Summary & Overview
CPT 77085: Bone Density of Axial Skeleton with Vertebral Fracture Assessment
CPT code 77085 covers measurement of bone mineral density of the axial skeleton with an assessment for vertebral fracture, a diagnostic service used to identify osteoporosis and other bone diseases. Nationally, this code matters because bone density testing guides fracture risk management, influences treatment decisions, and contributes to preventive care pathways for older adults and at-risk populations.
Key payers in coverage discussions include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of clinical intent and typical settings, plus an outline of what to expect in payer coverage and billing practice. The publication summarizes common modifiers and billing considerations, standard sites of service, and the clinical context for ordering the study.
This resource provides benchmarks for utilization and payment where available, highlights relevant policy drivers that affect coverage nationally, and clarifies coding scope to aid accurate claims submission. It is intended for clinicians, billing professionals, and policy analysts seeking a practical reference to the clinical purpose and administrative handling of CPT code 77085.
Billing Code Overview
CPT code 77085 describes a procedure in which the provider measures bone mineral density of the axial skeleton and performs an assessment for vertebral fracture. The procedure is used to evaluate patients for osteoporosis and other metabolic bone diseases.
Service type: Diagnostic imaging / bone densitometry with vertebral fracture assessment
Typical site of service: Outpatient imaging center or hospital outpatient department, and can also be performed in physician offices equipped for DXA scanning.
Clinical & Coding Specifications
Clinical Context
A typical patient is a 68-year-old postmenopausal woman referred by her primary care physician to evaluate for osteoporosis after a low-impact wrist fracture and a history of progressive height loss. The provider performs a dual-energy X-ray absorptiometry (DXA) scan of the axial skeleton, including lumbar spine and proximal femur, to measure bone mineral density and assesses lateral vertebral fracture assessment (VFA) images to identify occult vertebral compression fractures. The clinical workflow includes: scheduling the DXA with VFA, verifying patient identifiers and relevant history (prior fractures, bisphosphonate use, recent contrast studies), obtaining informed consent, positioning the patient supine on the DXA table, acquiring lumbar spine and hip BMD images, performing VFA lateral spine images, reviewing images for quality and artifacts, generating T-scores and Z-scores, documenting findings and comparison to prior studies if available, and communicating results to the referring clinician for management of osteoporosis or other metabolic bone disease.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
26 | Professional component | When reporting only the physician interpretation of the DXA/VFA separate from the technical scan provided by the facility or technologist |
TC |