2027 ICD-10-CM Diagnosis Code C41Malignant neoplasm of bone and articular cartilage of other and unspecified sites

ICD-10-CM Codes›C00–D49›C40-C41›C41

ICD-10-CM C41
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

C41 is a non-billable ICD-10-CM category code for malignant neoplasm of bone and articular cartilage of other and unspecified sites, so it cannot be submitted on claims. Use a more specific code from this category instead, such as C41.0, C41.1, C41.2, and C41.3.

Code Identity

ICD-10-CM Code
C41
Billable Status
No — Non-Billable Category
Code Describes
Malignant neoplasm of bone and articular cartilage of other and unspecified sites
Short Description
Malignant neoplasm of bone/artic cartl of and unsp sites
Chapter
C40-C41
Malignant neoplasms of bone and articular cartilage

Code Classification

ChapterC00–D49Neoplasms
SectionC40-C41Malignant neoplasms of bone and articular cartilage
CategoryC41Malignant neoplasm of bone and articular cartilage of other and unspecified sites
This CodeC41Malignant neoplasm of bone and articular cartilage of other and unspecified sites

Specific Coding for Malignant neoplasm of bone/artic cartl of and unsp sitesOverview

Non-specific codes like C41 require more characters. Use one of these billable codes instead:

  • Use C41.0 for Malignant neoplasm of bones of skull and face

  • Use C41.1 for Malignant neoplasm of mandible

  • Use C41.2 for Malignant neoplasm of vertebral column

  • Use C41.3 for Malignant neoplasm of ribs, sternum and clavicle

  • Use C41.4 for Malignant neoplasm of pelvic bones, sacrum and coccyx

  • Use C41.9 for Malignant neoplasm of bone and articular cartilage, unspecified

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to C41: its own notes plus those printed at block C40-C41 and Chapter 2. A note printed at a category, block or chapter applies to every code under it.

Includes

Further defines, or gives examples of, the content of the category.

From Block C40-C41 Malignant neoplasms of bone and articular cartilage applies to 24 codes
  • malignant neoplasm of cartilage (articular) (joint)
  • malignant neoplasm of periosteum

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

On C41 itself
  • malignant neoplasm of bones of limbs (C40.-)
  • malignant neoplasm of cartilage of ear (C49.0)
  • malignant neoplasm of cartilage of eyelid (C49.0)
  • malignant neoplasm of cartilage of larynx (C32.3)
  • malignant neoplasm of cartilage of limbs (C40.-)
  • malignant neoplasm of cartilage of nose (C30.0)
From Block C40-C41 Malignant neoplasms of bone and articular cartilage applies to 24 codes
  • malignant neoplasm of bone marrow NOS (C96.9)
  • malignant neoplasm of synovia (C49.-)

Notes

General instructions on how these codes are used.

From Chapter 2 (C00-D49) Neoplasms applies to 1,730 codes
  • Functional activity
  • All neoplasms are classified in this chapter, whether they are functionally active or not. An additional code from Chapter 4 may be used, to identify functional activity associated with any neoplasm.
  • Morphology [Histology]
  • Chapter 2 classifies neoplasms primarily by site (topography), with broad groupings for behavior, malignant, in situ, benign, etc. The Table of Neoplasms should be used to identify the correct topography code. In a few cases, such as for malignant melanoma and certain neuroendocrine tumors, the morphology (histologic type) is included in the category and codes.
  • Primary malignant neoplasms overlapping site boundaries
  • A primary malignant neoplasm that overlaps two or more contiguous (next to each other) sites should be classified to the subcategory/code .8 ('overlapping lesion'), unless the combination is specifically indexed elsewhere. For multiple neoplasms of the same site that are not contiguous, such as tumors in different quadrants of the same breast, codes for each site should be assigned.
  • Malignant neoplasm of ectopic tissue
  • Malignant neoplasms of ectopic tissue are to be coded to the site mentioned, e.g., ectopic pancreatic malignant neoplasms are coded to pancreas, unspecified (C25.9).

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name C41, its category, or a range that includes it.

Applicable To 1

These notes mention C41.

  • Z85.83 Personal history of malignant neoplasm of bone and soft tissue
    Conditions classifiable to C40-C41; C45-C49 names C40-C41, which includes this code

Excludes1 1

These codes carry an Excludes1 note naming C41: they are not reported together with it, unless the two conditions are unrelated.

  • C49 Malignant neoplasm of other connective and soft tissue
    articular (C40-C41) names C40-C41, which includes this code

Code First 1

These codes say to code first a condition named in the note, and C41 is one of the conditions named.

  • M90.6 Osteitis deformans in neoplastic diseases
    the neoplasm (C40.-, C41.-)

Patient EducationClinical

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.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About C41Overview

Is C41 a billable code?

No. This is a category header that groups the codes for malignant neoplasm of bone and articular cartilage of other and unspecified sites, and headers cannot be submitted on claims. Claims for malignant neoplasm of bone and articular cartilage of other and unspecified sites need a more specific code from this category, such as C41.0, C41.1, and C41.2.

Can C41 be reported with a code from C40?

Not as a rule. The Excludes1 note on C41 lists "malignant neoplasm of bones of limbs (C40.-)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).