2024 ICD-10-CM Diagnosis Code C41.9

Approximate Synonyms

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

• Carcinoma of bone, connective tissue, skin and breast
• Chondrosarcoma
• Chondrosarcoma of bone
• Diaphyseal medullary stenosis with bone malignancy
• Ewing's sarcoma of bone
• Extraskeletal mesenchymal chondrosarcoma
• Extraskeletal myxoid chondrosarcoma
• Large cell Ewing sarcoma of bone
• Local recurrence of malignant tumor of bone
• Macrocytosis - no anemia
• Malignant neoplasm of bone
• Malignant neoplasm of bone, connective tissue, skin and breast
• Malignant neoplasm of bone, connective tissue, skin and breast
• Malignant neoplasm of skeletal system
• Malignant neoplasm of vertebra
• Metastatic extraskeletal osteosarcoma
• Metastatic malignant neoplasm to articular cartilage
• Metastatic malignant neoplasm to articular cartilage
• Metastatic malignant neoplasm to articular cartilage
• Metastatic malignant neoplasm to articular cartilage
• Metastatic malignant neoplasm to clavicle
• Metastatic malignant neoplasm to long bone of upper limb
• Metastatic malignant neoplasm to rib
• Metastatic malignant neoplasm to sternum
• Metastatic malignant neoplasm to vertebral column
• Metastatic malignant neoplasm to vertebral column
• Metastatic osteosarcoma to articular cartilage of clavicle
• Metastatic osteosarcoma to articular cartilage of rib
• Metastatic osteosarcoma to articular cartilage of sternum
• Metastatic osteosarcoma to articular cartilage of vertebra
• Metastatic osteosarcoma to bone
• Metastatic osteosarcoma to bone of clavicle
• Metastatic osteosarcoma to bone of head
• Metastatic osteosarcoma to bone of rib
• Metastatic osteosarcoma to bone of sternum
• Metastatic osteosarcoma to bone of vertebra
• Non-anemic red cell disorder
• Osteosarcoma of articular cartilage of clavicle
• Osteosarcoma of articular cartilage of rib
• Osteosarcoma of articular cartilage of sternum
• Osteosarcoma of articular cartilage of vertebra
• Osteosarcoma of bone
• Osteosarcoma of bone of clavicle
• Osteosarcoma of bone of head
• Osteosarcoma of bone of rib
• Osteosarcoma of bone of upper limb
• Osteosarcoma of bone of vertebra
• Osteosarcoma of sternum
• Osteosarcoma, limb anomalies, erythroid macrocytosis syndrome
• Overlapping malignant neoplasm of bone and articular cartilage
• Primary chondrosarcoma of articular cartilage
• Primary chondrosarcoma of bone
• Primary large cell Ewing sarcoma of bone
• Primary malignant neoplasm of articular cartilage
• Primary malignant neoplasm of bone
• Primary osteosarcoma
• Sarcoma of bone
• Sarcoma of bone and connective tissue
• Sarcoma of clavicle
• Sarcoma of rib
• Sarcoma of sternum
• Sarcoma of vertebra

Clinical Information

• Chondrosarcoma

  a slowly growing malignant neoplasm derived from cartilage cells, occurring most frequently in pelvic bones or near the ends of long bones, in middle-aged and old people. most chondrosarcomas arise de novo, but some may develop in a preexisting benign cartilaginous lesion or in patients with enchondromatosis. (stedman, 25th ed)

• Chondrosarcoma, Clear Cell

  a chondrosarcoma of adolescence to old age of the proximal epiphyses of long bones. it has variably clear cytoplasm of the mostly neoplastic chondrocytes with little intervening matrix.

• Chondrosarcoma, Mesenchymal

  a rare aggressive variant of chondrosarcoma, characterized by a biphasic histologic pattern of small compact cells intermixed with islands of cartilaginous matrix. mesenchymal chondrosarcomas have a predilection for flat bones; long tubular bones are rarely affected. they tend to occur in the younger age group and are highly metastatic. (devita jr et al., cancer: principles & practice of oncology, 3d ed, p1456)

• Enchondromatosis

  benign growths of cartilage in the metaphyses of several bones.

C41.9 is grouped with Diagnostic Related Groups - MS-DRG Mapping

Diagnostic Related Groups (DRGs) are a classification system used to group together diagnosis codes for the purpose of reimbursement and healthcare management. DRGs are used to standardize the way hospitals and other providers are paid for inpatient services. In this system patients are grouped together based on their principal diagnosis in areas referred to as Major Diagnostic Categories (MDC). Once a patient is assigned a particular diagnostic category, providers receive a predetermined payment rate for the services rendered. This reimbursement rate is often fixed and is meant to cover the cost of care for that patient. Reimbursement is also affected by the relative weight of a diagnostic related group based on the severity of a patient's illness and the associated cost of care during hospitalization.

Diagnostic related groups encourage healthcare providers to focus on quality and efficiency in patient care while managing costs effectively. The diagnosis code is present in the following groups for version MS-DRG V41.0 applicable from 10/01/2023 through 09/30/2024.

MS-DRG	MS-DRG Title	MCD	Relative Weight
542	PATHOLOGICAL FRACTURES AND MUSCULOSKELETAL AND CONNECTIVE TISSUE MALIGNANCY WITH MCC	08	1.8237
543	PATHOLOGICAL FRACTURES AND MUSCULOSKELETAL AND CONNECTIVE TISSUE MALIGNANCY WITH CC	08	1.0907
544	PATHOLOGICAL FRACTURES AND MUSCULOSKELETAL AND CONNECTIVE TISSUE MALIGNANCY WITHOUT CC/MCC	08	0.7675

The relative weight of a diagnostic related group determines the reimbursement rate based on the severity of a patient's illness and the associated cost of care during hospitalization.

Convert C41.9 to ICD-9-CM

• ICD-9-CM Code: 170.9 - Malig neopl bone NOS
  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.

Filter table of neoplasms:

Neoplasm, neoplastic	Malignant Primary	Malignant Secondary	CaInSitu	Benign	Uncertain Behavior	Unspecified Behavior
»Neoplasm, neoplastic   »bone (periosteum)	C41.9	C79.51		D16.9	D48.0	D49.2
»Neoplasm, neoplastic   »bone (periosteum)     »cartilage NEC	C41.9	C79.51		D16.9	D48.0	D49.2
»Neoplasm, neoplastic   »bone (periosteum)     »cuneiform	C41.9	C79.51		D16.9	D48.0	D49.2
»Neoplasm, neoplastic   »cartilage (articular) (joint) NEC [See Also: Neoplasm, bone]	C41.9	C79.51		D16.9	D48.0	D49.2
»Neoplasm, neoplastic   »joint NEC [See Also: Neoplasm, bone]	C41.9	C79.51		D16.9	D48.0	D49.2
»Neoplasm, neoplastic   »skeleton, skeletal NEC	C41.9	C79.51		D16.9	D48.0	D49.2

Patient Education

Cancer

Cancer begins in your cells, which are the building blocks of your body. Normally, your body forms new cells as you need them, replacing old cells that die. Sometimes this process goes wrong. New cells grow even when you don't need them, and old cells don't die when they should. These extra cells can form a mass called a tumor. Tumors can be benign or malignant. Benign tumors aren't cancer while malignant ones are. Cells from malignant tumors can invade nearby tissues. They can also break away and spread to other parts of the body.

Cancer is not just one disease but many diseases. There are more than 100 different types of cancer. Most cancers are named for where they start. For example, lung cancer starts in the lung, and breast cancer starts in the breast. The spread of cancer from one part of the body to another is called metastasis. Symptoms and treatment depend on the cancer type and how advanced it is. Most treatment plans may include surgery, radiation and/or chemotherapy. Some may involve hormone therapy, immunotherapy or other types of biologic therapy, or stem cell transplantation.

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.