Summary & Overview
HCPCS G9309: No Unplanned Readmission Within 30 Days of Procedure
HCPCS Level II code G9309 represents the quality measure indicating no unplanned hospital readmission within 30 days of the principal procedure. As a standardized outcome metric, it matters nationally because it is used to monitor surgical quality, inform value-based payment models, and align hospital reporting with patient safety and care coordination goals. Payers increasingly incorporate readmission measures into performance frameworks, making this code relevant across commercial and public programs.
Key payers discussed include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find an overview of how this measure functions in surgical care, the typical settings where it applies, and what benchmarks and policy considerations commonly accompany 30-day readmission metrics. The publication outlines common reporting contexts, implications for quality measurement and payment programs, and areas where policy updates influence use of readmission indicators.
What readers will learn: the clinical and administrative intent of G9309, its role in quality and value-based programs, payer adoption trends, and practical considerations for tracking 30-day unplanned readmissions. Data not available in the input for specific payer rates, taxonomies, ICD-10 mappings, and related codes.
Billing Code Overview
HCPCS Level II code G9309 denotes no unplanned hospital readmission within 30 days of principal procedure. This measure captures whether a patient who underwent a principal surgical procedure was not readmitted to the hospital for an unplanned reason within 30 days of that procedure.
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Service type: Quality/outcome measure tied to surgical care and post-procedure outcomes
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Typical site of service: Inpatient surgical procedures with post-discharge follow-up and outcome tracking
Clinical & Coding Specifications
Clinical Context
A typical patient scenario involves an adult who underwent a scheduled principal surgical procedure (for example, elective total hip arthroplasty) during an inpatient stay and is monitored for post‑discharge outcomes. The billing code G9309 documents that the patient experienced no unplanned hospital readmission within 30 days of the principal procedure. Clinical workflow: during the index hospitalization the surgical team documents the principal procedure and discharge plan. Post-discharge surveillance occurs via outpatient follow‑up visits, phone calls from the surgical clinic or case management, and review of hospital claims or electronic health record encounter data for 30 days. If no unplanned inpatient readmission attributable to the index operation or its complications is identified within 30 days, G9309 is reported to indicate successful avoidance of unplanned readmission within the measurement window. Typical site of service is inpatient acute care for the principal procedure with follow‑up in outpatient clinic or home monitoring. Common patient characteristics include recent surgery, routine postoperative recovery without complications requiring rehospitalization, and engagement with discharge planning and outpatient follow‑up.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
22 | Increased procedural services |