G9835 – Trastuzumab administered within 12 months of diagnosis
HCPCS Level II code · G codes: Procedures / Professional Services (Temporary)
HCPCS codeG9835
- Long description
- Trastuzumab administered within 12 months of diagnosis
- Short description
- Trastuz given w/in 12 mos dx
- Pricing indicator
00Not separately priced by Part B (bundled, not covered or Part A only)- Medicare coverage
CCarrier judgment – coverage decided by the Medicare contractor- BETOS category
Z2Undefined codes- Added
- January 1, 2017
- Last change
- January 1, 2021 – No change
- Termination date
- December 31, 2020
Frequently asked questions
What is HCPCS code G9835?
G9835 is a HCPCS Level II code for trastuzumab administered within 12 months of diagnosis. It was discontinued on December 31, 2020.
Does Medicare cover G9835?
The HCPCS file lists coverage code C: Carrier judgment – coverage decided by the Medicare contractor. Coverage and payment also depend on local coverage determinations and the patient’s plan.
Nearby G codes
- G9827 – Her2-targeted therapies not administered during the initial course of treatment
- G9828 – Her2-targeted therapies administered during the initial course of treatment
- G9829 – Breast adjuvant chemotherapy administered
- G9830 – Her-2/neu positive
- G9831 – Ajcc stage at breast cancer diagnosis = ii or iii
- G9832 – Ajcc stage at breast cancer diagnosis = i (ia or ib) and t-stage at breast cancer diagnosis = t1c
- G9833 – Patient transfer to practice after initiation of chemotherapy
- G9834 – Patient has metastatic disease at diagnosis
- G9836 – Reason for not administering trastuzumab documented (e.g. patient declined, patient died, patient transferred, contraindication or other clinical exclusion, neoadjuvant chemotherapy or radiation not complete)
- G9837 – Trastuzumab not administered within 12 months of diagnosis
- G9838 – Patient has metastatic disease at diagnosis
- G9839 – Anti-egfr monoclonal antibody therapy
- G9840 – Ras (kras and nras) gene mutation testing performed before initiation of anti-egfr moab
- G9841 – Ras (kras and nras) gene mutation testing not performed before initiation of anti-egfr moab
- G9842 – Patient has metastatic disease at diagnosis
- G9843 – Ras (kras or nras) gene mutation
Source: CMS HCPCS Level II quarterly file, October 2026. Reference only – check payer policy before billing.