G9841 Ras (kras and nras) gene mutation testing not performed before initiation of anti-egfr moab

Short descriptor: Gene testing not performed

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G9841 is the HCPCS Level II code for Ras (kras and nras) gene mutation testing not performed before initiation of anti-egfr moab (2026). It belongs to Section G — Procedures / Professional Services (Temporary). Under Medicare, its coverage status is: Carrier judgment. Part B pricing methodology: Not separately priced by Part B.

Classification & CMS Attributes

Medicare Coverage
Carrier judgment (code C)
Part B Pricing
Not separately priced by Part B (indicator 00)
Type of Service
Medical care
Effective Date
2018-01-01
2026 Maintenance
No change this year

References

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Reference G9841 with the canonical source and edition:

G9841 — Ras (kras and nras) gene mutation testing not performed before initiation of anti-egfr moab. ICD-10 Coding Pro (HCPCS Level II 2026). https://icd10codingpro.com/hcpcs-codes/G9841

Canonical URL: https://icd10codingpro.com/hcpcs-codes/G9841

Related Codes in Section G

← G9840 Gene testing performed G9842 → Pt met dis at dx
G9837 Trastuz not in 12 mos dx G9838 Pt met dis at dx G9839 Anti-egfr mon anti ther G9840 Gene testing performed G9842 Pt met dis at dx G9843 Kras or nras gene mutation G9844 Pt no recd anti-egfr ther G9845 Pt recd anti-egfr ther G9846 Pt died from cancer G9847 Pt recd chemo last 14d life
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Reviewed by Prajwal Shrestha, CPC, CRC
Certified Professional Coder (CPC) and Certified Risk Adjustment Coder (CRC) · AAPC Member ID 01997614 · About · Editorial policy · Content last reviewed: 2026-01-01

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