G9830 — Her-2/neu positive
G9830 is a HCPCS Level II code for her-2/neu positive. It belongs to the Procedures and Professional Services (Temporary) section. Whether Medicare pays it depends on the coverage rule below.
Medicare coverage: Carrier judgment
Coverage is decided by your Medicare contractor, not by national policy. Whether this is paid depends on the LCD for your jurisdiction and on what the documentation supports.
From the coverage field of the CMS Alpha-Numeric HCPCS File, release 2026Q3-Jul. This states Medicare’s position on the code, not on your particular claim.
Physician fee schedule statusM
Measurement code. Used for reporting purposes only; never paid.
Global period: XXX
Want the dollar amount for your locality? The fee calculator applies your GPCI and the current conversion factor.
The CMS record for G9830
- Long descriptor
- Her-2/neu positive
- Short descriptor
- Her-2 pos
- Added
- January 1, 2017
- BETOS
- Z2
- Pricing indicator
- 00 — Not priced by Part B
The official wording. This is what the code means.
CMS's 28-character form, which is what shows up on a remittance advice.
When CMS introduced the code.
Berenson-Eggers Type of Service — CMS's own analytic grouping.
Service not separately priced by Part B — not covered, bundled into another service, or used by Part A only.
Codes adjacent to G9830
HCPCS has no hierarchy — related items simply sit next to each other in the numbering. If G9830 is not quite right, the correct code is very often within a few positions of it.
- G9822Patients who had an endometrial ablation procedure during the 12 months prior to the index date (exclusive of the index date)
- G9823Endometrial sampling or hysteroscopy with biopsy and results documented during the 12 months prior to the index date (exclusive of the index date) of the endometrial ablation
- G9824Endometrial sampling or hysteroscopy with biopsy and results not documented during the 12 months prior to the index date (exclusive of the index date) of the endometrial ablation
- G9825Her-2/neu negative or undocumented/unknownterminated
- G9826Patient transferred to practice after initiation of chemotherapyterminated
- G9827Her2-targeted therapies not administered during the initial course of treatmentterminated
- G9828Her2-targeted therapies administered during the initial course of treatmentterminated
- G9829Breast adjuvant chemotherapy administeredterminated
- G9831Ajcc stage at breast cancer diagnosis = ii or iii
- G9832Ajcc stage at breast cancer diagnosis = i (ia or ib) and t-stage at breast cancer diagnosis = t1c
- G9833Patient transfer to practice after initiation of chemotherapyterminated
- G9834Patient has metastatic disease at diagnosisterminated
- G9835Trastuzumab administered within 12 months of diagnosisterminated
- G9836Reason for not administering trastuzumab documented (e.g. patient declined, patient died, patient transferred, contraindication or other clinical exclusion, neoadjuvant chemotherapy or radiation not complete)terminated
- G9837Trastuzumab not administered within 12 months of diagnosisterminated
- G9838Patient has metastatic disease at diagnosis
Questions about G9830
What is HCPCS code G9830?
G9830 is a HCPCS Level II code for her-2/neu positive. It sits in the Procedures and Professional Services (Temporary) section.
Does Medicare cover G9830?
The CMS HCPCS file marks G9830 as "Carrier judgment". Coverage is decided by your Medicare contractor, not by national policy. Whether this is paid depends on the LCD for your jurisdiction and on what the documentation supports.
How is G9830 paid under the physician fee schedule?
G9830 carries PFS status code M. Measurement code. Used for reporting purposes only; never paid.