Summary & Overview
HCPCS G9199: VTE Prophylaxis Not Administered, Documented Reasons
HCPCS Level II code G9199 denotes documented clinical or patient reasons for not administering venous thromboembolism (VTE) prophylaxis on the day of or the day after hospital admission. This designation captures exceptions such as patients who are ambulatory, already therapeutically anticoagulated, expired during the inpatient stay, or who left against medical advice. Nationally, precise reporting of these exceptions informs quality measurement, hospital performance metrics, and payer audit processes related to inpatient VTE prevention.
Key payers included in this analysis are Aetna, Blue Cross Blue Shield, Cigna, UnitedHealthcare, and Medicare. Readers will gain an understanding of the clinical context for using G9199, typical inpatient service settings where it applies, and how exception reporting interacts with payer review and quality assessment. The publication summarizes common use cases, clarifies the intent of the code for documentation, and outlines what data elements are typically expected in claims supporting an exception.
The content covers benchmarks and reporting considerations relevant to hospitals and coding teams, highlights policy implications for national quality programs, and identifies areas where documentation must be explicit to support the exception. Data not provided in the input—such as specific modifiers, associated taxonomies, ICD-10 pairings, related codes, and detailed payer-specific rules—is noted as not available in the input.
Billing Code Overview
HCPCS Level II code G9199 documents cases where venous thromboembolism (VTE) prophylaxis was not administered on the day of or the day after hospital admission for documented reasons. The code covers clinical and patient-centered reasons for omission, for example: patient ambulatory, patient expired during inpatient stay, patient already on warfarin or another anticoagulant, other medical reasons, patient left against medical advice, and other patient reasons.
Service type: Inpatient VTE prophylaxis exception reporting
Typical site of service: Hospital inpatient setting
Clinical & Coding Specifications
Clinical Context
A typical patient scenario involves an adult admitted to an acute care hospital for an unrelated primary condition (for example, community-acquired pneumonia or acute heart failure) who, on the day of or the day after admission, does not receive pharmacologic venous thromboembolism (VTE) prophylaxis for documented reasons. The inpatient clinical workflow begins with triage and admission orders, including assessment of VTE risk and orders for prophylaxis (mechanical and/or pharmacologic). If the clinician documents a valid reason why pharmacologic VTE prophylaxis is not given — for example the patient is fully ambulatory, is already therapeutically anticoagulated at home (eg, on warfarin or a direct oral anticoagulant), has an active bleeding contraindication, expired during the inpatient stay, or left against medical advice — coding staff apply G9199 to indicate prophylaxis was intentionally not administered on the day of or the day after admission. Documentation typically resides in the admission history and physical, medication reconciliation, progress notes, and nursing medication administration records. The code supports quality reporting and payor review by explaining the clinical rationale for omission of prophylactic anticoagulation during the initial inpatient period.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
25 | Significant, separately identifiable evaluation and management service by the same physician on the day of a procedure |