Summary & Overview
HCPCS G4006: Gastroenterology MIPS Specialty Set
HCPCS Level II code G4006 identifies the Gastro-enterology MIPS specialty set, a collection of quality measures used for specialty-specific reporting under the Merit-based Incentive Payment System. Nationally, specialty MIPS sets like G4006 matter because they structure performance reporting for gastroenterology clinicians, influence value-based payment adjustments, and guide quality improvement efforts across outpatient specialty practices.
Key payers in this analysis include Aetna, Blue Cross Blue Shield, Cigna, UnitedHealthcare, and Medicare. Readers will find a concise explanation of what G4006 represents, the typical clinical and administrative settings where it applies, and the implications for reporting and performance benchmarking. The publication covers benchmarks where available, relevant policy context for MIPS specialty sets, and practical considerations for documentation and measure alignment.
This summary is intended for a national audience of clinicians, billing managers, and policy analysts seeking a clear, actionable description of HCPCS Level II code G4006 and its role in gastroenterology quality reporting. Data not available in the input will be noted where applicable in detailed sections.
Billing Code Overview
HCPCS Level II code G4006 is defined as the Gastro-enterology MIPS specialty set, representing a set of quality measures or reporting elements specific to gastroenterology for use in the Merit-based Incentive Payment System (MIPS). The code denotes specialty-level reporting and performance measurement rather than a discrete clinical procedure.
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Service type: Quality measurement / specialty performance reporting
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Typical site of service: Ambulatory clinic or specialty practice where gastroenterology providers participate in MIPS reporting
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Clinical & Coding Specifications
Clinical Context
A 58-year-old patient with longstanding gastroesophageal reflux disease and new-onset iron-deficiency anemia is referred to a gastroenterology specialty practice participating in MIPS quality reporting. The patient presents for an initial gastroenterology consultation and diagnostic evaluation. The clinic visit includes review of prior records, focused history and examination, counseling about potential endoscopic evaluation, and documentation required for MIPS specialty set reporting. Pre-visit tasks include chart review and abnormal test result reconciliation; post-visit tasks include submission of specialty-specific quality measures and attestation for MIPS reporting.
Typical workflow: the patient checks in at an outpatient gastroenterology clinic or ambulatory surgical center, nursing triage and vitals are recorded, the gastroenterologist performs the consultation and documents medical decision making, orders upper endoscopy or colonoscopy when indicated, and completes the MIPS specialty set documentation elements before the claim with billing code G4006 is submitted. Billing and coding staff append appropriate modifiers to reflect unusual circumstances (for example, modifier 22 for increased procedural services when documentation supports substantially greater work).
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
22 |