C49.A2 Gastrointestinal stromal tumor of stomach

✓ Billable ICD-10-CM 2026
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The ICD-10-CM code for Gastrointestinal stromal tumor of stomach is C49.A2 (FY2026). It is a billable, claim-ready diagnosis code.

Classification

Section
C45-C49: Malignant neoplasms of mesothelial and soft tissue (C45-C49)
Category C49
24 codes (20 billable)
FY2026 Status
Stable since FY2024

Also Known As

ICD-10-CM Alphabetic Index entries that lead to C49.A2:

  • Tumor › stromal › stomach
  • Tumor › stromal › gastrointestinal › stomach
  • Tumor › stromal › gastric › malignant
  • Tumor › stromal › stomach › malignant
  • Tumor › stromal › gastrointestinal › malignant › stomach

U.S. Hospital Utilization

  • An estimated 6,630 U.S. inpatient stays in 2023 included C49.A2 among the documented diagnoses.
  • 4,055 stays listed it as the principal diagnosis.

Source: National Inpatient Sample (NIS), Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality, 2016–2023. National survey-weighted estimates.

Official Coding Guidelines

Tx of primary site (TOC entry)

a. Admission/Encounter for treatment of primary site ............................................................. 33

— ICD-10-CM Official Guidelines for Coding and Reporting, FY2026, Section I.C.2.a
Tx of secondary site (TOC entry)

b. Admission/Encounter for treatment of secondary site .......................................................... 33

— ICD-10-CM Official Guidelines for Coding and Reporting, FY2026, Section I.C.2.b

Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026

References

Related Codes

Parent Code

C49 Malignant neoplasm of other connective and soft tissue

Related Codes in C49

C49 Malignant neoplasm of other connective and soft tissue C49.0 Malignant neoplasm of connective and soft tissue of head, face and neck C49.1 Malignant neoplasm of connective and soft tissue of upper limb, including shoulder C49.10 Malignant neoplasm of connective and soft tissue of unspecified upper limb, including shoulder C49.11 Malignant neoplasm of connective and soft tissue of right upper limb, including shoulder C49.12 Malignant neoplasm of connective and soft tissue of left upper limb, including shoulder C49.2 Malignant neoplasm of connective and soft tissue of lower limb, including hip C49.20 Malignant neoplasm of connective and soft tissue of unspecified lower limb, including hip C49.21 Malignant neoplasm of connective and soft tissue of right lower limb, including hip C49.22 Malignant neoplasm of connective and soft tissue of left lower limb, including hip C49.3 Malignant neoplasm of connective and soft tissue of thorax C49.4 Malignant neoplasm of connective and soft tissue of abdomen C49.5 Malignant neoplasm of connective and soft tissue of pelvis C49.6 Malignant neoplasm of connective and soft tissue of trunk, unspecified C49.8 Malignant neoplasm of overlapping sites of connective and soft tissue C49.9 Malignant neoplasm of connective and soft tissue, unspecified C49.A Gastrointestinal stromal tumor C49.A0 Gastrointestinal stromal tumor, unspecified site C49.A1 Gastrointestinal stromal tumor of esophagus C49.A3 Gastrointestinal stromal tumor of small intestine
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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: 2025-10-01

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