Alphabetic Index FY2027

C57.10

Malignant neoplasm of unspecified broad ligament

FY2027Chapter 2: Neoplasms/C51–C58 Malignant neoplasms of female genital organs

BillableComplete code, valid to report
    Care settingsIPF Comorbidity · Oncology Treatment

    C57.10 (also written C5710) is a billable ICD-10-CM diagnosis code for malignant neoplasm of unspecified broad ligament. It is part of the FY2027 code set, effective October 1, 2026. It is one of the 14 codes in category C57 (Malignant neoplasm of other and unspecified female genital organs).

    Guidelines tip

    From the FY2027 Official Guidelines. ICD10Ref adds no rules of its own.

    A primary malignancy code stays in use until treatment directed at that site is completed. After that, with no evidence of disease at the site, Z85 gives the former site.

    Guidelines I.C.2.mCurrent malignancy versus personal history of malignancyRead the official text

    Care settings

    How CMS programs treat this code. These are CMS claim edits and list entries, not coverage or eligibility rules.

    IPF Comorbidity

    On the CMS IPF comorbidity list.

    Comorbidity categoryFactor
    Oncology Treatment1.44
    It counts as a comorbidity when reported as a secondary diagnosis and actively treated during the stay. An IPF receives only one adjustment within a category and can receive adjustments in more than one category.

    Source: CMS IPF PPS FY 2027 final rule (CMS-1847-F), Addendum B-3 (comorbidity codes with adjustment factor); effective for discharges on or after October 1, 2026

    Includes

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

    Also from chapter/block level (1 note)
    Inherited from C51–C58 Malignant neoplasms of female genital organs
    • malignant neoplasm of skin of female genital organs

    Notes

    Also from chapter/block level (8 notes)
    Inherited from Chapter 2 Neoplasms
    • 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).