Summary & Overview
HCPCS G8399: Central DXA Documented Results
HCPCS Level II code G8399 indicates that a patient has documented results of a central dual-energy x-ray absorptiometry (DXA) ever being performed. This administrative code captures the presence of prior central DXA testing in the medical record, which is important for longitudinal bone health assessment, osteoporosis management, and care coordination. Nationally, standardized documentation of prior DXA testing supports appropriate clinical decision-making and billing transparency.
Key payers in this overview include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise explanation of the code's clinical context and use, typical sites of service, and which payers are commonly involved in coverage and documentation workflows. The publication summarizes available benchmarks where provided, notes relevant policy or coding updates when applicable, and situates the code within diagnostic imaging and bone health service lines.
This summary is intended for clinicians, revenue cycle staff, and policy analysts seeking a national perspective on the purpose and administrative role of HCPCS Level II code G8399. Data not available in the input for detailed payer-specific reimbursement rates, associated taxonomies, ICD-10 pairings, and related codes is noted where applicable.
Billing Code Overview
HCPCS Level II code G8399 documents that a patient has ever had a central dual-energy x-ray absorptiometry (DXA) performed and records the documented results. The service type reflected by this code is diagnostic imaging documentation, focused on bone density measurement history. The typical site of service for documentation of prior central DXA testing is outpatient clinic or imaging center, including clinical offices where prior imaging results are recorded in the medical record.
Data not available in the input.
Clinical & Coding Specifications
Clinical Context
A 68-year-old postmenopausal woman presents to a primary care clinic for routine osteoporosis risk assessment after a wrist fracture sustained from a low-energy fall. The clinician documents a history of prior central dual-energy x-ray absorptiometry (DXA) testing performed at an outside facility and obtains the scanned report for the medical record. The workflow includes verification of the prior central DXA (hip and lumbar spine) report, documenting the date and results in the chart, and determining if a current DXA is required for management. Documentation includes the test type (central dual-energy x-ray absorptiometry), site imaged (lumbar spine and/or proximal femur), date of the prior study, numeric T-scores and/or Z-scores, and interpretation. The clinical team may attach the outside imaging report or enter discrete results into the electronic health record to support bone health management decisions and billing. Typical site of service is an outpatient clinic or ambulatory care setting where medical record review and reconciliation occur; the actual imaging would be performed in a radiology department or outpatient imaging center.
Coding Specifications
- Below are the most clinically relevant modifiers for a service documenting that a prior central DXA was performed. Use only one appropriate modifier per claim line as required by payer rules.
| Modifier | Description | When to Use |
|---|---|---|
22 |