C40.9 Malignant neoplasm of unspecified bones and articular cartilage of limb

⚠ Non-Billable ICD-10-CM 2026
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The ICD-10-CM code for Malignant neoplasm of unspecified bones and articular cartilage of limb is C40.9 (FY2026). It is a non-billable category code — select a more specific code below for claims.

Classification

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 C40.9:

  • Ameloblastoma › long bones

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

C40 Malignant neoplasm of bone and articular cartilage of limbs

More Specific Codes

C40.90 Malignant neoplasm of unspecified bones and articular cartilage of unspecified limb C40.91 Malignant neoplasm of unspecified bones and articular cartilage of right limb C40.92 Malignant neoplasm of unspecified bones and articular cartilage of left limb

Related Codes in C40

C40 Malignant neoplasm of bone and articular cartilage of limbs C40.0 Malignant neoplasm of scapula and long bones of upper limb C40.00 Malignant neoplasm of scapula and long bones of unspecified upper limb C40.01 Malignant neoplasm of scapula and long bones of right upper limb C40.02 Malignant neoplasm of scapula and long bones of left upper limb C40.1 Malignant neoplasm of short bones of upper limb C40.10 Malignant neoplasm of short bones of unspecified upper limb C40.11 Malignant neoplasm of short bones of right upper limb C40.12 Malignant neoplasm of short bones of left upper limb C40.2 Malignant neoplasm of long bones of lower limb C40.20 Malignant neoplasm of long bones of unspecified lower limb C40.21 Malignant neoplasm of long bones of right lower limb C40.22 Malignant neoplasm of long bones of left lower limb C40.3 Malignant neoplasm of short bones of lower limb C40.30 Malignant neoplasm of short bones of unspecified lower limb C40.31 Malignant neoplasm of short bones of right lower limb C40.32 Malignant neoplasm of short bones of left lower limb C40.8 Malignant neoplasm of overlapping sites of bone and articular cartilage of limb C40.80 Malignant neoplasm of overlapping sites of bone and articular cartilage of unspecified limb C40.81 Malignant neoplasm of overlapping sites of bone and articular cartilage of right limb
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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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