C40 – Malignant neoplasm of bone and articular cartilage of limbs

ICD-10-CM 2027 diagnosis code · Malignant neoplasms of bone and articular cartilage

Non-billable header

ICD-10-CM code C40

Code: C40 (claims format: C40)
Description: Malignant neoplasm of bone and articular cartilage of limbs
Billable: No – use a more specific code below
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 2. Neoplasms (C00-D49)
Block: C40-C41 Malignant neoplasms of bone and articular cartilage

Billable codes under C40

C40 is a header code and cannot be used on claims. Choose the most specific code:

C40.0 – Malignant neoplasm of scapula and long bones of upper limbHeader (more codes below)
C40.1 – Malignant neoplasm of short bones of upper limbHeader (more codes below)
C40.2 – Malignant neoplasm of long bones of lower limbHeader (more codes below)
C40.3 – Malignant neoplasm of short bones of lower limbHeader (more codes below)
C40.8 – Malignant neoplasm of overlapping sites of bone and articular cartilage of limbHeader (more codes below)
C40.9 – Malignant neoplasm of unspecified bones and articular cartilage of limbHeader (more codes below)

Notes for C40

Use additional code:

code to identify major osseous defect, if applicable (M89.7-)

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

Block C40-C41

Includes:

malignant neoplasm of cartilage (articular) (joint)
malignant neoplasm of periosteum

Excludes1 (not coded here):

malignant neoplasm of bone marrow NOS (C96.9)
malignant neoplasm of synovia (C49.-)

Frequently asked questions

What is ICD-10 code C40?

C40 is the ICD-10-CM code for malignant neoplasm of bone and articular cartilage of limbs, in the block C40-C41 (Malignant neoplasms of bone and articular cartilage).

Is C40 a billable code?

No. C40 is a header code with more specific child codes; report one of the billable codes listed above.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.