveal whether you are losing fat, keeping muscle and protecting bone.
Practical Tip: Write down four numbers from every scan: body fat percentage, total lean mass, visceral fat and bone density. Tracking just those four makes progress easy to see.
What Is a Good DEXA Scan Result? Context and Common Mistakes
There is no single perfect number. A good result is one that is healthy for your age, supports your goals and moves in the right direction over time. Here are the most common mistakes people make when they review their first DEXA scan San Diego report.
- Comparing across different machines. Software and calibration differ, so use the same facility for repeat scans.
- Ignoring hydration. Being very dehydrated or just after a big meal can nudge the numbers slightly.
- Chasing tiny changes. A shift of less than about one percentage point in body fat is usually within normal variation.
- Focusing only on fat. Losing weight while losing muscle is not progress. Look at lean mass too.
- Self-diagnosing bone loss. Use the T-score as a conversation starter with your physician, not a verdict.
Practical Tip: For the most reliable comparisons, schedule each DEXA scan San Diego appointment at a similar time of day, eat and drink normally beforehand, and wear similar clothing.
Turning Your DEXA Scan San Diego Results Into an Action Plan
Numbers only matter if they change what you do. Once you understand your DEXA scan San Diego report, use it to choose one or two clear priorities rather than trying to fix everything at once.
If body fat or visceral fat is high
Focus on a modest calorie deficit, daily movement and strength training. If you have struggled for years, a medical weight loss program with physician guidance can help you lose fat while protecting muscle. An RMR metabolism test can also show how many calories your body actually burns at rest, so you are not relying on online estimates.
If lean mass is low
Prioritize resistance training two to three times per week and enough protein across the day. Then retest in a few months to see whether lean mass is trending up.
If you want to understand your fitness
Body composition is only one piece of the puzzle. A VO₂ max test measures how well your heart and lungs use oxygen, giving you a second, powerful health marker alongside your DEXA results.
Practical Tip: Pick one habit for each weak spot on your report, such as a 20-minute walk after dinner or two strength sessions per week. Small, repeatable habits beat dramatic plans.
DEXA Scan San Diego Cost, Preparation and How Often to Repeat
The DEXA scan cost San Diego patients pay can vary quite a bit between clinics, so it helps to know what is included. At Timely Health, a DEXA whole body scan is $125, with a $25 deposit when you book online and the balance paid at the clinic. A dedicated bone density scan starts at $200.
If you have been typing “DEXA scan near me” into Google, look for three things: a physician who reviews your results, a clear explanation of your report, and transparent pricing. Our clinic is in Rancho Bernardo, close to Poway, 4S Ranch and Mira Mesa, and you do not need a referral.
How to prepare
A little preparation before your DEXA scan San Diego visit keeps the results accurate and the appointment smooth.
- Wear comfortable clothing without metal zippers, buttons or underwire.
- Eat and drink normally unless your provider tells you otherwise.
- Skip calcium supplements for 24 hours if you are having a bone density scan.
- Tell the team if you could be pregnant or recently had a contrast or nuclear medicine test.
How often to repeat
If you are actively working on fat loss or muscle gain, every three to six months works well. For general monitoring, once a year is usually enough. Bone density follow-ups are often every one to two years, depending on your physician’s advice.
Final Thoughts
A DEXA report can look complicated, but it comes down to a few key questions. How much fat do you carry, and where? How much muscle do you have? How strong are your bones? Once you can answer those, your results turn from confusing charts into a clear roadmap.
The best part of getting a DEXA scan San Diego appointment is the ability to repeat it and watch your progress. Use your baseline, set one or two goals, and retest to see what is working.
Ready for clear answers? Book your appointment now!
FAQs
How do you read DEXA scan results?
Open your DEXA scan San Diego report and start with total body fat percentage, then check lean mass, visceral fat and bone density. Next, look at the regional charts and percentile comparisons. Because ranges depend on age and sex, a physician can help you interpret DEXA scan results in context.
What is a good body fat percentage on a DEXA scan?
For adults, roughly 14 to 24% for men and 21 to 31% for women is a commonly cited fit-to-average range. Healthy numbers rise with age, so your own target depends on your health and goals. Your physician can give you a personalized range.
How accurate is a DEXA scan for body composition?
DEXA is considered one of the more accurate non-invasive methods because it measures fat, lean mass and bone separately. Results can still vary slightly with hydration and machine type. Repeating scans under similar conditions gives the most reliable trend.
How much does a DEXA scan cost in San Diego?
Prices vary by clinic. At Timely Health, a DEXA scan San Diego residents book for whole body composition is $125, with a $25 online deposit, while a bone density scan starts at $200. HSA and FSA cards are accepted.
How often should you get a DEXA scan?
Many people who repeat a DEXA scan San Diego appointment do so every three to six months, which is common if you are actively changing your body composition. Once a year is typically enough for general monitoring. Your physician may suggest a different schedule for bone density.
Is a DEXA scan safe?
Yes, for most people. The radiation dose is very low, a small fraction of a chest X-ray. Let the team know in advance if you are or might be pregnant.