You don’t need a doctor’s referral to get a DEXA scan for body composition. Most people book one directly through a fitness-focused testing facility, university sports medicine clinic, or medical imaging center that offers self-pay body composition scans. The process is straightforward, takes about 10 to 15 minutes, and costs between $75 and $150 at most commercial locations, though prices at hospital-based imaging centers can exceed $300.
Where to Book a Scan
The easiest route is through a commercial body composition testing service. Fitnescity, for example, partners with over 400 locations nationwide and lets you search for a nearby facility online. Companies like DexaFit and BodySpec operate dedicated scanning studios in major metro areas. These businesses cater specifically to people tracking fitness progress, so the experience is geared toward body fat and muscle data rather than a clinical bone density evaluation.
University sports medicine departments and research centers often offer scans to the public as well. UC Davis Health, for instance, runs a body composition analysis program through its sports medicine division. These academic settings sometimes charge less and provide detailed reports with advanced metrics. Hospital-based imaging centers also have DEXA machines, but they’re primarily set up for osteoporosis screening and may charge significantly more for a full-body composition scan.
To find a location, search for “DEXA body composition scan” plus your city. Look for providers that specifically advertise body composition or body fat testing, not just bone density. The machine is the same, but the software mode and report format differ.
Cost and Insurance
Insurance almost never covers a DEXA scan done for body fat tracking. Coverage typically applies only to bone density screening for people at risk of osteoporosis, such as postmenopausal women over 65 or those on certain medications. Medicare, for instance, covers bone density scans under those conditions but not elective body composition testing.
Out-of-pocket prices vary widely. Commercial fitness labs typically charge $75 to $150 per scan, and many offer discounted packages if you plan to scan multiple times over the year. Hospital imaging centers average above $300. If cost matters, fitness-focused providers are almost always the better deal for body composition purposes.
How to Prepare
Preparation is minimal, but a few details affect your results. Wear loose, comfortable clothing without metal zippers, belts, or buttons. Athletic wear works well. Remove any metal jewelry before the scan. You can eat normally beforehand, though staying consistent with your hydration and meal timing matters if you plan to compare results across multiple scans.
If you take calcium supplements, stop them 24 to 48 hours before your appointment. This applies mainly to bone density accuracy but is standard guidance. No fasting is required.
What Happens During the Scan
You lie flat on an open table while a scanning arm passes slowly over your body from head to toe. There’s no enclosed tube, no noise, and no discomfort. The entire scan takes roughly 10 minutes. The machine uses two low-energy X-ray beams to differentiate between fat tissue, lean tissue, and bone at every region of your body.
Radiation exposure is extremely low, typically between 0.001 and 0.01 millisieverts. For perspective, a chest X-ray delivers about 0.1 millisieverts, so a DEXA scan exposes you to roughly 10 to 100 times less radiation than that single chest film. This makes repeat scanning safe for tracking purposes.
What Your Report Tells You
A body composition DEXA report goes far beyond a single body fat percentage. You’ll get a regional breakdown showing how fat and lean mass are distributed across your trunk, arms, and legs. This is uniquely useful because it reveals asymmetries and helps you understand where you carry fat and muscle.
Several key metrics typically appear on the report:
- Total body fat percentage is the headline number most people want. DEXA measures this with a margin of error of about 1 to 2%, making it one of the most precise methods available.
- Visceral adipose tissue (VAT) measures the fat packed around your internal organs, which is distinct from the fat under your skin. This is the type most strongly linked to cardiovascular and metabolic disease risk, and it’s information you can’t get from a scale or skinfold calipers.
- Skeletal muscle mass estimates your total muscle tissue, while appendicular lean mass focuses specifically on your arms and legs. These numbers help identify whether you’re building or losing muscle over time.
- Fat-free mass index (FFMI) compares your non-fat mass to your height, giving a size-adjusted view of how muscular you are. Think of it as a more useful version of BMI for people who exercise.
- Whole-body bone density shows your average skeletal density. While this isn’t a diagnostic osteoporosis scan, it flags systemic bone health trends. A t-score above negative 1.0 indicates normal bone density.
For muscle loss screening, research uses specific cutoff values. An appendicular lean mass to height ratio below 5.5 for women or 7.0 for men may indicate low muscle mass. For people who are overweight, the appendicular lean mass to BMI ratio is more informative, with cutoffs around 0.51 for women and 0.79 for men.
How Often to Scan
If you’re using DEXA to track progress during a fat loss phase or muscle-building program, scanning every three to six months gives you meaningful data. Shorter intervals rarely show enough change to distinguish real progress from normal day-to-day fluctuation, especially given the 1 to 2% margin of error in body fat measurement.
Consistency between scans matters more than the absolute numbers on any single report. Try to scan at the same time of day, with similar hydration levels, and ideally on the same machine. Different DEXA machines can produce slightly different readings, so sticking with one facility improves the reliability of your comparisons over time.
DEXA Compared to Other Methods
DEXA’s 1 to 2% margin of error makes it considerably more accurate than bioelectrical impedance scales (the body fat feature on smart scales), which can swing by 5% or more depending on hydration. Skinfold calipers depend heavily on the skill of the person measuring and only sample a few sites on the body. Hydrostatic (underwater) weighing is similarly accurate to DEXA but far less convenient and doesn’t give you regional data or visceral fat measurements.
The real advantage of DEXA isn’t just precision. It’s the depth of information. No other widely available method tells you how much fat sits around your organs, whether your left leg carries less muscle than your right, or how your bone density is trending. For anyone serious about understanding their body composition rather than chasing a single number, it’s the most practical option available.