Summary & Overview
HCPCS G2144: Postoperative Oswestry Disability Index Functional Status
HCPCS Level II code G2144 captures a specific postoperative functional outcome using the Oswestry Disability Index (ODI version 2.1a). It applies when a patient’s ODI score at three months (6–20 weeks) post-surgery is 22 or less, or when the ODI shows a clinically meaningful improvement of 30 points or more compared with a preoperative score taken within three months prior to surgery. The code documents patient-reported functional recovery after spine-related procedures and supports outcome-based reporting.
This national-level code is relevant to payers that emphasize value-based outcomes and surgical quality metrics. Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find context on the clinical intent of the code, the typical service setting, and what the code represents for outcome tracking. The publication outlines what stakeholders commonly evaluate when this code is billed: postoperative functional status, timing of assessment, and magnitude of improvement.
The report also summarizes benchmarks and policy considerations affecting use of G2144, highlighting how it fits into outcome measurement strategies and postoperative reporting workflows. Data not available in the input are noted where relevant.
Billing Code Overview
HCPCS Level II code G2144 describes a postoperative functional status assessment using the Oswestry Disability Index (ODI version 2.1a). The measure applies when functional status at three months (6–20 weeks) postoperatively is less than or equal to 22, or when the ODI score shows an improvement of 30 points or greater from within three months preoperative baseline to the three-month postoperative assessment.
-
Service type: Postoperative functional status measurement using a validated patient-reported outcome instrument (Oswestry Disability Index).
-
Typical site of service: Outpatient postoperative follow-up visit or outpatient clinic where patient-reported outcome measures are collected and documented.
Data not available in the input for Associated Taxonomies, ICD-10 Diagnoses, and Related Codes.
Clinical & Coding Specifications
Clinical Context
A 56-year-old patient underwent lumbar decompression and fusion for degenerative lumbar spondylosis with radiculopathy. The surgeon orders postoperative functional outcome measurement using the Oswestry Disability Index (ODI) version 2.1a at the routine three-month visit (6–20 weeks) to document functional recovery. The patient completes a preoperative ODI within three months before surgery and again at the three-month postoperative visit. The clinical workflow includes: preoperative baseline ODI administration in clinic or via secure patient portal, standardized scoring and documentation in the electronic health record, postoperative ODI administration at the three-month follow-up, comparison of scores to determine either an absolute postoperative ODI score ≤22 or an improvement of ≥30 points from the preoperative score, and documentation of the result on the visit note to support quality reporting or value-based care payment criteria. Typical sites of service include hospital outpatient departments, ambulatory surgery centers, and orthopedic or spine specialty clinics. Common patient factors include postoperative pain control, physical therapy participation, and assessment for complications such as wound issues or persistent neurologic deficits.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
22 | Increased procedural services | Use when documentation supports substantially greater work than typical for the service (e.g., complex counseling alongside functional assessment). |