Summary & Overview
HCPCS G8631: Documentation of Ineligibility for Prophylactic Parenteral Antibiotics
HCPCS Level II code G8631 indicates clinician documentation that a patient was not an eligible candidate for prophylactic parenteral antibiotics administered within one hour before surgical incision (or within two hours for fluoroquinolones or vancomycin). This code captures a specific perioperative documentation event that affects surgical antibiotic timing metrics and quality reporting. Nationally, consistent use of this code supports accurate measurement of appropriate perioperative antibiotic administration and clarifies when exceptions to timing standards were clinically documented.
Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find context on the code’s clinical purpose, typical service and site of service, and how the code fits into perioperative quality measurement. The publication outlines benchmarks and policy-relevant implications for coding compliance and quality reporting where available, and highlights that specific payer coverage, modifier use, taxonomy mappings, and related diagnosis code pairings are not provided in the input.
This summary serves clinicians, coding professionals, and policy analysts seeking a concise national-level overview of the code’s role in documenting exceptions to prophylactic antibiotic timing standards prior to surgical procedures.
Billing Code Overview
HCPCS Level II code G8631 documents that a clinician determined a patient was not an eligible candidate for ordering prophylactic parenteral antibiotics to be given within one hour (or two hours for fluoroquinolones or vancomycin) prior to surgical incision or procedure start when no incision is required.
Service Type: Perioperative prophylactic antibiotic eligibility assessment / documentation
Typical Site of Service: Operating room, procedure suite, ambulatory surgery center, or other procedural setting where prophylactic parenteral antibiotics would be considered prior to incision
Data not available in the input.
Clinical & Coding Specifications
Clinical Context
A typical patient is a 62-year-old male scheduled for an elective lower extremity arthroplasty. Preoperative evaluation by the surgical team documents that routine prophylactic parenteral antibiotics normally ordered within one hour prior to incision are not appropriate in this case because the patient has a documented severe allergy to beta-lactams and to vancomycin, and the procedure-specific organisms are not covered by available alternative agents. The clinician records that the patient is not an eligible candidate for ordering prophylactic parenteral antibiotics to be given within one hour (or within two hours if the agent would be a fluoroquinolone or vancomycin) prior to surgical incision.
The workflow: the surgeon and preoperative nurse review allergies and recent microbiology; anesthesia confirms timing of medication administration; the clinician documents the medical rationale for omitting prophylactic parenteral antibiotics in the preoperative note and on the operative anesthesia record. This documentation supports billing of G8631 to indicate that, after evaluation, the patient was not eligible to receive the recommended prophylactic parenteral antibiotics within the specified time window prior to incision.
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 |