C40.2 Malignant neoplasm of long bones of lower limb

The ICD-10-CM code for Malignant neoplasm of long bones of lower limb is C40.2 (FY2026). It is a non-billable category code — select a more specific code below for claims.

Classification

Chapter

2: Neoplasms (C00-D49)

Section

C40-C41: Malignant neoplasms of bone and articular cartilage (C40-C41)

Category C40

25 codes (18 billable)

FY2026 Status

Stable since FY2024

Also Known As

ICD-10-CM Alphabetic Index entries that lead to C40.2:

• Ameloblastoma › tibial
• Adamantinoma › tibial
• Ameloblastoma › long bones › lower limb
• Adamantinoma › long bones › lower limb

Official Coding Guidelines

Tx of primary site (TOC entry)

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

Tx of secondary site (TOC entry)

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

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

References

• CMS — ICD-10-CM Official Code Set and Guidelines, FY2026
• CDC/NCHS — ICD-10-CM Files and Browser Tool