Summary & Overview
HCPCS G9832: AJCC Stage I (T1c) at Breast Cancer Diagnosis
HCPCS Level II code G9832 documents AJCC stage I (IA or IB) with a T-stage of T1c at breast cancer diagnosis. This staging code captures an early-stage breast tumor size category and is used to record clinical stage information in administrative and quality reporting contexts. Accurate staging codes inform treatment planning, care coordination, registry reporting, and performance measurement across oncology care.
Key national payers addressed include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise explanation of the code’s clinical meaning, typical settings where it is used, and implications for documentation and claims processing. The publication provides benchmarks and policy context where available, clarifies common billing and reporting uses, and summarizes how G9832 fits into cancer staging capture for quality measurement and registry submission.
This summary is intended for national audiences including clinicians, revenue cycle professionals, and policy analysts seeking clear guidance on the purpose and reporting context of HCPCS Level II code G9832. Data not available in the input will be noted where relevant.
Billing Code Overview
HCPCS Level II code G9832 denotes AJCC stage at breast cancer diagnosis = I (IA or IB) and T-stage at breast cancer diagnosis = T1c. This code is used to capture staging details at the time of breast cancer diagnosis, indicating an early-stage tumor classified as T1c within stage I (subcategories IA or IB).
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Service type: Cancer staging information derived from diagnostic evaluation
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Typical site of service: Oncology clinics and hospital outpatient settings where initial breast cancer staging is documented
Clinical & Coding Specifications
Clinical Context
A 58-year-old woman presents to a multidisciplinary breast clinic after an abnormal screening mammogram and core needle biopsy that confirmed invasive ductal carcinoma. Clinical staging workup, including diagnostic mammography, breast ultrasound, and MRI as indicated, shows a primary tumor confined to the breast with tumor size corresponding to T1c (greater than 1 cm but not greater than 2 cm). Pathology and imaging concordance indicate early-stage disease consistent with AJCC stage I (IA or IB) at initial breast cancer diagnosis. The typical workflow includes: referral from radiology to surgical oncology for discussion of breast-conserving surgery versus mastectomy; preoperative counseling with medical oncology and radiation oncology as indicated; documentation of AJCC clinical and pathologic stage in the medical record and tumor registry; and coding of the encounter for quality measures and registry reporting.
Typical site of service is an outpatient breast clinic, surgical clinic, or ambulatory surgery center where staging documentation and treatment planning occur. The typical patient scenario involves preoperative staging, documentation of AJCC stage and T-stage in the chart, coordination of imaging and pathology results, and multidisciplinary care planning.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
22 | Increased procedural services | Use when work required is substantially greater than typically required for similar services, documented with rationale and increased complexity related to staging or added procedures. |