C40.91 - Malignant neoplasm of unspecified bones and articular cartilage of right limb

Version 2023

ICD-10:	C40.91
Short Description:	Malig neoplasm of unsp bones and artic cartlg of right limb
Long Description:	Malignant neoplasm of unspecified bones and articular cartilage of right 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)

1. Tabular List of Diseases and Injuries
2. Diagnostic Related Groups - MS-DRG Mapping
3. Convert to ICD-9 Code
4. Table of Neoplasms
5. Patient Education
6. Related Codes Browser
7. Code History

C40.91 is a billable ICD-10 code used to specify a medical diagnosis of malignant neoplasm of unspecified bones and articular cartilage of right 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 the parent code C40.9 of the current diagnosis code given the correct histological behavior: Neoplasm, neoplastic bone (periosteum) limb NEC .

Unspecified diagnosis codes like C40.91 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.

Diagnostic Related Groups - MS-DRG Mapping

The is diagnosis code is grouped in the following groups for version MS-DRG V40.0 What are Diagnostic Related Groups?
The Diagnostic Related Groups (DRGs) are a patient classification scheme which provides a means of relating the type of patients a hospital treats. The DRGs divides all possible principal diagnoses into mutually exclusive principal diagnosis areas referred to as Major Diagnostic Categories (MDC). applicable from 10/01/2022 through 09/30/2023.

MS-DRG	MS-DRG Title	MCD	Relative Weight
542	PATHOLOGICAL FRACTURES AND MUSCULOSKELETAL AND CONNECTIVE TISSUE MALIGNANCY WITH MCC	08	1.828
543	PATHOLOGICAL FRACTURES AND MUSCULOSKELETAL AND CONNECTIVE TISSUE MALIGNANCY WITH CC	08	1.089
544	PATHOLOGICAL FRACTURES AND MUSCULOSKELETAL AND CONNECTIVE TISSUE MALIGNANCY WITHOUT CC/MCC	08	0.7781

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 to ICD-9 Code

Source ICD-10 Code		Target ICD-9 Code
C40.91		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

The parent code C40.9 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) »limb NEC	C40.9	C79.51		D16.9

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]

Related Codes Browser

ICD Code	Description	Valid for Submission
C40	Malignant neoplasm of bone and articular cartilage of limbs	NON-BILLABLE CODE
C40.0	Malignant neoplasm of scapula and long bones of upper limb	NON-BILLABLE CODE
C40.00	Malignant neoplasm of scapula and long bones of unspecified upper limb	BILLABLE CODE
C40.01	Malignant neoplasm of scapula and long bones of right upper limb	BILLABLE CODE
C40.02	Malignant neoplasm of scapula and long bones of left upper limb	BILLABLE CODE
C40.1	Malignant neoplasm of short bones of upper limb	NON-BILLABLE CODE
C40.10	Malignant neoplasm of short bones of unspecified upper limb	BILLABLE CODE
C40.11	Malignant neoplasm of short bones of right upper limb	BILLABLE CODE
C40.12	Malignant neoplasm of short bones of left upper limb	BILLABLE CODE
C40.2	Malignant neoplasm of long bones of lower limb	NON-BILLABLE CODE
C40.20	Malignant neoplasm of long bones of unspecified lower limb	BILLABLE CODE
C40.21	Malignant neoplasm of long bones of right lower limb	BILLABLE CODE
C40.22	Malignant neoplasm of long bones of left lower limb	BILLABLE CODE
C40.3	Malignant neoplasm of short bones of lower limb	NON-BILLABLE CODE
C40.30	Malignant neoplasm of short bones of unspecified lower limb	BILLABLE CODE
C40.31	Malignant neoplasm of short bones of right lower limb	BILLABLE CODE
C40.32	Malignant neoplasm of short bones of left lower limb	BILLABLE CODE
C40.8	Malignant neoplasm of overlapping sites of bone and articular cartilage of limb	NON-BILLABLE CODE
C40.80	Malignant neoplasm of overlapping sites of bone and articular cartilage of unspecified limb	BILLABLE CODE
C40.81	Malignant neoplasm of overlapping sites of bone and articular cartilage of right limb	BILLABLE CODE
C40.82	Malignant neoplasm of overlapping sites of bone and articular cartilage of left limb	BILLABLE CODE
C40.9	Malignant neoplasm of unspecified bones and articular cartilage of limb	NON-BILLABLE CODE
C40.90	Malignant neoplasm of unspecified bones and articular cartilage of unspecified limb	BILLABLE CODE
C40.92	Malignant neoplasm of unspecified bones and articular cartilage of left limb	BILLABLE CODE

Code History

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 (First year ICD-10-CM implemented into the HIPAA code set)

Previous Code: C40.90

Parent Code: C40.9

Next Code: C40.92

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