G9837 Trastuzumab not administered within 12 months of diagnosis

Short descriptor: Trastuz not in 12 mos dx

⚠ Terminated HCPCS Level II 2026
Terminated Code
G9837 was terminated as of 2020-12-31 and should not be reported for dates of service after that date. This page is retained for historical reference.
Open G9837 in the app →

Look up G9837 alongside ICD-10-CM diagnoses, the HCPCS Table of Drugs, and the AI coding assistant.

G9837 is the HCPCS Level II code for Trastuzumab not administered within 12 months of diagnosis (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
2021-01-01
Termination Date
2020-12-31
2026 Maintenance
No change this year

References

Cite This Page

Reference G9837 with the canonical source and edition:

G9837 — Trastuzumab not administered within 12 months of diagnosis. ICD-10 Coding Pro (HCPCS Level II 2026). https://icd10codingpro.com/hcpcs-codes/G9837

Canonical URL: https://icd10codingpro.com/hcpcs-codes/G9837

Related Codes in Section G

← G9836 Rsn no trast given doc G9838 → Pt met dis at dx
G9833 Transf pract aft init chemo G9834 Pt met dis at dx G9835 Trastuz given w/in 12 mos dx G9836 Rsn no trast given doc G9838 Pt met dis at dx G9839 Anti-egfr mon anti ther G9840 Gene testing performed G9841 Gene testing not performed G9842 Pt met dis at dx G9843 Kras or nras gene mutation
Browse all HCPCS Level II sections →
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

Get HCC Mappings, Clinical Summaries, and More

Access premium features including HCC risk adjustment, FDA drug indications, AI coding assistant, and comprehensive clinical context.

Start Free Trial