C40.9 – Malignant neoplasm of unspecified bones and articular cartilage of limb
ICD-10-CM 2027 diagnosis code · Malignant neoplasms of bone and articular cartilage
- Code
C40.9(claims format:C409)- Description
- Malignant neoplasm of unspecified bones and articular cartilage of limb
- Short description
- Malignant neoplasm of unsp bones and artic cartilage of limb
- 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
- Parent codes
- C40
Billable codes under C40.9
C40.9 is a header code and cannot be used on claims. Choose the most specific code:
Notes inherited from parent codes
Instructional notes at a category or block level apply to every code below it.
C40 – Malignant neoplasm of bone and articular cartilage of limbs
- code to identify major osseous defect, if applicable (M89.7-)
Block C40-C41
- malignant neoplasm of cartilage (articular) (joint)
- malignant neoplasm of periosteum
Index terms for C40.9
Entries in the ICD-10-CM alphabetic index that lead to this code:
Related codes in C40
- C40.0 – Malignant neoplasm of scapula and long bones of upper limbHeader
- C40.1 – Malignant neoplasm of short bones of upper limbHeader
- C40.2 – Malignant neoplasm of long bones of lower limbHeader
- C40.3 – Malignant neoplasm of short bones of lower limbHeader
- C40.8 – Malignant neoplasm of overlapping sites of bone and articular cartilage of limbHeader
Frequently asked questions
What is ICD-10 code C40.9?
C40.9 is the ICD-10-CM code for malignant neoplasm of unspecified bones and articular cartilage of limb, in the block C40-C41 (Malignant neoplasms of bone and articular cartilage).
Is C40.9 a billable code?
No. C40.9 is a header code with more specific child codes; report one of the billable codes listed above.
What category does C40.9 belong to?
It belongs to category C40 – Malignant neoplasm of bone and articular cartilage of limbs.
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.