Summary & Overview
HCPCS G9422: Primary Lung Carcinoma Resection Report
HCPCS Level II code G9422 denotes a standardized report documenting primary lung carcinoma resection with patient category, pn category and, for non-small cell lung cancer, specific histologic type. Accurate documentation captured by this code supports surgical pathology records, oncology staging, quality measurement and downstream care planning for lung cancer patients. Nationally, consistent use of this code facilitates clinical communication and may affect coding workflows and quality reporting for thoracic surgery and oncology programs.
Key payers covered in this overview include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare and Medicare. Readers will find a concise explanation of the code's clinical purpose and typical settings, plus context needed for billing and administrative teams. The publication outlines common benchmarks and reporting expectations, clarifies the clinical context for non-small cell versus other lung cancers, and identifies where data is not available in the input. The content is intended for coding managers, surgical and pathology departments, and payer contracting teams seeking a national view of the code's role in documentation and reporting. Data not available in the input includes detailed payer-specific coverage rules, associated taxonomies, ICD-10 diagnosis mappings and related codes.
Billing Code Overview
HCPCS Level II code G9422 represents documentation of a primary lung carcinoma resection report that records patient category, pathologic node (pn) category and, for non-small cell lung cancer, the histologic type (for example, squamous cell carcinoma or adenocarcinoma rather than NSCLC-NOS). This service is clinical documentation and reporting associated with surgical resection of primary lung cancer.
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Service type: Surgical pathology / operative report documentation related to lung cancer resection
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Typical site of service: Inpatient hospital or ambulatory surgical center during or following lung resection procedures
Clinical & Coding Specifications
Clinical Context
A 68-year-old patient with a solitary pulmonary nodule on chest CT, PET-CT uptake suspicious for malignancy, and preoperative biopsy suggesting non-small cell lung cancer (NSCLC) is scheduled for a surgical resection (lobectomy or segmentectomy). The surgical pathology report documents primary lung carcinoma resection findings including pathologic T (pt) and N (pn) categories and, for NSCLC, a precise histologic type such as squamous cell carcinoma or adenocarcinoma (not reported as nsclc-nos). Typical workflow: preoperative evaluation in thoracic surgery clinic, imaging and staging with CT/PET and possible mediastinal staging (EBUS or mediastinoscopy), intraoperative resection with lymph node sampling or dissection, and submission of the resection specimen to surgical pathology. The pathology service generates a detailed resection report that includes tumor size, margins, lymph node status (pn category), histologic subtype, grade, and any ancillary testing (immunohistochemistry, molecular studies) necessary for NSCLC management. Typical sites of service are the inpatient hospital operating room and hospital-based pathology laboratory; ambulatory surgical centers may be involved for selected limited resections. Common patient scenario modifiers: complex operative time or increased pathology work (e.g., Modifier 22), use of general anesthesia (Modifier AS), or teaching surgeon participation (Modifier 62). Payors commonly involved in authorization and claims for the episode include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, BUCA, and Medicare.