Summary & Overview
HCPCS G8912: Wrong Site/Side/Patient/Procedure/Implant Event
HCPCS Level II code G8912 denotes documentation that a patient experienced a wrong site, wrong side, wrong patient, wrong procedure, or wrong implant event. As a marker of serious safety incidents in surgical and procedural care, this code is used to flag events that have major clinical and quality implications for hospitals, ambulatory surgery centers, and payers. Nationally, consistent documentation of these events supports quality reporting, root-cause analysis, and potential payer review or audit activity.
Key payers commonly involved in coverage and review of such events include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find an overview of the code’s clinical meaning and settings, typical payer considerations, and what documentation this code represents. The publication summarizes common billing modifiers reported with the service line and highlights where data is not available in the input, such as specific ICD-10 pairings or associated taxonomies.
This report is intended for a national audience of coding professionals, compliance officers, and policy analysts who need a concise reference to the code’s purpose, typical sites of service, and payer coverage context. Data not available in the input is noted where applicable.
Billing Code Overview
HCPCS Level II code G8912 documents when a patient experienced a wrong site, wrong side, wrong patient, wrong procedure, or wrong implant event. This code captures a serious patient safety incident related to care delivery errors.
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Service type: Safety event documentation and reporting for surgical and procedural care
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Typical site of service: Operative suites, ambulatory surgery centers, procedural areas, and inpatient surgical units
Clinical & Coding Specifications
Clinical Context
A 62-year-old male is scheduled for right total knee arthroplasty in an ambulatory surgery center. The orthopedic surgical team performs preoperative verification, site marking, and timeout; however, during incision the surgeon recognizes that the procedure is being performed on the left knee — a wrong side event is identified immediately. The surgeon stops the procedure, notifies the patient and family, documents the event in the medical record, notifies risk management and the hospital safety officer, and initiates the institution’s adverse event reporting process. The patient is stabilized, the planned operation on the correct site is rescheduled after multidisciplinary review, and additional informed consent is obtained prior to reoperation.
This billing code G8912 is used to document that a serious surgical safety event occurred: wrong site, wrong side, wrong patient, wrong procedure, or wrong implant. Typical sites of service include inpatient operating rooms, ambulatory surgery centers, and procedural suites. The clinical workflow includes immediate intraoperative recognition, cessation of the procedure, documentation of the event, patient notification, reporting to institutional safety and quality programs, root cause analysis, and coordination of follow-up care or corrective procedures.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
22 | Increased procedural services |