C40.90 – Malignant neoplasm of unspecified bones and articular cartilage of unspecified limb

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

Billable code

ICD-10-CM code C40.90

Code: C40.90 (claims format: C4090)
Description: Malignant neoplasm of unspecified bones and articular cartilage of unspecified limb
Short description: Malig neoplasm of unsp bones and artic cartlg of unsp limb
Billable: Yes – valid for HIPAA-covered transactions
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 › C40.9

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

Use additional code:

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

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.-)

Index terms for C40.90

Entries in the ICD-10-CM alphabetic index that lead to this code:

Adamantinoma, long bones

Related codes in C40.9

Frequently asked questions

What is ICD-10 code C40.90?

C40.90 is the ICD-10-CM code for malignant neoplasm of unspecified bones and articular cartilage of unspecified limb, in the block C40-C41 (Malignant neoplasms of bone and articular cartilage).

Is C40.90 a billable code?

Yes. C40.90 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does C40.90 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.