C40.20 - Malignant neoplasm of long bones of unspecified lower limb

Version 2023
ICD-10:C40.20
Short Description:Malignant neoplasm of long bones of unspecified lower limb
Long Description:Malignant neoplasm of long bones of unspecified lower limb
Status: Valid for Submission
Version:ICD-10-CM 2023
Code Classification:
  • Neoplasms (C00–D48)
    • Malignant neoplasms of bone and articular cartilage (C40-C41)
      • Malignant neoplasm of bone and articular cartilage of limbs (C40)

C40.20 is a billable ICD-10 code used to specify a medical diagnosis of malignant neoplasm of long bones of unspecified lower limb. The code is valid during the fiscal year 2023 from October 01, 2022 through September 30, 2023 for the submission of HIPAA-covered transactions.

The following anatomical sites found in the Table of Neoplasms reference this diagnosis code given the correct histological behavior: Neoplasm, neoplastic patella .

Unspecified diagnosis codes like C40.20 are acceptable when clinical information is unknown or not available about a particular condition. Although a more specific code is preferable, unspecified codes should be used when such codes most accurately reflect what is known about a patient's condition. Specific diagnosis codes should not be used if not supported by the patient's medical record.

Approximate Synonyms

The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:

Convert to ICD-9 Code

Source ICD-10 CodeTarget ICD-9 Code
C40.20170.7 - Mal neo long bones leg
Approximate Flag - The approximate mapping means there is not an exact match between the ICD-10 and ICD-9 codes and the mapped code is not a precise representation of the original code.

Table of Neoplasms

This code is referenced in the table of neoplasms by anatomical site. For each site there are six possible code numbers according to whether the neoplasm in question is malignant, benign, in situ, of uncertain behavior, or of unspecified nature. The description of the neoplasm will often indicate which of the six columns is appropriate.

Where such descriptors are not present, the remainder of the Index should be consulted where guidance is given to the appropriate column for each morphological (histological) variety listed. However, the guidance in the Index can be overridden if one of the descriptors mentioned above is present.

Neoplasm, neoplastic Malignant
Primary
Malignant
Secondary
CaInSitu Benign Uncertain
Behavior
Unspecified
Behavior
»Neoplasm, neoplastic
  »patella
C40.20C79.51

Patient Education


Bone Cancer

Cancer that starts in a bone is uncommon. Cancer that has spread to the bone from another part of the body is more common.

There are three types of bone cancer:

The most common symptom of bone cancer is pain. Other symptoms vary, depending on the location and size of the cancer. Surgery is often the main treatment for bone cancer. Other treatments may include amputation, chemotherapy, and radiation therapy. Because bone cancer can come back after treatment, regular follow-up visits are important.

NIH: National Cancer Institute


[Learn More in MedlinePlus]

Primary Bone Cancer

Learn about the types of bone tumors and the methods used to diagnose and treat cancers that form from bone tissue.
[Learn More in MedlinePlus]

Code History