Summary & Overview
HCPCS G2146: Postoperative Leg Pain Outcome (VAS Improvement)
HCPCS Level II code G2146 documents a standardized postoperative leg pain outcome at one year after surgery. The code captures either low residual leg pain (VAS or numeric score ≤ 3.0 at 9–15 months) or a substantial improvement from baseline (a reduction of ≥ 5.0 points from a preoperative score measured within three months). Nationally, codes that record patient-reported outcomes are increasingly important for care quality measurement, value-based contracting, and longitudinal outcome tracking.
Key payers addressed include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise presentation of the code’s clinical meaning, the likely service setting for documentation, and the implications for performance measurement and postoperative follow-up. The publication summarizes benchmark considerations, coding context, and clinical interpretation of the pain thresholds used for G2146.
This summary provides clinicians, coding professionals, and policy analysts with the clinical definition and use case for G2146, clarifies where the assessment typically occurs, and outlines what to expect in a national policy and payer landscape focused on patient-reported outcomes.
Billing Code Overview
HCPCS Level II code G2146 describes postoperative leg pain outcomes measured by patient-reported pain scales. The code applies when leg pain at one year (9 to 15 months) postoperatively is less than or equal to 3.0 on the visual analog scale (VAS) or numeric pain scale, or when leg pain measured preoperatively within three months and at one year postoperatively demonstrates an improvement of 5.0 points or greater.
Service Type: Postoperative clinical outcome assessment (pain measurement)
Typical Site of Service: Outpatient surgical follow-up or clinic visit where standardized pain assessment is performed
Clinical & Coding Specifications
Clinical Context
A 56-year-old patient underwent lumbar decompression and fusion for lumbar radiculopathy causing significant leg pain. Preoperative assessment documented leg pain of 7–8/10 on the numeric pain scale. The patient completed standard postoperative follow-up visits and standardized pain assessments at three months and at one year (9–15 months). At the one-year visit the leg pain is documented as 2/10, meeting the outcome criteria in G2146 (leg pain ≤ 3.0 or improvement ≥ 5.0 points versus preoperative). Clinical workflow includes scheduled postoperative outcome collection (pain scales recorded in the medical record), confirmation of the pain score within the 9–15 month window, review of the preoperative baseline score, and abstraction into quality reporting or registries. Typical site of service is an outpatient clinic or hospital outpatient department during a routine postoperative follow-up visit. Typical patient scenario includes a spine surgeon or orthopedic surgeon-led postoperative evaluation and documentation of patient-reported leg pain using the visual analog scale or numeric pain scale.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
22 | Increased procedural services | When additional work beyond the typical service is documented and meets payer criteria |