G9841 HCPCS Level II Code: Ras (kras and nras) gene mutation testing not performed before initiation of anti-egfr moab
Medicare Coverage & Payment
- CMS short descriptor: Gene testing not performed
- Medicare coverage: Carrier judgment (CMS coverage code C)
- Payment category: Service not separately priced (pricing indicator 00)
- BETOS: Z2 — Undefined codes
- Last CMS action effective: January 1, 2018
Source: CMS HCPCS Level II release. Coverage codes indicate how Medicare treats the code, not whether a specific claim will be paid; payer policy and documentation still govern.
Contextual Map
Every relationship of G9841 in one view: hierarchy, official tabular instructions in both directions, clinical classification, risk adjustment, MS-DRG participation, index terms and change history — each edge carrying the CMS source it derives from.
Nearest codes (40)
- G9821 — No documentation of a chlamydia screening test with proper follow-up[Sibling]
- G9822 — Patients who had an endometrial ablation procedure during the 12 months prior to the index date (exclusive of the index date)[Sibling]
- G9823 — Endometrial 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[Sibling]
- G9824 — Endometrial 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[Sibling]
- G9825 — Her-2/neu negative or undocumented/unknown[Sibling]
- G9826 — Patient transferred to practice after initiation of chemotherapy[Sibling]
- G9827 — Her2-targeted therapies not administered during the initial course of treatment[Sibling]
- G9828 — Her2-targeted therapies administered during the initial course of treatment[Sibling]
- and 32 more
Change history
- January 1, 2017 — Added to the code set [Change history]
Sources for this page
Every coding fact on this page is read from the datasets below. Nothing is AI-generated; MedCoder-derived relationships and editorial are labelled where they appear.
- Code, descriptors, coverage and pricing attributes
- CMS HCPCS Alpha-Numeric (ANWEB) release — July 2026 quarterly update
- Change history and date-of-service validity
- CMS HCPCS quarterly update files, ingested into the change ledger
- Comparisons, relationships and the contextual map MedCoder-derived
- Derived by MedCoder from the tabular notes and tables above; every derived relationship is marked as derived where it appears
Change history
- January 1, 2017Added to the code setRas (kras and nras) gene mutation testing not performed before initiation of anti-egfr moab
Nearest Codes in This Family
Official HCPCS Level II classifications closest to G9841 in its code family, with their registry titles.
- 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…
- 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
- G9842 — Patient has metastatic disease at diagnosis
- G9843 — Ras (kras or nras) gene mutation
- G9844 — Patient did not receive anti-egfr monoclonal antibody therapy
- G9845 — Patient received anti-egfr monoclonal antibody therapy
- G9846 — Patients who died from cancer