Summary & Overview
HCPCS G2145: Postoperative Oswestry Disability Index Assessment
HCPCS Level II code G2145 identifies a postoperative functional outcome assessment using the Oswestry Disability Index (ODI version 2.1a) when the three-month score (6–20 weeks) exceeds 22 and the improvement from preoperative baseline is less than 30 points. This code signals suboptimal functional recovery after spinal or related procedures and is used to document persistent disability for administrative, quality, and potential utilization review purposes. Nationally, standardized outcome reporting has grown in prominence for tracking patient recovery and informing coverage and reimbursement decisions.
Key payers considered include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise explanation of the clinical context for the code, typical sites of service, and what the code captures about postoperative functional status. The publication outlines benchmarks and reporting considerations, highlights how payers may interpret persistent disability on claims, and summarizes policy implications for documentation and coding accuracy. Data not available in the input for associated taxonomies, ICD-10 diagnoses, and related codes is noted where relevant in detailed sections.
Billing Code Overview
HCPCS Level II code G2145 documents postoperative functional status assessment using the Oswestry Disability Index (ODI version 2.1a). The code applies when the ODI score at three months (6–20 weeks) postoperatively is greater than 22 and the change from the preoperative ODI to the three-month postoperative ODI is less than 30 points, indicating persistent or insufficient improvement in functional status.
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Service Type: Postoperative functional status assessment using a standardized patient-reported outcome measure (Oswestry Disability Index, version 2.1a)
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Typical Site of Service: Outpatient clinic or postoperative follow-up visit where patient-reported outcome instruments are administered and scored
Clinical & Coding Specifications
Clinical Context
A 58-year-old patient undergoes lumbar spine surgery for degenerative disc disease and radiculopathy. Preoperative baseline functional assessment using the Oswestry Disability Index (ODI version 2.1a) is performed within three months prior to surgery. At a routine postoperative visit at approximately three months (6–20 weeks), the clinician administers the ODI again. The measured ODI at three months is greater than 22 and the change from the preoperative ODI to the three-month ODI demonstrates an improvement of less than 30 points. Clinical workflow includes: review of preoperative ODI in the electronic medical record, administration and scoring of the ODI during the postoperative visit, documentation of both numeric ODI scores and the calculated change in functional status, correlation with the patient’s pain, neurologic exam, and imaging as appropriate, and coding/billing using the appropriate HCPCS Level II code G2145 when the documented criteria match the code descriptor. Typical site of service is an outpatient spine surgery clinic or ambulatory surgery center follow-up visit where standardized outcome measures are collected and documented.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
22 | Increased procedural services | When documentation supports significantly greater work or complexity for the postoperative visit or outcome assessment beyond typical practice |