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  6. 2024 ICD-10-CM Code C40.30

2024 ICD-10-CM Diagnosis Code C40.30

Malignant neoplasm of short bones of unspecified lower limb

ICD-10-CM Code:
C40.30
ICD-10 Code for:
Malignant neoplasm of short bones of unspecified lower limb
Is Billable?
Yes - Valid for Submission
Chronic Condition Indicator: [1]
Chronic
Code Navigator:

Code Classification

  • Neoplasms
    (C00–D49)
    • Malignant neoplasms of bone and articular cartilage
      (C40-C41)
      • Malignant neoplasm of bone and articular cartilage of limbs
        (C40)

C40.30 is a billable diagnosis code used to specify a medical diagnosis of malignant neoplasm of short bones of unspecified lower limb. The code is valid during the current fiscal year for the submission of HIPAA-covered transactions from October 01, 2023 through September 30, 2024.

The following anatomical sites found in the Table of Neoplasms reference the parent code C40.3 of the current diagnosis code given the correct histological behavior: Neoplasm, neoplastic bone (periosteum) ankle ; Neoplasm, neoplastic bone (periosteum) astragalus ; Neoplasm, neoplastic bone (periosteum) calcaneus ; Neoplasm, neoplastic bone (periosteum) cuboid ; Neoplasm, neoplastic bone (periosteum) foot ; Neoplasm, neoplastic bone (periosteum) heel ; Neoplasm, neoplastic bone (periosteum) limb NEC lower (long bones) short bones ; etc

Unspecified diagnosis codes like C40.30 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:

  • Malignant neoplasm of calcaneum
  • Malignant neoplasm of fifth metatarsal bone
  • Malignant neoplasm of first metatarsal bone
  • Malignant neoplasm of fourth metatarsal bone
  • Malignant neoplasm of intermediate cuneiform
  • Malignant neoplasm of lateral cuneiform
  • Malignant neoplasm of medial cuneiform
  • Malignant neoplasm of metatarsal bone of foot
  • Malignant neoplasm of navicular
  • Malignant neoplasm of phalanges of foot
  • Malignant neoplasm of second metatarsal bone
  • Malignant neoplasm of short bone of lower limb
  • Malignant neoplasm of third metatarsal bone
  • Neoplasm of calcaneus
  • Neoplasm of calcaneus
  • Neoplasm of cuboid
  • Neoplasm of first cuneiform bone of foot
  • Neoplasm of first cuneiform bone of foot
  • Neoplasm of metatarsal bone
  • Neoplasm of metatarsal bone
  • Neoplasm of metatarsal bone
  • Neoplasm of metatarsal bone
  • Neoplasm of metatarsal bone
  • Neoplasm of metatarsal bone
  • Neoplasm of navicular bone of foot
  • Neoplasm of navicular bone of foot
  • Neoplasm of phalanx of foot
  • Neoplasm of phalanx of foot
  • Neoplasm of second cuneiform bone of foot
  • Neoplasm of second cuneiform bone of foot
  • Neoplasm of talus
  • Neoplasm of third cuneiform bone of foot
  • Neoplasm of third cuneiform bone of foot
  • Primary malignant neoplasm of calcaneus
  • Primary malignant neoplasm of cuboid
  • Primary malignant neoplasm of first cuneiform bone of foot
  • Primary malignant neoplasm of long bone of lower limb
  • Primary malignant neoplasm of navicular bone of foot
  • Primary malignant neoplasm of phalanx of foot
  • Primary malignant neoplasm of second cuneiform bone of foot
  • Primary malignant neoplasm of short bone of lower limb
  • Primary malignant neoplasm of talus
  • Primary malignant neoplasm of tarsal bone
  • Primary malignant neoplasm of third cuneiform bone of foot
  • Sarcoma of bone of foot

Clinical Classification

Convert C40.30 to ICD-9-CM

  • ICD-9-CM Code: 170.8 - Mal neo bones ankle/foot
    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

The parent code C40.3 of the current diagnosis 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
  »bone (periosteum)
    »ankle
C40.3C79.51 D16.3  
»Neoplasm, neoplastic
  »bone (periosteum)
    »astragalus
C40.3C79.51 D16.3  
»Neoplasm, neoplastic
  »bone (periosteum)
    »calcaneus
C40.3C79.51 D16.3  
»Neoplasm, neoplastic
  »bone (periosteum)
    »cuboid
C40.3C79.51 D16.3  
»Neoplasm, neoplastic
  »bone (periosteum)
    »foot
C40.3C79.51 D16.3  
»Neoplasm, neoplastic
  »bone (periosteum)
    »heel
C40.3C79.51 D16.3  
»Neoplasm, neoplastic
  »bone (periosteum)
    »limb NEC
      »lower (long bones)
        »short bones
C40.3C79.51 D16.3  
»Neoplasm, neoplastic
  »bone (periosteum)
    »metatarsus (any)
C40.3C79.51 D16.3  
»Neoplasm, neoplastic
  »bone (periosteum)
    »navicular
C40.3C79.51    
»Neoplasm, neoplastic
  »bone (periosteum)
    »navicular
      »ankle
C40.3C79.51    
»Neoplasm, neoplastic
  »bone (periosteum)
    »phalanges
C40.3C79.51    
»Neoplasm, neoplastic
  »bone (periosteum)
    »phalanges
      »foot
C40.3C79.51    
»Neoplasm, neoplastic
  »bone (periosteum)
    »scaphoid
      »of ankle
C40.3C79.51    
»Neoplasm, neoplastic
  »bone (periosteum)
    »tarsus (any)
C40.3C79.51    
»Neoplasm, neoplastic
  »bone (periosteum)
    »toe (any)
C40.3C79.51    
»Neoplasm, neoplastic
  »metatarsus (any bone)
C40.3C79.51 D16.3  
»Neoplasm, neoplastic
  »phalanges
C40.3C79.51 D16.3  
»Neoplasm, neoplastic
  »phalanges
    »foot
C40.3C79.51 D16.3  
»Neoplasm, neoplastic
  »tarsus (any bone)
C40.3C79.51 D16.3  

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:

  • Osteosarcoma - occurs most often between ages 10 and 19. It is more common in the knee and upper arm.
  • Chondrosarcoma - starts in cartilage, usually after age 40
  • Ewing's sarcoma - occurs most often in children and teens under 19. It is more common in boys than girls.

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

  • FY 2024 - No Change, effective from 10/1/2023 through 9/30/2024
  • FY 2023 - No Change, effective from 10/1/2022 through 9/30/2023
  • FY 2022 - No Change, effective from 10/1/2021 through 9/30/2022
  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016. This was the first year ICD-10-CM was implemented into the HIPAA code set.

Footnotes

[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:

  • The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
  • The condition places limitations on self-care, independent living, and social interactions.