Summary & Overview
HCPCS G1010: Clinical Decision Support Mechanism (Stanson)
HCPCS Level II code G1010 designates a clinical decision support mechanism — identified here as Stanson — used under the Medicare Appropriate Use Criteria program to inform ordering clinicians at the point of care. Nationally, this code reflects the growing integration of health IT tools aimed at improving appropriateness of advanced diagnostic imaging and reducing unnecessary tests. Its adoption affects facility and clinician workflows, documentation, and compliance with federal AUC requirements.
Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise briefing on the clinical purpose of the code, the typical service setting, and the policy context around AUC-driven clinical decision support. The publication summarizes what to expect for coverage recognition and coding practice across major payers, outlines common modifiers and administrative considerations, and highlights the clinical context for use of decision support technology in outpatient settings.
This summary provides national-level context useful for billing managers, health IT teams, compliance officers, and clinicians seeking a clear reference for how G1010 is positioned within AUC implementation and payer documentation requirements. Data not available in the input is noted where applicable.
Billing Code Overview
HCPCS Level II code G1010 represents a clinical decision support mechanism used in connection with the Medicare Appropriate Use Criteria (AUC) program. The description specifies the clinical decision support mechanism as Stanson, indicating an electronic or software-based tool that provides point-of-care guidance to clinicians to promote appropriate use of advanced diagnostic imaging.
Service Type: Clinical decision support / health IT service
Typical Site of Service: Outpatient clinic or other ambulatory care settings where ordering clinicians access AUC decision support at the point of care
Data not available in the input for associated taxonomies, ICD-10 diagnoses, and related codes.
Clinical & Coding Specifications
Clinical Context
A 67-year-old patient with a history of coronary artery disease is scheduled for evaluation of a newly ordered coronary CT angiography. Prior to performing the CT, the ordering clinician uses an appropriate use criteria (AUC) clinical decision support mechanism to determine whether the imaging is appropriate based on the patient’s symptoms, prior test results, and risk factors. The clinical workflow: the ordering provider enters the indication and relevant clinical data into the AUC software integrated with the electronic health record; the G1010 service documents that the clinical decision support mechanism was consulted and provided an appropriate use determination at the time of order; the ordering clinician reviews the AUC output and proceeds with scheduling the imaging study if indicated. Typical site of service is outpatient imaging centers or hospital outpatient radiology departments where appropriate use criteria reviews are required prior to advanced diagnostic imaging.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
22 | Increased procedural services | Use when the clinical decision support process required substantially greater work beyond standard AUC review (rare for G1010). |