Summary & Overview
HCPCS G9552: Incidental Thyroid Nodule <1.0 cm Noted in Report
HCPCS Level II code G9552 denotes an incidental thyroid nodule less than 1.0 cm documented in a report. Nationally, this code standardizes documentation for small, asymptomatic thyroid nodules detected incidentally on imaging studies, supporting consistent clinical follow-up, quality measurement, and administrative categorization. Use of a discrete HCPCS Level II code for incidental subcentimeter nodules can improve clarity in imaging reports, facilitate case-mix adjustments, and inform population-level surveillance of incidental findings.
Key payers included in the analysis are Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of the clinical context for subcentimeter thyroid nodules, expected sites of service where this code is applied, and what the code signifies for documentation and billing workflows. The publication summarizes national benchmarks where available, highlights relevant policy considerations for coding incidental findings, and outlines typical reporting scenarios in radiology and outpatient diagnostic settings.
Data not available in the input for associated taxonomies, specific ICD-10 pairings, and detailed payer-specific reimbursement guidance are noted. The focus remains on clinical meaning, coding purpose, and practical implications for reporting incidental small thyroid nodules at a national level.
Billing Code Overview
HCPCS Level II code G9552 describes an incidental thyroid nodule under 1.0 cm noted in a report. This code is used to identify a clinically documented, asymptomatic thyroid nodule smaller than 1.0 cm that was observed incidentally on imaging or pathology reports.
-
Service type: Documentation and reporting of an incidental, subcentimeter thyroid nodule
-
Typical site of service: Radiology or outpatient imaging/diagnostic settings where incidental thyroid findings are documented
Clinical & Coding Specifications
Clinical Context
A 54-year-old woman undergoes a contrast-enhanced neck CT for evaluation of carotid artery disease. Imaging report documents an incidental thyroid nodule measuring 8 mm in the right thyroid lobe. The nodule is asymptomatic and was not the indication for the study. The radiology report includes the finding: G9552 — "Incidental thyroid nodule < 1.0 cm noted in report." Typical workflow: imaging performed in an outpatient radiology suite or hospital radiology department; radiologist documents incidental small thyroid nodule in the CT or ultrasound report; the referring clinician (primary care physician, endocrinologist, or surgeon) reviews the report, correlates with clinical exam, and determines need for follow-up ultrasound, ultrasound-guided fine-needle aspiration (if growth or suspicious features), or routine surveillance. Typical site of service is outpatient radiology or hospital outpatient imaging. Common patient scenario: incidental, asymptomatic subcentimeter thyroid nodule discovered during imaging for unrelated neck or vascular indications; no immediate invasive procedure is performed based solely on this finding.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
22 | Increased procedural services | When work required is substantially greater than typical for associated service (rarely applicable for incidental finding reports). |