G9845 — Patient received anti-egfr monoclonal antibody therapy
G9845 is a HCPCS Level II code for patient received anti-egfr monoclonal antibody therapy. 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 G9845
- Long descriptor
- Patient received anti-egfr monoclonal antibody therapy
- Short descriptor
- Pt recd anti-egfr ther
- 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 G9845
HCPCS has no hierarchy — related items simply sit next to each other in the numbering. If G9845 is not quite right, the correct code is very often within a few positions of it.
- G9837Trastuzumab not administered within 12 months of diagnosisterminated
- G9838Patient has metastatic disease at diagnosis
- G9839Anti-egfr monoclonal antibody therapy
- G9840Ras (kras and nras) gene mutation testing performed before initiation of anti-egfr moab
- G9841Ras (kras and nras) gene mutation testing not performed before initiation of anti-egfr moab
- G9842Patient has metastatic disease at diagnosis
- G9843Ras (kras or nras) gene mutation
- G9844Patient did not receive anti-egfr monoclonal antibody therapy
- G9846Patients who died from cancer
- G9847Patient received systemic cancer-directed therapy in the last 14 days of life
- G9848Patient did not receive systemic cancer-directed therapy in the last 14 days of life
- G9849Patients who died from cancerterminated
- G9850Patient had more than one emergency department visit in the last 30 days of lifeterminated
- G9851Patient had one or less emergency department visits in the last 30 days of lifeterminated
- G9852Patients who died from cancerterminated
- G9853Patient admitted to the icu in the last 30 days of lifeterminated
Questions about G9845
What is HCPCS code G9845?
G9845 is a HCPCS Level II code for patient received anti-egfr monoclonal antibody therapy. It sits in the Procedures and Professional Services (Temporary) section.
Does Medicare cover G9845?
The CMS HCPCS file marks G9845 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 G9845 paid under the physician fee schedule?
G9845 carries PFS status code M. Measurement code. Used for reporting purposes only; never paid.