G9100 – Oncology; disease status; gastric cancer, limited to adenocarcinoma as predominant cell type; post r0 resection (with or without neoadjuvant therapy) with no evidence of disease recurrence, progression, or metastases (for use in a medicare-approved demonstration project)

HCPCS Level II code · G codes: Procedures / Professional Services (Temporary)

Active code Carrier judgment

HCPCS codeG9100
Long description
Oncology; disease status; gastric cancer, limited to adenocarcinoma as predominant cell type; post r0 resection (with or without neoadjuvant therapy) with no evidence of disease recurrence, progression, or metastases (for use in a medicare-approved demonstration project)
Short description
Onc dx gastric no recurrence
Pricing indicator
00 Not separately priced by Part B (bundled, not covered or Part A only)
Medicare coverage
C Carrier judgment – coverage decided by the Medicare contractor
BETOS category
P7B Oncology - other
Added
January 1, 2006
Last change
January 1, 2007 – No change

Frequently asked questions

What is HCPCS code G9100?

G9100 is a HCPCS Level II code for oncology; disease status; gastric cancer, limited to adenocarcinoma as predominant cell type; post r0 resection (with or without neoadjuvant therapy) with no evidence of disease recurrence, progression, or metastases (for use in a medicare-approved demonstration project).

Does Medicare cover G9100?

The HCPCS file lists coverage code C: Carrier judgment – coverage decided by the Medicare contractor. Coverage and payment also depend on local coverage determinations and the patient’s plan.

Nearby G codes

Source: CMS HCPCS Level II quarterly file, October 2026. Reference only – check payer policy before billing.