Whole Body Dual XRay Absorptiometry to Determine Body Composition
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This policy governs coverage determinations for whole-body DXA body composition studies (measurement of lean mass, fat mass, regional composition) for Blue Cross Blue Shield - Rhode Island members, including Medicare Advantage and Commercial products.
No material clinical or coverage changes in this revision.
Coverage determination
General coverage stance
Coverage determination for whole-body DXA body composition studies:
Decision based on insufficient evidence that DXA body composition studies improve net health outcomes; no studies identified where DXA findings were used to guide management to improve outcomes.
Dual-energy x-ray absorptiometry (DXA) body composition studies are not covered for Medicare Advantage Plans and are considered not medically necessary for Commercial Products. This exclusion applies to DXA body composition services billed using miscellaneous or unlisted procedure codes, including CPT 76499.
For Commercial Products, whole-body DXA body composition studies are considered not medically necessary because the available evidence is insufficient to demonstrate an improvement in net health outcomes. Systematic reviews and studies have primarily evaluated DXA in research settings, often using DXA as a reference method, and no studies were identified in which DXA measurements were used to guide patient management that resulted in improved outcomes.
Potential clinical indications (reviewed but not accepted)
Potential clinical indications reviewed in background but not accepted as covered indications due to insufficient evidence:
These uses were described in the background literature review but the policy found the evidence insufficient to demonstrate that DXA body composition measurements improve net health outcomes or were used to guide management that improved outcomes.
Relevant billing codes
| 76499 | Unlisted diagnostic radiographic procedure |
What providers must do
Prior authorization not required
Prior authorization: Not applicable.
Verify member benefits and eligibility
Verify member benefits and eligibility before scheduling; benefits and coverage are determined by the member's subscriber agreement or employer agreement and may vary by contract.
- Call the provider call center for member-specific benefits as needed.
DXA body composition studies not covered / not medically necessary
Dual-energy x-ray absorptiometry (DXA) body composition studies are considered not covered for Medicare Advantage Plans and are considered not medically necessary for Commercial Products.
- CPT 76499 (Unlisted diagnostic radiographic procedure) is listed as not covered/not medically necessary.
Benefits may vary by group/contract
Benefits may vary between groups/contracts; refer to the member's Evidence of Coverage or Subscriber Agreement to determine whether a particular service is covered.
Confirm coverage with subscriber agreement and provider services
Determine benefits and eligibility from the member's subscriber agreement, member certificate, or employer agreement and contact the provider call center for member-specific questions.
- Policy language superseded by subscriber/employer documents.
Member financial liability when service is non‑covered or not medically necessary
If a service is determined to be not medically necessary or a non-covered benefit, do not charge the member unless you have informed the member and they have agreed in writing in advance to pay.
- Refer to your participation agreement for applicable provisions regarding member billing.
Denial risk for non‑covered or not medically necessary services
Denial risk: services that are not medically necessary or non‑covered may be denied; members may only be billed if they were informed and provided written agreement to pay in advance.
- DXA body composition studies are specifically identified as not covered for Medicare Advantage and not medically necessary for Commercial Products.
Policy informational notice
This policy is provided for informational purposes and is not a guarantee of payment; use clinical judgment when treating patients and confirm benefits prior to providing services.
Policy revision and currency notice
BCBSRI reserves the right to review and revise this policy at any time; the policy may change as medical practices, technology, and knowledge evolve.
Services determined not covered
Whole-body DXA body composition studies are not covered for Medicare Advantage Plans and are not medically necessary for Commercial Products. See coding: CPT 76499 (Unlisted diagnostic radiographic procedure) is listed as not covered / not medically necessary.
Background and rationale
Whole-body dual-energy x-ray absorptiometry (DXA) uses low-dose x-rays at two different energy levels to estimate bone mineral content and to quantify soft tissue composition, including fat mass and lean mass. DXA provides regional measurements (for example, arms, legs, and trunk) and relies on manufacturer-specific algorithms and underlying assumptions (such as constant hydration of fat-free mass) that affect accuracy and precision.
If a service is determined to be not medically necessary or a non-covered benefit under a member’s plan, the provider may not bill the member for that service unless the member has been informed in advance and has provided written agreement to accept financial responsibility. Benefits and eligibility are determined by the member’s subscriber agreement, member certificate, or employer agreement; providers should verify member-specific benefits with the plan.
Key definitions
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